Inventors list

Assignees list

Classification tree browser

Top 100 Inventors

Top 100 Assignees


Cementing, plugging or consolidating

Subclass of:

166 - Wells

166244100 - PROCESSES

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
166292000 Using specific materials 199
166288000 Including heating 18
166286000 Tamping, vibrating, exploding or using receptacle 8
166289000 Discharging cement from casing at different levels 8
166291000 With piston separator 7
166287000 Removable molding or forming means 4
20090032257Method and Apparatus for Consolidating a Wellbore - This invention relates to a method and to a tool to consolidate a wellbore by displacing conventional cement slurry or any other settable fluid, without any permanent casing. A bladder is inflated inside the bore to act as a mold and to form an annulus that can be filled by cement slurry or any other settable fluid. When the cement or the resin is set, the form is retrieved by straight pull; leaving a cement or resin sheath to support the formation without requiring any re-dulling. The sheath can be perforated if necessary (in the producing zone). Applications include without limitations temporary cementation of mono-diameter wells, through-tubing repair of an open hole, or cementation of a slotted liner in water, oil or gas wells02-05-2009
20120205104WELLBORE PRESSURE CONTROL WITH SEGREGATED FLUID COLUMNS - A method of controlling pressure in a wellbore can include placing a barrier substance in the wellbore while a fluid is present in the wellbore, and flowing another fluid into the wellbore while the first fluid and the barrier substance are in the wellbore. The first and second fluids may have different densities. Another method can include circulating a fluid through a tubular string and an annulus formed between the tubular string and the wellbore, then partially withdrawing the tubular string from the wellbore, then placing a barrier substance in the wellbore, then partially withdrawing the tubular string from the wellbore and then flowing another fluid into the wellbore. A well system can include at least two fluids in a wellbore, the fluids having different densities, and a barrier substance separating the fluids.08-16-2012
20120168160Swellable Packer Having a Cable Conduit - The present invention provides an apparatus and assembly for creating a seal in a wellbore around a cable or line. The assembly includes a longitudinal body and a swellable portion which comprises a material selected to increase in volume on exposure to at least one triggering fluid. The swellable portion has a formation open to the longitudinal surface which provides a pathway for a cable or line to extend through the swellable portion, and an insert of swellable material. In an embodiment of the invention, the insert partly or fully encloses or encapsulates the cable or line. An aspect of the invention is characterised by the provision of a formation which is open to an outer longitudinal surface of the body.07-05-2012
20130014948Apparatus And Methods For Deploying Cementing PlugsAANM Gambier; PhilippeAACI Boa VistaAACO AOAAGP Gambier; Philippe Boa Vista AOAANM Coquilleau; LaurentAACI HoustonAAST TXAACO USAAGP Coquilleau; Laurent Houston TX USAANM Metson; JamesAACI Sugar LandAAST TXAACO USAAGP Metson; James Sugar Land TX US - An apparatus for installing cement plugs into a well, comprising a protective sleeve having one end adapted to be attached to the end of a drill pipe and arranged to carry a cementing plug around its outer surface such that a dart passing through the drill pipe can pass through the sleeve and engage only on formations on the plug to withdraw it from the end of the sleeve.01-17-2013
166290000 By tubing which is subsequently lifted 4
20120222861Mechanical Liner Drilling Cementing System - A packer setting tool sets a liner top packer by mechanical rotation of the running tool and set down weight following cementing of a liner. The packer setting tool includes a tubular release body mounted on an end of the running tool. An annular dog sub circumscribes a portion of the release body. The dog sub is linked to the release body with a shear screw. A thread on an outer surface of the release body engages a thread on an inner surface of the dog sub to define a threaded connection between the dog sub and the release body. When the running tool rotates, the thread on the release body rotates with respect to the thread on the dog sub driving the release body in an axial direction fracturing the shear screw and urges an adapter sleeve against the packer assembly to set the packer assembly.09-06-2012
20090183875Method and Apparatus to Set a Plug - The invention provides an apparatus to be lowered in a borehole, comprising: (i) a delivery section for delivering a plugging fluid; (ii) a setting section comprising a longitudinal element and a flexible and permeable sleeve into which the plugging fluid is delivered; and (iii) a disconnect mechanism to allow the delivery section to be disconnected from the setting section, characterized in that the flexible sleeve is connected by at least one floating means to the longitudinal element. Additionally, the invention provides a method of installing a plug in a borehole, comprising: positioning the apparatus as described above in the borehole at a position at which the plug is to be installed, pumping fluid into the flexible sleeve via the delivery section so as to inflate the flexible sleeve, disconnecting the setting section from the delivery section, pumping an excess of the fluid into the borehole above the plug and withdrawing the delivery section from the borehole leaving the setting section at the position, said setting section acting as the plug.07-23-2009
20120103610SEGREGATING FLOWABLE MATERIALS IN A WELL - A method of segregating flowable materials in conjunction with a subterranean well can include segregating flowable cement from a fluid by placing a flowable barrier substance between the cement and the fluid, and the barrier substance substantially preventing displacement of the cement by force of gravity through the barrier substance and into the fluid. Another method of segregating flowable materials can include flowing a barrier substance into a wellbore above a fluid already in the wellbore, and then flowing cement into the wellbore above the barrier substance. A system for use in conjunction with a subterranean well can include a flowable cement isolated from a fluid by a flowable barrier substance positioned between the cement and the fluid, whereby the barrier substance substantially prevents displacement of the cement by force of gravity through the barrier substance and into the fluid.05-03-2012
20100218951Cementing with Electric Line Coiled Tubing - An open hole is drilled with coiled tubing that has an electric line. At the conclusion of drilling the drilling bottom hole assembly is removed and a liner running tool is connected between the coiled tubing and the liner. The electric line remains in the coiled tubing but spacers can be added to keep the lower end of the electric line away from the running tool. A wiper plug has a passage therethrough and a movable stinger that can hold open a pair of flapper valves. The liner is released from the running tool and cement is delivered through the stinger with a bit of excess that is above the running tool. The lifting of the stinger with the coiled tubing closes the flappers and allows circulation out of excess cement. Setting down on the coiled tubing allows a seal to re-engage in the deployment sleeve, allowing pressure to be placed against the wiper plug, such that it can be launched to displace the remaining cement within the liner into the annulus around the liner.09-02-2010
Entries
DocumentTitleDate
20120175117METHODS AND DEVICES FOR FORMING A WELLBORE WITH CASING - Embodiments disclosed herein relate to an apparatus to fluidly couple to a casing string. The apparatus may include a fill-up and circulating tool having a flow path extending therethrough, in which the fill-up and circulating tool is configured to fluidly couple to an upper end of the casing string, a cementing head assembly having a flow path extending therethrough, in which the flow path of the cementing head assembly is fluidly coupled to the flow path of the fill-up and circulating tool, and a releasing mechanism coupled to the cementing head assembly, in which the releasing mechanism is configured to release a fluid-conveyed sealing device through the cementing head assembly and into the fill-up and circulating tool.07-12-2012
20130075095Method and Apparatus for Treatment of A Perforated Casing - A method of and apparatus for treating a zone in a well is disclosed. A tube that is permeable to a material is inserted into a wellbore, creating an annulus inside the wellbore. Two zones—the annular region and the formation surrounding the wellbore—may be treated. The method comprises the following steps. (1) A setting section surrounded by a sleeve is placed inside the tube near the zone to treat, the sleeve being expandable and impermeable to the material. (2) The sleeve is inflated inside the tube near the zone to treat, ensuring that a first zone of the tube is impermeable to the material, but leaving a second zone permeable to the material. (3) A treatment fluid is pumped to the zone to treat, the treatment fluid passing into the annulus via the second zone. (4) The zone to treat is treated with the treatment fluid.03-28-2013
20130032347Method for Generating Discrete Fracture Initiation Sites and Propagating Dominant Planar Fractures Therefrom - A method for performing a downhole perforating and fracturing operation from a wellbore (02-07-2013
20100101792Cement head - A cement head, comprising a first module comprising a first module outer profile, a second module comprising a second module outer profile, a bridge comprising a bridge profile engaged with each of the first module outer profile and the second module outer profile. A wellbore servicing apparatus, comprising a first module coaxial with a central axis, the first module comprising a first module outer surface, and a plurality of first module protrusions extending radially outward from the first module outer surface, a second module coaxial with the central axis, the second module comprising a second module outer surface, and a plurality of second module protrusions extending radially outward from the second module outer surface, a bridge having an outer bridge surface and an inner bridge surface, the bridge inner surface substantially complementing each of the first module outer surface, including the plurality of first module projections, and the second module outer surface, including the plurality of second module projections, when the first module is substantially adjacent the second module and a bridge outer surface, and a retainer coaxial with the central axis and configured to substantially radially retain the bridge toward the central axis with respect to each of the first module outer surface and the second module outer surface.04-29-2010
20090159281RUNNING BORE-LINING TUBULARS - A method of running a tubular string into a wellbore comprises running a bore-lining tubular string into a wellbore substantially without rotation, while rotating a cutting structure at a distal leading end of the tubular string. Other methods provide for rotation of the string and the provision of a non-rotating stabiliser towards the leading end of the string.06-25-2009
20090014177Method to Cement a Perforated Casing - The invention discloses a method of treating a zone of a well comprising a wellbore, a tube which is permeable to settable material, said tube forming an annulus with the wellbore; and wherein said zone is located in the annulus, the method comprises the steps of: (i) placing inside said tube a first plug; (ii) creating on said tube a first opening and a second opening, so that: the zone be located between said first and second openings and the first opening be located between said zone and said first plug; (iii) placing inside said tube a second plug, so that said second plug is located between said second opening and said zone; (iv) injecting a settable material inside said tube between said second and first plugs, so that settable material fills the annulus and the zone by passing through the first opening; and (v) eliminating said second plug.01-15-2009
20130161006DOWNHOLE SEALING USING SETTABLE MATERIAL IN AN ELASTIC MEMBRANE - A rubber pocket is described that is suitable for use on tubing, such as a packer-type seal, on casing, such as a cement-type seal, or on liners. The rubber pocket may contain cement particles, rubber particles, swellable particles, cement filled rubber particles, cement filled swellable particles, calcium oxide, magnesium oxide, magnesium sulfate, iron (III) oxide, calcium sulfoaluminate, clay, magnetic particles and/or reactants such as crosslinkers, retardants or epoxy. The particles may be bulk spheres, bulk fibers, hollow spheres, hollow fibers, etc. The rubber pocket or bladder may also be fully or partially filled with fluids such as polymer reactants. The pocket may also be empty or contain a small volume of reactants. The slurry or epoxy or other type of fluid and granular solid or injectable matter can be injected after the completion positioning downhole.06-27-2013
20090236094Full Bore Cementable Gun System - A completion method delivers cement to an open hole below a cemented casing. A gun or guns are run below a liner and a hanger and advanced into the cement before it sets up. With the gun and the liner surrounded in cement up to close to the hanger that supports the liner to the already cemented casing, the cement is allowed to set around the gun with no tubular surrounding the gun. The gun carries extra shot to enhance the perforation and can be fluid filled with clean fluid. Prior well cleaning such as with brine circulation is now limited to the region of the hanger and above. Production flow is through the perforations into the gun body allowing any residue of the explosive charge used to perforate to flow to surface09-24-2009
20120234539Lubrication system for a reciprocating apparatus - A positive displacement pump comprising a lubricant manifold comprising a first fluid pathway, a housing comprising a second fluid pathway in fluid communication with the first pathway, a crosshead slide within the housing and comprising a third fluid pathway in fluid communication with the second pathway; a crosshead configured to reciprocate within the crosshead slide, the crosshead comprising a fourth fluid pathway in fluid communication with the third pathway, the crosshead further comprising a wrist-pin having a fifth fluid pathway in fluid communication with the fourth pathway, a crankshaft within the housing, and a connecting rod disposed between the crosshead and the crankshaft and connected thereto, wherein the connecting rod comprises a sixth fluid pathway displaced from the connecting rod centerline and in fluid communication with the fifth pathway, and wherein the crankshaft end of the connecting rod comprises a seventh fluid pathway in fluid communication with the sixth pathway.09-20-2012
20110278005METHOD AND SYSTEM FOR TEMPORARILY LOCKING A TUBULAR - There is provided a system and method for temporarily locking a wellhead component while cementing it in place within a mineral extraction system. As cement is pumped into the wellhead, its temperature may be increased, leading to thermal expansion of the cement and movement of wellhead components. Disclosed embodiments include a hold-down ring configured to cooperate with tie-down screws to temporarily lock a running tool in place within the wellhead during cementing. In another embodiment, the tie-down screws may cooperate directly with the running tool. The locked running tool then blocks other wellhead components, such as a hanger run into the wellhead by the running tool, from upward axial movement due to thermal expansion of the cement during the cementing process. After the hanger is cemented in place, the running tool may be unlocked and retrieved from the wellhead.11-17-2011
20110278004COMPOSITIONS AND METODS FOR CLEANING A WELLBORE PRIOR TO CEMENTING - Single-phase microemulsions, comprising a solvent, a surfactant blend and a carrier fluid, are effective spacer fluids for use during cementing operations. The solvent may be selected from the group consisting of monoterpenes, diterpenes, and alkyl or aryl esters of short-chain alcohols. The surfactant blend comprises a water-wetting surfactant or nonionic surfactant, a co-surfactant and an oil-solubilizing surfactant. The carrier fluid is aqueous. The solvent and surfactant blend are combined with the carrier fluid to produce the well-treatment microemulsion.11-17-2011
20090205827HYDRAULIC CONNECTOR APPARATUSES AND METHODS OF USE WITH DOWNHOLE TUBULARS - A method to connect a lifting assembly to a bore of a downhole tubular includes providing a communication tool to a distal end of the lifting assembly, the communication tool comprising a body assembly, an engagement assembly, a valve assembly and a seal assembly, sealingly engaging a first portion of the seal assembly in the bore of the downhole tubular, selectively permitting fluid to flow between the lifting assembly and the downhole tubular with the valve assembly, and disengaging the first portion of the seal assembly from the bore of the downhole tubular.08-20-2009
20090236095METHOD OF CEMENTING GAS OR OIL PIPELINE AND HYDRAULIC CEMENT SLURRY - The present invention relates to a method of cementing a casing of an oil or gas pipeline to a surrounding well wall, where an hydraulic cement slurry is formed and the slurry is deployed in the annulus between the pipeline casing and the surrounding well wall. The cement slurry is formed by mixing together an hydraulic cement 12 to 24% of silica based on the weight of cement, and water; wherein the silica comprises ⅓ to ⅔ microfine silica and ⅔ to ⅓ silica flour. The invention further relates to a cement slurry for use in the method.09-24-2009
20100218950BIOCIDE FOR WELL STIMULATION AND TREATMENT FLUIDS - A well stimulation and or treatment fluid that includes water, other additives, and a biocide consisting of 3,5-dimethyl-1,3,5-thiadiazinane-2-thione in an amount effective to inhibit bacterial growth and minimize antagonistic reactions between the biocide and other additives. Also disclosed are well injection compositions, stimulations, squeezing, waterflood, packing, cement compositions, and methods for cementing.09-02-2010
20110214863SUPER SHOE SWELL PACKER - System and methods for effectively and efficiently cementing a casing annulus are disclosed. A packer system includes an outer case, a landing collar within the outer case and a slidable shifting sleeve coupled to the landing collar. The landing collar and the shifting sleeve are movable. A connecter coupled to the shifting sleeve and is movable in a movement slot with the shifting sleeve. A rubber element is coupled at one end to the connector and is on an outside surface of the outer case. The displacement of the connector in the movement slot compresses the rubber element.09-08-2011
20120097395Heatable material for well operations - Heatable wellbore material, e.g., cements, polymers, composites, and epoxies, and systems and methods using heatable material, which, in certain aspects, are methods for cementing casing in a wellbore with such cement, the heatable material, in some aspects, being one or a combination of electrically resisteively heatable material, microwave heatable material, and/or material heatable by the application thereto of a magnetic field. This abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure and is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims, 37 C.F.R. 1.72(04-26-2012
20120097394MODULAR DART LAUNCHING VALVE - The present invention relates in general to equipment for servicing subterranean wells and in particular to a cementing head that is intended to drop a combination of darts, balls, bombs and canisters in order to activate downhole equipment, launch cementing plugs, deliver chemical products, or the like. A cementing head comprises a modular valve apparatus, comprising at least two detatchable parts. This arrangement allows the operator to remove and disassemble the valve apparatus at the wellsite. Thus, repairs and maintenance may be performed at the wellsite and the valve apparatus may be reassembled and reinstalled, obviating the need to transport the equipment to a central facility.04-26-2012
20100078171METHOD AND APPARATUS FOR SEALING A HOLE MADE WITH A CASED HOLE FORMATION TESTER - Apparatus and methods for forming and sealing a hole in the sidewall of a borehole are provided. The method may include conveying a carrier into the borehole, forming the hole in the sidewall using a bit, and sealing at least a portion of the hole by leaving at least a portion of the bit in the hole. An apparatus includes a carrier conveyable into the borehole, and a bit disposed on the carrier that forms the hole in a sidewall, the bit including a sealing portion that seals at least a portion of the hole.04-01-2010
20100078170METHOD AND APPARATUS FOR FORMING AND SEALING A HOLE IN A SIDEWALL OF A BOREHOLE - Apparatus and methods for forming and sealing a hole in a sidewall of a borehole are provided. The method may include conveying a bit and a sealer into the borehole using a carrier, forming a hole in the sidewall using the bit, and introducing a sealant from the sealer to the hole along a surface portion of the bit. An apparatus includes a carrier conveyable into the borehole, a bit disposed on the carrier that forms the hole in a sidewall, and a sealer operable to introduce a sealant to the hole along a surface portion of the bit.04-01-2010
20100084135OIL WELL STAGE-CEMENTING METAL PLATE - A method and apparatus for use in stage-cementing an oil well in the region of a loss-circulation zone that is proximate an annular space defined by the lower end of an outer casing surrounding an inner casing include a load-bearing annular steel plate of substantial thickness that is positioned on, and maintained stationary relative to the inner casing by supporting and retaining means secured to the inner casing, the outer diameter of the plate being less than the inside diameter of the outer casing so that the plate can be lowered with the inner casing string to the desired location inside of the outer casing and, with a layer of gravel, to provide a seal and support the cement poured into the annulus between the inner and outer casings.04-08-2010
20110180261METHOD OF REMOVING CUTTERS - A method for enhanced degradation of a cutting structure on a drill shoe is provided. The cutting structure may be degraded at an accelerated rate after achieving a desired objective. Degradation of the cutting structures on the drill shoe may facilitate the eventual drill out of the drill shoe. In one embodiment, a method of degrading the cutting structure includes operating the drill shoe using a reduced flow rate of drilling fluid. In another embodiment, a method of degrading the cutting structure includes operating the drill shoe at an increased rotary speed. In yet another embodiment, a method of degrading the cutting structure includes operating the drill shoe with an increased weight on bit. In yet another embodiment, a method of degrading the cutting structure includes any combination of one or more of the enhanced degradation methods described herein.07-28-2011
20110079390CEMENTING SUB FOR ANNULUS CEMENTING - A cementing sub for wellbore annulus cementing that allows certain regions of the wellbore annulus to be cemented while other regions are left open for perforating, activation or controllable ported access. The cementing sub may include a tubular body including a first end, an opposite end and a wall defined between an inner bore extending from the first end to the opposite end and an outer surface; a port through the wall of the tubular body providing communication between the inner bore and the outer surface, the port including an openable closure; a conduit along the wall of the tubular extending from an inlet adjacent the first end and an outlet adjacent the opposite end, the inlet and outlet opening to the outer surface and being isolated from communication with the inner bore; a first annular packer encircling the tubular body and positioned between the port and the inlet; and a second annular packer encircling the tubular body and positioned between the port and the outlet.04-07-2011
20090260816Method and System for Cementing - A valve system for cementing including a valve and a sleeve shifter. The valve may have a moveable sleeve with openings and a housing situated about the moveable sleeve and having flow passages. The sleeve shifter may be configured to actuate the valve by moving the sleeve. The valve may be configured to be opened and/or closed multiple times. The valve may be used in reverse cementing and/or squeeze jobs.10-22-2009
20090288829CUTTING WINDOWS FOR LATERAL WELLBORE DRILLING - A system and method for cutting windows for lateral wellbore drilling. A method of cutting a window through a sidewall structure for drilling a lateral wellbore through the window includes the steps of: providing an internal profile in the sidewall structure; then installing the sidewall structure in a parent wellbore; and then cutting the window through the sidewall structure, the cutting step including engaging a cutting tool with the internal profile. The cutting step may include resisting lateral displacement of the cutting tool due to engagement between the cutting tool and the internal profile.11-26-2009
20080283244METHOD AND APPARATUS FOR DROPPING A PUMP DOWN PLUG OR BALL - An improved method and apparatus for dropping a ball, plug or dart during oil and gas well operations (e.g., cementing operations) employs a specially configured valving member with curved and flat portions that alternatively direct fluid flow through a bore or opening in the valving member via an inner channel or around the periphery of the valving member in an outer channel. In one embodiment, the ball(s), dart(s) or plug(s) are contained in a sliding sleeve that shifts position responsive to valve rotation.11-20-2008
20100276143Method and device for cleaning and sealing a well - The present invention relates to a method for cleaning and possibly sealing a subsurface well. According to the method a multichannel tool string comprising an adapter on a first end of the tool string, a guide device at the second end of the tool string are run into the well, whereupon the guide device is activated in order to permit the well to be flushed by the supply of fluid through at least one of the channels in connection with the tool string and fluids and particles from the well are transported back to the surface through at least one other of the channels in connection with the tool string. The invention also relates to a device for cleaning and possibly sealing a subsurface well.11-04-2010
20110203794Apparatus and Method for Cementing Liner - A method of cementing a liner in a well includes mounting a valve assembly that is biased in a closed position to a running tool assembly. The running tool assembly has a stinger inserted through the valve assembly, retaining the valve assembly in an open position. The stinger has a cement retainer releasably mounted to it. After lowering the running tool assembly into engagement with the liner string, the operator pumps a cement slurry through the stinger and the valve assembly. The operator then pumps the cement retainer down the liner string into latching engagement with a lower portion of the liner string. Afterward, the operator lifts the stinger from the valve assembly, causing the valve assembly to move to the closed position. The valve assembly blocks upward flow of fluid from the well conduit through the valve assembly in the event of leakage of the cement retainer.08-25-2011
20090032256THROTTLE UNIT FOR DUMP BAILER AND METHOD OF BLOCKING A WATER OUT ZONE IN A PRODUCTION WELL UTILIZING THE SAME - A method of blocking a water out zone in a production well includes the steps of connecting a throttle unit to a dump bailer, wherein the throttle unit is internally defined a flowing space, which can be adjusted in size to thereby control a flow rate of cement for blocking the water out zone; loading the cement into the dump bailer; slowly lowering down the loaded dump bailer to the water out zone in the production well; opening an outlet of the dump bailer under control, so that the cement flows from the dump bailer into the throttle unit and is released at a flow rate preset by adjusting the size of the flowing space; allowing the released cement to load up in the water out zone and slowly permeate into a gravel layer in the production well before becoming cured to block the water out zone.02-05-2009
20130213654CEMENTING WHIPSTOCK APPARATUS AND METHODS - A system and method facilitate sidetracking by eliminating one or more trips downhole. A sidetracking system includes a whipstock assembly and a stinger assembly. The stinger assembly has a stinger which extends at least partially through the whipstock assembly. The stinger is coupled to a sub of the sidetracking system by a releasable latch mechanism, such as a shear pin or collet.08-22-2013
20090250217Plug Release Apparatus - A plug release apparatus for use in a well bore, the apparatus having a canister, a liner plug, and a sub. The liner plug may be releasably attached to the canister via a first release mechanism. The sub may be releasably attached to the canister via a second release mechanism. The first release mechanism may be configured to release the liner plug from the canister at a first pressure and the second release mechanism may be configured to release the canister from the sub at a second pressure.10-08-2009
20090260817Method and Apparatus to Cement A Perforated Casing - A method of and an apparatus for treating a near zone and/or a far zone of a well is disclosed. The method comprises the following steps. (1) A tube that is permeable to a material is placed inside a wellbore, forming an annulus inside the wellbore. (2) A setting section surrounded by a sleeve is placed inside the tube. The sleeve is expandable and impermeable to the material. (3) The sleeve is inflated so that the sleeve is in contact with the tube, ensuring for a first zone of the tube is impermeable to the material, but leaving a second zone permeable to the material. (4) A treatment fluid is pumped to the zones that passes through the second zone still permeable to the material. (5) The near zone in the annulus and/or the far zone in the surrounding formation is treated with the treatment fluid.10-22-2009
20120103609COMPOSITIONS AND METHODS FOR WELL COMPLETIONS - Cement retarders for well cements are based on hydrophobins. Hydrophobins are proteins or polypeptides that form hydrophobic coatings on surfaces. The size of the hydrophobins is preferably between about 100 and 350 amino acids, and the preferred hydrophobin concentration is between about 0.001% and 1.0% by weight of cement. Portland cement is the preferred well cement. Cement slurries containing hydrophobins are useful for both primary and remedial cementing applications.05-03-2012
20090101344Water Dissolvable Released Material Used as Inflow Control Device - Methods and devices for controlling fluid flow into a wellbore tubular includes an in-flow control device, an element co-acting with the in-flow control device, and a disintegrating medium at least partially surrounding the element. The medium may be configured to release the element upon disintegration of the medium. The disintegrating medium may be configured to disintegrate when exposed to a selected fluid. The element may be configured to at least partially restrict flow across a flow path associated with the in-flow control device when released. The flow path may convey the fluid from the formation to a flow bore of the wellbore tubular and the element may be positioned along the flow path. The element may be: a liquid, a solid, a particle and/or particles. The selected fluid may be water, a hydrocarbon, an engineered fluid, and/or a naturally occurring fluid.04-23-2009
20100193190In-Situ Zonal Isolation for Sand Controlled Wells - This invention relates to a process for isolating one or more segments of a gravel packed well from other segments to treat the isolated segments and easily re-establish flow from the other segments after the treatment. The treatment includes techniques for enhancing or permanently blocking production from the isolated segment. The process includes the installation of a removable plug and a permeability poison that forms a fluid seal to prevent longitudinal fluid flow along the annular production space outside the tubular production pipe. With wireline or other low-cost wellbore workover systems, access is re-engaged with the secluded formation including removal of plugs and fluid seals within the tubular production pipe. The inventive process allows enhanced recovery of fluids by focusing treatments on problem areas without harming productive segments of the well.08-05-2010
20100212900Running and Cement Tubing - A method of running a bore-lining tubing string into a bore includes running a tubing string, typically a liner string, into a bore while agitating the string. The agitation of the string reduces the friction between the string and the bore wall and thus facilitates the translation of the string into the bore. The agitation may also take place while the tubing is being cemented in the bore. Pressure pulses may be applied to fluid in the bore, which fluid may be cement slurry.08-26-2010
20100212899DOWNHOLE GAP SEALING ELEMENT AND METHOD - Disclosed herein is a downhole sealing element. The element includes, a malleable member having at least one closed wall cavity therein positionable downhole in a gap defined between downhole members, and a chemical disposed within the at least one closed wall cavity. The malleable member is deformable to fill variations in a dimension of the gap and the chemical is reactive to form a nonflowable element.08-26-2010
20120193096Oil Well Plug Apparatus and Method - An oil well plug apparatus and method for sealing oil and gas well casings has a plug assembly with an elongate plug body. A spinning knurled bit is attached by a shaft and bearing assembly to a first tapered end of the plug body. A seal disposed on the opposing second end of the plug body fills the clearance between the plug body and a well casing when the plug body is lowered into the casing. The plug assembly includes an anchor to which a chain and cable are attached for suspending and lowering the plug assembly into the casing of a blown out well. The chain reinforces concrete back-fill and a concrete mound capping the well. The cable is severed to release the tethered control of the plug assembly from above.08-02-2012
20110056690Well Repair Using Swellable Material in a Remedial Matrix - A technique enables performance of remedial treatments to block unwanted fluid migration in a well. The remedial treatment involves formation of a slurry with a swellable material. The slurry, including the swellable material, is pumped downhole and is directed to a remediation site. When deposited at the remediation site, the slurry establishes a desired remediation treatment able to block unwanted migration of a downhole fluid.03-10-2011
20090107675Liner Drilling and Cementing System Utilizing a Concentric Inner String - A method of drilling a well and installing a liner includes assembling concentric inner and outer strings of tubulars. A drill bit is located at the lower end of the inner string and a liner with a liner hanger makes up part of the outer string. The inner and outer strings may be rotated in unison to drill the well. At a selected depth, the operator sets the liner hanger and retrieves the inner string. The operator lowers a packer and a cement retainer on a string of conduit. The packer engages the liner hanger and the cement retainer is conveyed to the lower end of the liner. The cement retainer prevents cement in the outer annulus from flowing back up the string of conduit. The operator manipulates the conduit to set the packer.04-30-2009
20100300689SEALING ASSEMBLY - A downhole sealing assembly (12-02-2010
20110000668Through tubing cable rotary system - Apparatus for performing rotary or cutting operations in a subterranean borehole or conduit, particularly sealing operations, comprises a downhole assembly connected to a cable. The downhole assembly comprising at least one of a rotary tool coupled to an electric motor or fluid motor, a rotary tool coupled to a fluid motor, or an axial cutting tool coupled to a piston. The fluid motor or piston is operated by differential fluid pressure created within the bore. Methods of sealing a subterranean borehole are also provided, in which one or more cuts are made with a cutting assembly in one or more conduits to remove at least a portion of a conduit and concrete is deposited in the resulting space. The space is free of debris, which could otherwise form leakage paths in the concrete seal. In a variant the space is created with a downhole crushing apparatus.01-06-2011
20090101345Liner Drilling System with Retrievable Bottom Hole Assembly - A liner drilling system employs a bottom hole assembly that may be retrieved before reaching the total liner depth. The system includes an outer string made up of a liner and a profile nipple. An inner string including a running tool, drill pipe, and a drill lock tool are lowered into the outer string and rotationally and axially locked to the outer string. Drilling may be performed by rotating the inner string, which also rotates the outer string. The operator may retrieve the inner string by pulling the inner string and the liner upward until the upper end of the liner is located at the drilling rig floor. While supporting the liner at the drilling rig floor, the operator retrieves the inner string, then re-runs it back into the outer string.04-23-2009
20110030954USE OF SWELLABLE MATERIAL IN AN ANNULAR SEAL ELEMENT TO PREVENT LEAKAGE IN A SUBTERRANEAN WELL - A method of sealing an annulus formed between a casing string and a surface in a well includes: positioning a seal element in the annulus, a swellable material of the seal element being positioned between the casing string and the surface; and flowing cement through a channel formed between the swellable material and the casing string. A method of sealing in a well includes the steps of: positioning an annular seal element comprising a swellable material in the well; and flowing cement into at least one channel formed longitudinally through the seal element. A method of sealing an annulus between two casing strings includes: providing multiple arcuate segments, each of the segments comprising a swellable material; and installing the segments in the annulus, each of the segments thereby occupying a respective circumferential portion of the annulus.02-10-2011
20120241155COMPOSITIONS AND METHODS FOR CLEANING A WELLBORE PRIOR TO CEMENTING - Wellbore-cleaning compositions comprising microemulsions are useful during cementing operations. The microemulsion solvent may be selected from the group comprising methyl esters and ethoxylated alcohols. The microemulsion surfactants comprise a water-wetting surfactant, a cleaning surfactant, an emulsifying surfactant, a non-ionic surfactant and a non-ionic co-surfactant. The wellbore-cleaning compositions may be pumped alone, ahead of a conventional spacer fluid or scavenger slurry and behind a conventional spacer fluid or scavenger slurry. In addition, the wellbore-cleaning composition may be incorporated into a carrier fluid such as (but not limited to) a conventional spacer fluid or scavenger slurry. The resulting fluid mixture may be pumped as a spacer fluid.09-27-2012
20100155067Systems and methods for using a passageway through subterranean strata - Systems and methods usable to urge a passageway through subterranean strata, place protective lining conduit strings between the subterranean strata and the wall of said passageway without removing the urging apparatus from said passageway, and target deeper subterranean strata formations than is normally the practice for placement of said protective lining conduit strings by providing apparatuses for reducing the particle size of rock debris to generate lost circulation material to inhibit the initiation or propagation of subterranean strata fractures.06-24-2010
20110073310Through Tubing Bridge Plug and Installation Method for Same - A through tubing bridge plug (03-31-2011
20110067865EQUIPMENT FOR REMOTE LAUNCHING OF CEMENTING PLUGS - Apparatus and methods for remotely launching cementing plugs during the primary cementation of a subterranean well. The apparatus includes a flexible sleeve that absorbs force exerted by activation devices as they arrive at a cementing head, thereby preventing premature release of a cementing plug.03-24-2011
20110067864Compositions for Improving Thermal Conductivity of Cement Systems - The present invention relates to methods of cementing in subterranean formations and associated compositions. A method of cementing in a subterranean formation comprises placing a cement composition comprising a non-metallic thermally conductive fiber into the subterranean formation, and allowing the composition to set therein, wherein the non-metallic thermally conductive fiber has a thermal conductivity greater than about 500 W/m·K. Another method of cementing in a subterranean formation comprises providing a cement composition comprising a pitch-based carbon fiber, a hydraulic cement material, and water, placing the cement composition in a formation, and allowing the cement composition to set therein, wherein said pitch-based carbon fiber has a density of from about 2.0 grams/cc to about 2.3 grams/cc. A cement composition comprising a cementitious material, water, and a non-metallic thermally conductive fiber having a thermal conductivity greater than about 500 W/m·K, or a pitch-based carbon fiber having a density of from about 2.0 grams/cc to about 2.3 grams/cc.03-24-2011
20120199348Plugging a Mined-Through Well - A system and method of plugging a well bore includes intersecting a portion of a well with a subterranean cavern. A portion of the well may be isolated to prevent accumulation of reservoir fluids in the subterranean cavern by, for example, inserting a packer in the well to form a seal. A sealing material may be pumped into and allowed of solidify in the portion of the well to form a partition between the subterranean cavern and the remainder of the well. The formed partition permits continued production from the well and continued mining in the subterranean cavern.08-09-2012
20080314591SINGLE TRIP WELL ABANDONMENT WITH DUAL PERMANENT PACKERS AND PERFORATING GUN - A method of abandoning a well includes the steps of: assembling a tool string including a perforating gun interconnected between first and second packer assemblies; conveying the tool string into a wellbore in a single trip into the wellbore; setting the first packer assembly; setting the second packer assembly; firing the perforating gun; and flowing cement into an annulus longitudinally between the first and second packer assemblies. A system for abandoning a well includes a tool string configured for conveyance into a wellbore in a single trip into the wellbore, the tool string including a perforating gun interconnected between first and second packer assemblies, each of the first and second packer assemblies including a permanent packer.12-25-2008
20110042086ADDITIVE FOR CONTROLLING CEMENT SLURRY RHEOLOGY - A cement composition for use in a wellbore comprising a cement blend and at least two polyvinylalcohols wherein the polyvinylalcohols have different degrees of hydrolysis such that the rheology of the cement slurry capable of being formed from the composition is stable during temperatures changes.02-24-2011
20120199349PLUG RETAINER AND METHOD FOR WELLBORE FLUID TREATMENT - A method for fluid treatment of a borehole including a main wellbore, a first wellbore leg extending from the main wellbore and a second wellbore leg extending from the main wellbore, the method includes: running a wellbore tubing string apparatus into the first wellbore leg; conveying a plug into the wellbore tubing string apparatus to actuate a plug-actuated sleeve in the wellbore tubing string apparatus to open a port through the wall of the wellbore tubing string apparatus covered by the sleeve; employing a plug retainer to retain the plug in the tubing string against passing outwardly from the tubing string apparatus; allowing fluids to flow toward surface outwardly from the tubing string apparatus; and performing operations in the second wellbore leg.08-09-2012
20110162844Assembly and method for placing a cement plug - An assembly for placing a cement plug (07-07-2011
20100319918CEMENT ADDITIVE FOR THE ENHANCED TREATMENT OF OIL AND GAS WELLS AND RELATED METHODS OF USE - Cement mixtures and methods are disclosed for enhancing fluid loss prevention in oil and gas wells comprising an electrolyte, a polymer and a cross linking agent.12-23-2010
20110094742Casing Shoes and Methods of Reverse-Circulation Cementing of Casing - A method having the following steps: running a circulation valve comprising a reactive material into the well bore on the casing; reverse-circulating an activator material in the well bore until the activator material contacts the reactive material of the circulation valve; reconfiguring the circulation valve by contact of the activator material with the reactive material; and reverse-circulating a cement composition in the well bore until the reconfigured circulation valve decreases flow of the cement composition. A circulation valve for cementing casing in a well bore, the valve having: a valve housing connected to the casing and comprising a reactive material; a plurality of holes in the housing, wherein the plurality of holes allow fluid communication between an inner diameter of the housing and an exterior of the housing, wherein the reactive material is expandable to close the plurality of holes.04-28-2011
20110186294OUTSIDE CASING CONVEYED LOW FLOW IMPEDANCE SENSOR GAUGE SYSTEM AND METHOD - The present document describes a sensing apparatus for lowering into a well and cementing therein at a certain depth. The sensing apparatus comprises an elongated casing and a sensor device protruding from an outside surface of the elongated casing for generating measurement data and sending the data to the surface of the well using a cable extending from the sensor device along the outside surface of the casing. A flow of cement is provided between the outside surface of the casing and the well for cementing the casing in place and isolating different layers of the well. Presence of the sensor device and the cable creates an obstruction within the flow path of the cement which may result in the formation of micro-annulus around the sensor device and the cable. In order to address this problem, a plurality of fins is provided around the casing, the fins being shaped to cause a straight flow of cement received at the fins to rotate around the longitudinal axis of the casing when exiting the fins for increasing cement flow between the elongated casing and its surrounding environment to mitigate micro-annulus formation. Another means to address this problem is to provide cable attachments which distance the cable from the casing and thereby let cement flow between the cable and the casing also mitigating micro-annulus formation.08-04-2011
20100218949Swellable Elastomers and Associated Methods - Methods are provided that include a method of reducing fluid loss in a subterranean formation comprising placing a lost circulation composition comprising a base fluid and a swellable elastomer in at least a portion of a subterranean formation comprising a lost circulation zone; allowing the swellable elastomer to at least partially swell upon contact with a fluid; and allowing the lost circulation composition to at least partially reduce the loss of fluid to the subterranean formation. Additional methods are also provided.09-02-2010
20090173499METHODOLOGY FOR SETTING OF AN INFLATABLE PACKER USING SOLID MEDIA - A seal includes a mandrel; an element disposed radially adjacent the mandrel; a chamber defined between the mandrel and the element; and a pressure regulator in fluid communication with the chamber, the regulator configured to resist fluid flow to a selected threshold pressure related to element expansion and method.07-09-2009
20120145391COMPOSITIONS AND METHODS FOR WELL COMPLETIONS - Well-cementing compositions for use in high-pressure, high-temperature (HPHT) wells usually contain a complex array of cement additives, including retarders, dispersants and fluid-loss additives. Under these extreme conditions additive degradation, reactions between additives, reactions between additives and the cement, or combinations thereof may occur—causing slurry gelation, premature setting or both. Incorporation of polyvalent-metal salts in the cement compositions can help prevent or reduce the severity of slurry gelation, setting-time reduction or both.06-14-2012
20120305249METHOD AND SYSTEM FOR ABANDONING A BOREHOLE - A method of abandoning a borehole includes, running a tool into the borehole, cutting a casing with a first portion of the tool, reaming the borehole in an area where the casing has been cut with a second portion of the tool, disconnecting a drillstring from the tool, and cementing the borehole through the drillstring12-06-2012
20120305248DRILLING FLUID THAT WHEN MIXED WITH A CEMENT COMPOSITION ENHANCES PHYSICAL PROPERTIES OF THE CEMENT COMPOSITION - According to an embodiment, a drilling fluid comprises: water and a set accelerator, wherein the drilling fluid has a 10 minute gel strength of less than 20 lb*ft/100 sq ft, wherein the drilling fluid has a density in the range of about 9 to about 14 pounds per gallon, wherein the drilling fluid remains pourable for at least 5 days, and wherein when at least one part of the drilling fluid mixes with three parts of a cement composition consisting of water and cement, the drilling fluid cement composition mixture develops a compressive strength of at least 1,200 psi. According to another embodiment, a method of using the drilling fluid comprises the steps of: introducing the drilling fluid into at least a portion of a subterranean formation, wherein at least a portion of the drilling fluid is capable of mixing with a cement composition.12-06-2012
20110315380SYSTEM FOR CEMENTING TUBULARS COMPRISING A MUD MOTOR - A method and system for cementing a tubular and mud motor in a wellbore utilizing burst disks above the mud motor. The burst disks rupture to permit the cement to flow through the burst disks and bypass the mud motor. All of the burst disks reliably rupture at a predetermined and known threshold pressure so as to permit cement to be pumped at a desired rate through all of the ruptured burst disks. Each burst disk is provided with a cover for maintaining a chamber of a known pressure between the cap and the burst disk. All of the burst disks predictably and reliably rupture at the rated pressure.12-29-2011
20110048709Cement Compositions and Associated Methods Comprising Sub-Micron Calcium Carbonate and Latex - Methods and compositions are provided that relate to cement compositions and methods comprising sub-micron calcium carbonate and latex. An embodiment includes a method of cementing in a subterranean formation. The method may comprise introducing a cement composition into the subterranean formation, wherein the cement composition comprises cement, water, sub-micron calcium carbonate, and latex. The method further may comprise allowing the cement composition to set in the subterranean formation. Another embodiment includes a cement composition that may comprise cement, water, a sub-micron calcium carbonate, and latex.03-03-2011
20120000654METHOD FOR STABILIZATION OF MINE VOIDS USING WASTE MATERIAL AND A BINDING AGENT - A highwall mining borehole backfill composition utilizing waste glass and fly ash can be used as a backfill utilizing waste products that would normally have to be landfilled. The composition is a cost effective mixture of cement, fly ash, glass and water and may incorporate additional fine and coarse aggregates as well as chemical admixtures. Fly ash takes the place of some or all of the fine aggregate, and cullet takes the place of coarse aggregate in a mixture of concrete. Use of the backfill supports the overlying strata so as to eliminate or reduce the need for barrier pillars.01-05-2012
20120000655METHODS AND APPARATUS FOR IMPROVED CEMENT PLUG PLACEMENT - A method and apparatus for making real-time measurements of downhole properties during cement plug placement. A wired placement conduit is lowered downhole releasing a sensor package. The sensor package is capable of measuring downhole properties in real-time in the period while the cement plug sets.01-05-2012
20110155373SYSTEM AND METHOD FOR REDUCING FOAM IN MIXING OPERATIONS - A technique facilitates mixing operations by removing foaming that results from air entrained during mixing of constituents. A mixing system comprises a container body having an interior and an inlet through which material enters the interior for mixing. The container body also comprises a discharge through which the mixed material is delivered downstream. A mechanical foam breaker is disposed within the container body and extends upwardly a sufficient distance to extend through a surface level to which the material rises during mixing within the container body. The mechanical foam breaker is oriented to break down foam along the surface of the material as the material moves through the interior.06-30-2011
20120012317Solid Zirconium-Based Cross-Linking Agent and Use in Oil Field Applications - A solid zirconium cross-linking agent and use in a cross-linking composition in oil field applications such as hydraulic fracturing and plugging of permeable zones. The zirconium cross-linking agent is prepared by a process comprising contacting a zirconium complex with an alkanolamine and water at particular mole ratios of alkanolamine and water to zirconium.01-19-2012
20120012315LOW DENSITY CEMENTITIOUS COMPOSITIONS USING LIMESTONE - A manufactured cementitious binder includes a hydraulic binder in an amount in the range of from 40 to 75% by weight of the cementitious binder; metakaolin in an amount in the range of from 1 to 30% by weight of the cementitious binder; silica fume in an amount up to 15% by weight of the cementitious binder; limestone in an amount of from 5 to 30% by weight of the cementitious binder, and a cementitious accelerator in a controlled amount of at least 0.5% by weight of the cementitious binder, the cementitious binder providing a cementitious settable composition when added with water, wherein for a density lower than 13 pounds per gallon and of at least 11 pounds per gallon obtained without a lightweight additive, said cementitious settable composition exhibits a 24 hour compressive strength at 100 F, as hardened, of at least 500 psi.01-19-2012
20120012314LOW DENSITY CEMENTITIOUS COMPOSITIONS USING LIME KILN DUST - A manufactured cementitious binder including a hydraulic binder in an amount in the range of from about 40 to 75% by weight of the cementitious binder; metakaolin in an amount in the range of from about 1 to 30% by weight of the cementitious binder; silica fume in an amount up to about 15% by weight of the cementitious binder; lime kiln dust in an amount of from about 5 to 30% by weight of the cementitious binder, and a cementitious accelerator in an amount greater than about 0.1% by weight of the cementitious binder, wherein the cementitious binder provides a cementitious settable composition, when added with water and without a lightweight additive, that has a density lower than about 13 pounds per gallon and greater than about 11 pounds per gallon and a 24 hour compressive strength at 100 F, as hardened, of at least 500 psi.01-19-2012
20120012316Solid Zirconium-Based Cross-Linking Agent and Use in Oil Field Applications - A solid zirconium cross-linking agent is prepared comprising zirconium and hydroxyalkylated ethylene diamine ligand. Use of the cross-linking agent in compositions for oil field applications such as hydraulic fracturing and plugging of permeable zones is also disclosed.01-19-2012
20120205103Cement Slurry Monitoring - Various disclosed cement slurry monitoring methods include monitoring one or more parameter of the cement slurry at various positions along the borehole during the curing process and responsively identifying a span over which the slurry extends and whether there are any gaps or voids in that span. At least some system embodiments include a distributed sensing arrangement to provide parameter measurements as a function of position and time during the curing process. A computer analyzes the measurements to determine the span of the cement slurry and whether any gaps exist. Contemplated measurement parameters include temperature, pressure, strain, acoustic spectrum, acoustic coupling, and chemical concentration. Individually or in combination, these measurements can reveal in real time the state of the cement slurry and can enable remedial actions to be taken during or after the curing process if needed to address deficiencies in the annular seal being provided by the cement.08-16-2012
20100096132Methods and Devices for Forming a Wellbore with Casing - A method for cementing a tubular in a wellbore in a subterranean formation, according to one or more aspects of the present disclosure, comprises connecting a circulating tool to a slip and a top drive; gripping a first tubular with the slip above the surface of the wellbore; sealingly engaging the first tubular with a seal member; fluidly connecting a wiper plug to the circulating tool; connecting the first tubular to a second tubular; and lowering the second tubular into the subterranean formation.04-22-2010
20100096131Wiper Plug Perforating System - A method and system for cementing and perforating a wellbore in a single step by coupling a perforating gun with a wiper plug. The method includes injecting cement in a wellbore having casing therein and an annulus between the casing and wellbore. A wiper plug is dropped on the cement having a perforating gun attached to the wiper plug. The plug is forced downward pulling the perforating gun along. The downward motion of the plug in turn pushes the cement out the bottom end of the casing and into the annulus. The cement in the annulus is allowed to set and the perforating gun is activated.04-22-2010
20120247766GEOTHERMAL GROUT, METHODS OF MAKING GEOTHERMAL GROUT, AND METHODS OF USE - The present disclosure relates to geothermal grout, methods of making geothermal grout, and methods of using geothermal grout. The present disclosure is further directed to an geothermal grout with relative ease of preparation and desirable thermal conductivity while maintaining good sealant properties.10-04-2012
20100206566One Trip Cemented Expandable Monobore Liner System and Method - An apparatus to protect the mounting area of casing and a locating profile and optionally a sliding sleeve valve and a flow path from the outside of the valve to the annulus when subsequent attachment of an expanded liner is intended and the expanded liner is to be cemented in place. A barrier sleeve, nose, and outer sleeve define a sealed cavity having a loose incompressible material inside that covers the mounting location on the casing. A locating profile and an optional sliding sleeve valve and a flow path from the outside of the valve to the annulus can be provided. The cementing of the casing takes place through the barrier sleeve. After the cementing, the sleeve and nose are drilled out and the incompressible material is removed to the surface with the drill cuttings. A liner is inserted in the casing and is preferably expanded into sealing contact with the mounting location on the casing. After expansion a cement retainer positioned at the bottom of the expanded liner and the sliding sleeve located either above the mounting location of the liner in the casing shoe or in the liner below the mounted top section allow cement to be delivered outside the expanded liner and the displaced wellbore fluid to return into the casing through so that the liner can be cemented. The cement retainer can be delivered with either the liner or the expansion tools to allow expansion and cementing in a single trip. A shifting tool can be run on the expansion string to actuate the sliding sleeve and if necessary to allow for cement to be pumped from the drill string into the annulus through the sliding sleeve. The cement retainer can be milled out in a separate trip.08-19-2010
20120132424METHOD OF DRILLING FROM A SHAFT FOR UNDERGROUND RECOVERY OF HYDROCARBONS - The present invention discloses a selection process for installing underground workspace in or near a hydrocarbon deposit that is an appropriate workspace from which to drill, operate and service wells applicable to any of a number of methods of recovering hydrocarbons. The present invention includes a number of innovative methods for developing workspace for drilling from a shaft installed above, into or below a hydrocarbon deposit, particularly when the hydrocarbon reservoir is at significant formation pressure or has fluids (water oil or gases) that can enter the workspace. These methods can also be used for developing workspace for drilling from a tunnel installed above, into or below a hydrocarbon deposit. The present invention also discloses a procedure for evaluating the geology in and around the reservoir and using this information to select the most appropriate method of developing workspace for drilling from a shaft and/or tunnel.05-31-2012
20120160489CEMENT SLURRY WITH LOW WATER-TO-CEMENT RATIO - A cement slurry comprising a mixture of a cement blend and water, wherein the cement blend comprises at least about 70% by volume of blend of cementitious particulate material and water is present in the mixture in an amount of not more than 50% by volume of the slurry.06-28-2012
20120160488METHOD AND APPARATUS FOR PRESSURE TESTING A TUBULAR BODY - An apparatus for pressure-testing a tubular body may be installed in the tubular-body interior. The apparatus comprises an activation-device seat, one or more bypass ports, a J-slot with an indexing pin and a spring. When an activation device, for example a ball, lands in the activation-device seat, fluid communication through the tubular body is blocked, allowing pressurization. During pressurization, the activation-device seat moves downward, causing the spring to compress and the indexing pin in the J-slot to move to the bottom position. Upon depressurization after the test, the activation-device seat moves upward, causing to spring to decompress and the indexing pin the J-slot to move to the top position. Upward movement of the activation-device seat unblocks the bypass ports, thereby reestablishing fluid communication through the tubular body. The tubular body may be drillpipe, casing or coiled tubing that is installed in the borehole of a subterranean well.06-28-2012
20100012319PLUG AND METHOD FOR ESTABLISHING SUCH PLUG INSIDE A PIPE - The invention concerns a method for establishing a plug inside a main pipe, in particular a vertically or slantingly arranged pipe, where said pipe has firs and second ends, and where the plug is arranged inside the pipe at a distance from said first and second ends, where a liquid surface is provided at least inside the pipe, below the level at which it is desirable to establish the plug, where a buoyant layer is established on top of said liquid surface, and where a plug material is placed on top of ‘said buoyant layer as well as a plug established according to the method. The buoyant layer can be granular, liquid or solid material. The plug is made of foam material, expandable material or cement-based material such as concrete.01-21-2010
20120255733HYPER-FINE CEMENT - A process for sealing or strengthening porous molded articles, rock or porous informations. The process comprises using hyper-fine cement having a particle size D10-11-2012
20120073814EXPANSION AGAINST CEMENT FOR ZONAL ISOLATION - A method for improving zonal isolation between formations along a borehole, comprises a) providing a pipe in the borehole, wherein at least a portion of the pipe lies between the formations, b) providing a body of cement in the annulus between the borehole wall and said pipe portion, c) allowing the body of cement to cure until it has reached at least 70 Bearden units consistency, and d) expanding said pipe portion so as to decrease the cross-sectional area of the annulus between the borehole wall and said pipe portion.03-29-2012
20120073813Novel Weight Materials for Use in Cement, Spacer and Drilling Fluids - A drilling fluid, spacer fluid and cementing compositions for use in subterranean wells are disclosed along with methods for making using same, where the compositions include a weighting system having an effective amount of a metal silicon alloy, mixtures of metal silicon alloys, or mixtures of metal silicon alloys and conventional weighting agents, to produce compositions having a desired high density, while retaining other fluid properties such as pumpability, gas tight sealing, low tendency to segregate, and reduced high temperature cement strength retrogression.03-29-2012
20120267106Pumpable Geopolymers Comprising A Setting Accelerator - The invention concerns the use of a carbohydrate-based compound as a setting accelerator in a pumpable geopolymeric suspension for oil and/or gas industry applications, said suspension further comprising ‘an aluminosilicate source, a carrier fluid, and an activator, and methods of preparing such suspensions. In particular, the suspension according to the invention is used for well primary cementing operations and/or remedial applications.10-25-2012
20120186813METHOD FOR BLOCKING OUTFLOW OF PETROLEUM OR THE LIKE DUE TO DAMAGE TO SUBSEA PETROLEUM WELL STELL PIPE OR THE LIKE - The present invention relates to blocking a flow of crude oil or natural gas from a steel pipe for extracting the oil or the like that has been installed in the sea when the steel pipe is broken. When damage occurs to a steel pipe 07-26-2012
20120186812MODIFIED CEMENT COMPOSITION, PREPARATION AND APPLICATION THEREOF - Light to ultra-light cement compositions with modified rheological properties. The cement composition includes cement, hydrophobic nano-silica, at least one additive and a sufficient amount of water to make a cement slurry with high compressive strength, low porosity, low free water, and low fluid loss with a quick thickening time.07-26-2012
20090020285Reverse-Circulation Cementing of Surface Casing - An apparatus for reverse circulation cementing of surface casing in subterranean formations and associated methods are provided. One example of a method may involve a method of reverse circulation cementing a surface casing in a well bore with a conductor casing positioned therein comprising: providing a tool comprising at least one isolation device coupled to the surface casing; positioning the isolation device in the well bore to isolate an annulus between the surface casing and the conductor casing; flowing cement through a port in the conductor casing in a reverse circulation direction; and allowing the cement to set therein.01-22-2009
20120227969External Casing Packer - A method and apparatus for cementing a zone of borehole casing using an external casing packer (ECP). The method involves sealing the base of the ECP with a ball dropped in a seat, and then pressurising the casing to inflate an elastomeric packer sleeve through a one-way valve. When a design differential pressure is reached across the casing and elastomeric sleeve, a grout valve in the upper part of the packer opens to limit the sleeve inflation pressure and to provide a one-way valve through which cement grout passes to permit grouting of the annulus between the casing and the borehole.09-13-2012
20110120714Method and System for Cementing - A valve system for cementing including a valve and a sleeve shifter. The valve may have a moveable sleeve with openings and a housing situated about the moveable sleeve and having flow passages. The sleeve shifter may be configured to be opened and/or closed multiple times. The valve may be used in reverse cementing and/or squeeze jobs.05-26-2011
20120298358Method for quantifying cement blend components - Disclosed herein is a method of servicing a wellbore comprising the steps of preparing a dry cement blend comprising a base cement and a crystalline component wherein the dry cement blend is based on an initial dry cement blend formulation, obtaining a diffraction pattern of a sample of the dry cement blend, generating a model diffraction pattern, refining the model diffraction pattern using a structural refinement method, determining the type and amount crystalline components present in the dry cement blend, generating a final dry cement blend formulation, and comparing the initial dry cement blend formulation to the final dry cement blend formulation.11-29-2012
20110048710Method and apparatus for performing cementing operations on top drive rigs. - A remotely operated lifting top drive cement head is provided having a high tensile strength, as well as the ability to swivel or rotate about a central vertical axis. The cement head permits selective launching of darts, setting plugs, balls or other objects which can be held in place within the cement head without being damaged or washed away by slurry flow, but which can be beneficially launched into said slurry flow at desired point(s) during the cementing process. The internal components of the cement head can be easily accessed using interrupted thread connections that can be quickly and easy connected and disconnected in the field without requiring specialized equipment. The cement head can be rigged up and remotely operated without requiring the lifting of personnel off the rig floor to actuate the tool or observe tool status.03-03-2011
20100230102Methods of Extending the Shelf Life of and Revitalizing Lightweight Beads for Use in Cement Compositions - In an embodiment, the shelf life of lightweight beads to be used in a cement composition may be extended by combining the lightweight beads with a fluid such as water to inhibit the lightweight beads from forming an agglomeration while they are being stored or transported. In another embodiment, lightweight beads that have already formed an agglomeration may be revitalized for use in a cement composition by adding a fluid such as water to the lightweight beads to reduce a size of the agglomeration. The agglomeration may originally have a width greater than or equal to about 1 inch. Adding the fluid to the lightweight beads may cause at least a portion of the beads to separate from the agglomeration into individual beads having a width of less than or equal to about 200 microns.09-16-2010
20100230101METHOD AND APPARATUS TO CEMENT A PERFORATED CASING - The invention discloses an apparatus (09-16-2010
20100230100Plug for a Perforated Liner and Method of Using Same - A plug for insertion into a perforation in a liner or tubular. The plug comprises a base portion and one or more extendible portions. The base portion is securable to and receivable within the perforation. The base portion and the one or more extendible portions seal the perforation in the liner. The one or more extendible portions have a retracted position and an extended position such that when in their extended position the one or more extendible portions extend outwardly from the base portion and outwardly from the exterior surface of the liner.09-16-2010
20120325475CEMENTING TOOL - A cementing tool (12-27-2012
20120279706METHOD AND DEVICE FOR CLOSING A WELL - A method and device close a well with a casing in a formation in the ground are provided. The method has the steps of moving a cutting tool down into the well; removing a longitudinal portion of the casing by cutting the longitudinal portion into pipe wall pieces; removing the cutting tool; and setting a plug against the formation in the longitudinal portion from which the casing has been removed.11-08-2012
20120279705LINER CEMENTATION PROCESS AND SYSTEM - Present embodiments are directed to coupling a cementation assembly with a hung or set liner string in a well and moving the liner string during a cementation operation. Specifically, for example, a process in accordance with present techniques includes running a cementation assembly into a well on drill pipe and engaging, with a distal end of the cementation assembly, a liner top assembly of a liner string that is positioned downhole in the well, wherein the liner string was previously positioned downhole in the well without being cemented into the well. Further, the process includes latching the cementation assembly with the liner string such that movement of the cementation assembly is translated to the liner string, and flowing cement through the drill pipe and into the liner string while moving the cementation assembly and the liner string.11-08-2012
20120138297Cementing Method and Apparatus for Use with Running String Having an Obstruction - A cementing assembly is mounted to a lower end of a running string. The running string has an obstruction in it such as a cable preventing a wiper dart from passing through. A production string liner wiper plug is secured to the running tool with a shear pin or other device. A dart is temporarily suspended above the liner wiper plug in a manner that cement can be pumped around the dart and through an open bore in the wiper plug. Picking up to let dogs extend followed by setting down releases the dart. Picking up again exposes a lateral port to circulate out contaminated cement. Setting down closes the port and pressure launches the plug to push the cement into the annulus surrounding the string being run in. A passage without restrictions results at the top of the cemented string after the running tool is pulled out of the hole.06-07-2012
20130008653WELLBORE LASER OPERATIONS - Methods, systems, and devices related to downhole wellbore operations such as drilling and completing wells in an earth formation include a laser device.01-10-2013
20130020083INVERT EMULSION DRILLING FLUID CONTAINING A HYGROSCOPIC LIQUID AND A POLYMERIC SUSPENDING AGENT - According to an embodiment, an invert emulsion drilling fluid comprises: an external phase, wherein the external phase of the drilling fluid comprises a hydrocarbon liquid; an internal phase, wherein the internal phase of the drilling fluid comprises a hygroscopic liquid; and a suspending agent, wherein the suspending agent is a polymer comprising urea linkages or urea and urethane linkages. According to certain embodiments, the hygroscopic liquid comprises a salt and a suitable solvent. According to other embodiments, the hygroscopic liquid comprises an alcohol. In certain embodiments, the drilling fluid does not contain an organophilic clay or organophilic lignite. According to another embodiment, a method of using the invert emulsion drilling fluid comprises: introducing the drilling fluid into at least a portion of a subterranean formation.01-24-2013
20120241154SLIDING STAGE CEMENTING TOOL - A downhole tool provided within a casing string for use in cement staging operations. The tool includes an inflatable packer that is integral to the body of the tool and ports in sides of the tool. The ports are selectively opened and closed for circulating cement from within the tool so that cement can flow between the casing string and a wellbore. The ports are actuated by sliding the casing string upward or downward within the wellbore. The packer can be pressure tested after being set to ensure its efficacy.09-27-2012
20080251253Method of cementing an off bottom liner - A method of cementing an off bottom liner including the steps of establishing a first flow blockage in the liner at a location down-hole of a cementing valve located in the side wall of the liner, opening the cementing valve which exposes openings in the sidewall of the liner, pumping cement down the liner and out through the openings in the sidewall of the liner, establishing a second flow blockage up-hole of the cementing valve, closing the cementing valve, opening the second flow blockage to establish fluid communication through the second flow blockage, and opening the first flow blockage to establish fluid communication through the first flow blockage. The steps of opening the first and second flow blockages are achieved by increasing the pressure in the liner above the blockages. In this way, it is possible to cement an off bottom liner and regain fluid communication to the wellbore below the liner without the need for any drilling operations.10-16-2008
20080230224Spear Type Blow Out Preventer - A blow out preventer for operating between a spear of a tubular gripping tool and a tubular gripped by the tool includes: an expandable seal carried on the spear and expandable to seal between the spear and the tubular's inner wall, the expandable seal being operable as a back up to a primary seal operable between the spear and the tubular's inner wall. A tubular gripping tool and a method may include the blow out preventer.09-25-2008
20080223575CASING AND LINER DRILLING BITS AND REAMERS, CUTTING ELEMENTS THEREFOR, AND METHODS OF USE - A casing bit, which may comprise a composite structure, for drilling a casing section into a subterranean formation, and which may include a portion configured to be drilled therethrough, is disclosed. Cutting elements and methods of use are disclosed. Adhesive, solder, electrically disbonding material, and braze affixation of a cutting element are disclosed. Differing abrasive material amount, characteristics, and size of cutting elements are disclosed. Telescoping casing sections and bits are disclosed. Aspects and embodiments are disclosed including: at least one gage section extending from the nose portion, at least one rotationally trailing groove formed in at least one of the plurality of blades, a movable blade, a leading face comprising superabrasive material, at least one of a drilling fluid nozzle and a sleeve, grooves for preferential failure, at least one rolling cone affixed to the nose portion, at least one sensor, discrete cutting element retention structures, and percussion inserts.09-18-2008
20130175034DRILL HOLE PLUGS - A grout plug 07-11-2013
20130168090APPARATUS AND METHOD FOR FLUID TREATMENT OF A WELL - A wellbore fluid treatment apparatus includes a tubing string including a first port with a first closure disposed thereover to close the first port to fluid flow and a second port spaced axially uphole from the first port and having a second closure disposed thereover to close the second port to fluid flow; and an actuator tool configured to move through the tubing string and (i) to set a seal in the tubing string downhole of the first port; (ii) to actuate the first closure to open the first port; and (iii) to actuate the second closure to open the second port. A method for treating a well may employ the tool.07-04-2013
20100012320METHODS AND APPARATUS FOR CEMENTING DRILL STRINGS IN PLACE FOR ONE PASS DRILLING AND COMPLETION OF OIL AND GAS WELLS - The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are described that provide for the efficient installation of a cemented steel cased well wherein the drill string and the drill bit are cemented into place during one single drilling pass down into the earth. Methods of operation are described wherein at least one geophysical parameter is measured with a geophysical parameter sensing member located within the drill string. A one-way cement valve is installed near the drill bit of the drill string that allows the cement to set up efficiently under ambient hydrostatic conditions while the drill string and drill bit are cemented into place during one single drilling pass into the earth.01-21-2010
20130126165WELLBORE LATERAL LINER PLACEMENT SYSTEM - A system has been invented for placement of a liner in a lateral wellbore, access to which is provided through a window having a V-shaped downhole end. The system includes a running tool including an upper end through which the running tool is manipulated from surface, a lower end, a key positioned between the upper end and the lower end, the key protruding from the running tool for locating the V-shaped down-hole end of the window and a liner-engaging portion on the downhole end for releasably securing the wellbore liner to the running tool, the liner-engaging portion configured to secure the liner adjacent the key with the key protruding above the liner and the liner extending from the lower end. The invention also provides methods for placing a wellbore liner in a lateral well-bore extending from a main wellbore.05-23-2013
20080202751Methods and Devices for Forming a Wellbore with Casing - An example of a method for cementing a casing within an earthen formation includes the steps of providing a gripping mechanism connected to a cementing assembly and a top drive; gripping the casing with the gripping mechanism; sealingly engaging the casing with a seal member; moving the casing to a position within the formation; and cementing the casing within the formation while maintaining a gripping and sealing engagement of the casing. The step of cementing may also include the step of remotely releasing a plug into the casing from the cementing assembly.08-28-2008
20100294496LOW DENSITY CEMENTITIOUS COMPOSITIONS - A manufactured cementitious binder including a hydraulic binder in an amount in the range of from about 40 to 75% by weight of the cementitious binder; metakaolin in an amount greater than about 5% by weight of the cementitious binder; silica fume in an amount up to about 15% by weight of the cementitious binder; and cement kiln dust in an amount greater than about 10% by weight of the cementitious binder, the cement kiln dust including chlorine in an amount of at least 0.1% by weight of the cement kiln dust, the cementitious binder providing a cementitious settable composition, when added with water and without a lightweight additive, that has a density lower than about 13 pounds per gallon and greater than about 11 pounds per gallon and a 24 hour compressive strength at 100 F, as hardened, of at least 500 psi.11-25-2010
20100307751CEMENT DIFFUSER FOR ANNULUS CEMENTING - A cement diffuser and method for allowing a ported tubular to be cemented in place, while keeping an annulus about a port of the ported tubular generally free of set cement. The cement diffuser includes a collection of fibers secured over the port and extending out from an outer surface of the tubular.12-09-2010
20100307750SQUEEZE COMPOSITION FOR RESTORING ISOLATION - The invention discloses a method of treating a wellbore, comprising the step mixing an alkali swellable polymer and a first material, wherein said first material does not cause said alkali swellable polymer to swell significantly; and placing said alkali swellable polymer and said first material in the wellbore.12-09-2010
20120273199Nitinol Through Tubing Bridge Plug - A bridge plug assembly having a nickel titanium alloy flexible member that can be selectively radially expanded so its outer surface sealingly engages a surrounding tubular. The flexible member can comprise an annular membrane like member having coaxial rings on the opposing ends of the flexible member. The percentage of weight of nickel can range up to about 40 to about 58%, 55% or to about 60%.11-01-2012
20130153219PLUG AND ABANDONMENT SYSTEM - A system to set a plug in a wellbore includes a tubular member and a plug coupled to the tubular member. The plug is configured to seal a wellbore based, at least in part, on a shape change of the plug.06-20-2013
20130153220EXPANDABLE SEAT ASSEMBLY FOR ISOLATING FRACTURE ZONES IN A WELL - An expandable fracture ball seat assembly for use in wellbore zone fracturing operations functions to permit passage therethrough and exit therefrom of fracture ball plugs of only diameters less than a predetermined magnitude. In a representative form, the seat assembly includes a ring stack disposed within a tubular member and formed from a first expandable ring coaxially sandwiched between a setting ring and a second expandable ring. When an oversized fracture ball plug is forced into the seat assembly it axially compresses the ring stack and reduces the diameter of the first expandable ring and telescopes it into the second expandable ring, with the first expandable ring and the setting ring blocking passage through and exit from the seat. A reverse passage of a suitably large diameter fracture ball plug through the seat assembly axially returns the setting ring and first expandable ring to their original positions.06-20-2013
20130153221Compositions and Methods for Well Completions - Incorporation of carbonaceous materials in a cement slurry increases the linear thermal-expansion coefficient of the set cement. When placed in a subterranean well having at least one casing string, cement sheaths with linear thermal-expansion coefficients similar to that of the casing will be subjected to lower compressive and tensile stresses during downhole-temperature changes. Such cement slurries are particularly advantageous in the context of thermal-recovery wells.06-20-2013
20130180715Methods and apparatus for cementing wells - Return flow diverters are provided for which are adapted to allow return flow during cementing of a liner for a well. The return flow diverter comprises a cylindrical body adapted for installation in a well as part of the liner. The cylindrical body has a fluid port therein adapted to allow fluids displaced by a cementing operation to flow from an annulus between the liner and the well into the cylindrical body. The return flow diverter also comprises a cover supported on the cylindrical body for movement from an open position, in which the port is open, to a closed position, in which the port is closed by the cover, a transmission disposed within the cylindrical body and defining a cylindrical passageway adapted to accommodate a tubular conduit.07-18-2013
20130186626SUBTERRANEAN WELL INTERVENTIONLESS FLOW RESTRICTOR BYPASS SYSTEM - A method of variably restricting flow in a subterranean well can include resisting flow through a flow path, and then selectively opening a pressure barrier which previously prevented flow through another flow path. The flow paths are configured for parallel flow. A flow restrictor system for use with a subterranean well can include at least two flow paths configured for parallel flow, a flow restrictor which resists flow through one flow path, and a pressure barrier which prevents flow through another flow path. The pressure barrier is selectively openable to permit flow through the second flow path.07-25-2013
20130098614VARYING PORE SIZE IN A WELL SCREEN - A method can include applying a magnetic field to a well screen, thereby varying sizes of pores via which fluid flows through the well screen. A well screen can include a magnetic shape memory material having a dimension which changes in response to application of a magnetic field. Restriction to flow through the well screen can vary in response to the change in dimension of the magnetic shape memory material.04-25-2013
20130206410EXPANDABLE STRUCTURES FOR WELLBORE DEPLOYMENT - The subject disclosure relates to expandable structures that seal and block cross-sections of a wellbore. In an embodiment, the apparatus comprises a plurality of structure plates and at least one expandable structure, the apparatus operable to change a perimeter diameter and block a cross-section when deployed.08-15-2013

Patent applications in class Cementing, plugging or consolidating

Patent applications in all subclasses Cementing, plugging or consolidating