| Entries |
| Document | Title | Date |
|---|
| 20090084551 | Reducing pipe expander - A reducing pipe expander that applies to casing deformation restoration of deep wells such as oil field and comprises a conical-nosed enclosure, a mandrel and several steel balls. The main body of the enclosure is equipped with several radial slotted holes to nest steel balls. Held by a taper, slant or curved face against insides of the slotted holes, the steel balls move axially, overhanging the enclosure. When the deformed casing pipe or patching pipe obstructs the pipe expander from moving forward, the steel balls will move in the reverse direction of the movement of the expander to directly expand the deformed pipe. When the expander can pass through the casing pipe or patching pipe, the steel balls will be free to return to their original status. | 04-02-2009 |
| 20120168162 | Non frangible perforating gun system - A shaped charge assembly for use in a perforating gun that further comprises a charge carrier, and gun housing. The charge carrier substantially encapsulates the closed portion of the shaped charge and extends from the outer periphery of the shaped charge to the inner diameter of the associated gun housing. Encapsulating the shaped charge substantially reduces the introduction of debris into the wellbore resulting from detonation of the perforating gun shaped charges. The charge carrier can include a multiplicity of shaped charges therein. | 07-05-2012 |
| 20130037268 | TELESCOPIC LASER PURGE NOZZLE - A method and apparatus for wellbore perforation in which a laser beam at a downhole location of a wellbore is directed to a target area of a wellbore wall to be perforated. The laser beam is guided through a longitudinally extensible nozzle onto the target area and a purge fluid is introduced into the longitudinally extensible nozzle, thereby longitudinally extending the nozzle toward the target area. The purge fluid in the longitudinally extensible nozzle is passed through a purge fluid outlet of the nozzle onto the target area, thereby removing debris from the target area generated by the laser beam. | 02-14-2013 |
| 20130081814 | Apparatus and Method for Galvanically Removing From or Depositing Onto a Device a Metallic Material Downhole - In one aspect, a method of performing a wellbore operation is disclosed that in one embodiment may include: deploying a device in the wellbore containing a conductive fluid, wherein the device is configured to disintegrate upon application of electrical current thereto; and applying current to the device in the wellbore using a tool to controllably disintegrate the device. In another aspect, an apparatus for use downhole is provided that in one embodiment may include a device placed at a selected location in a wellbore, wherein the device is made from a material that disintegrates when electric current is induced in to device and a tool placed proximate to the device configured to induce electric current into the device to cause the device to disintegrate. | 04-04-2013 |
| 20100044044 | CONTROLLING TRANSIENT UNDERBALANCE IN A WELLBORE - A method of perforating a well includes selecting a desired transient underbalanced condition, configuring a perforating gun string to achieve the transient underbalanced condition, deploying the perforating gun is a wellbore, and firing the perforating to achieve the transient underbalanced condition. | 02-25-2010 |
| 20090151949 | DEBRIS-FREE PERFORATING APPARATUS AND TECHNIQUE - An apparatus that is usable with a well includes a perforating system that is adapted to be fired downhole in the well. The perforating system includes a component, which includes an alloy that has a negative corrosion potential and is unable to passivate, or self-protect, while deployed in the well. The component is adapted to disintegrate to form substantially no debris in response to the firing of the perforating system. | 06-18-2009 |
| 20090159285 | DOWNHOLE INITIATOR - A perforating gun that is usable with a well includes at least one perforating charge and a initiator. The initiator includes an explosive ballistic train to the perforating charge(s). The initiator is adapted to physically misalign components of the ballistic train to prevent inadvertent firing of the perforating charge(s) and physically realign the components to arm the ballistic train. | 06-25-2009 |
| 20090159284 | SYSTEM AND METHOD FOR MITIGATING SHOCK EFFECTS DURING PERFORATING - A technique enables the mitigation of detrimental forces created during perforation procedures. Charges are mounted in a perforating gun at an angle that eliminates at least some of the detrimental forces. The charges are tilted relative to an axis of the perforating gun, and this mitigates the detrimental forces and reduces the potential for damaging the perforating gun and other associated equipment during a perforation procedure. | 06-25-2009 |
| 20090159283 | SIGNAL CONDUCTING DETONATING CORD - A downhole perforating device includes: a perforating gun having incorporated therein at least two shape charges; an elongated detonating cord incorporated with the perforating gun and extending along a length of the perforating gun, the detonating cord including: a flexible jacket surrounding an explosive; and a communication medium extending within or attached onto the flexible jacket layer. | 06-25-2009 |
| 20080230225 | Perforators - A carrier for at least one shaped charge, the carrier being disposable in use within an oil, gas, water or steam well bore. The carrier comprises a housing at least partially formed from a composite material which is non-frangible in normal use. The composite material component of the housing is arranged substantially to contain debris created within the carrier as a result of firing of the at least one shaped charge. The housing may be entirely of composite material or may comprise in inner metallic housing and an outer overwrap of composite material. | 09-25-2008 |
| 20120181026 | PERFORATING GUN WITH VARIABLE FREE GUN VOLUME - A method of adjusting a pressure reduction to occur in a wellbore following firing of at least one perforating gun can include determining a desired free gun volume which corresponds to a desired pressure reduction in the wellbore resulting from firing of the perforating gun, and varying a free gun volume of the perforating gun until the free gun volume is substantially the same as the desired free gun volume. A well system can include at least one perforating gun positioned in a wellbore, the perforating gun comprising multiple perforating charges and a free gun volume, and the free gun volume being reduced by presence of a flowable material about the multiple perforating charges. | 07-19-2012 |
| 20100132945 | Method for Perforating a Wellbore in Low Underbalance Systems - By substantially eliminating the crushed zone surrounding a perforation tunnel and expelling debris created upon activation of a shaped charge with first and second successive explosive events, the need for surge flow associated with underbalanced perforating techniques is eliminated. The break down of the rock fabric at the tunnel tip, caused by the near-instantaneous overpressure generated within the tunnel, further creates substantially debris-free tunnels in conditions of limited or no underbalance as well as in conditions of overbalance. | 06-03-2010 |
| 20130062063 | COMPLETING A MULTI-STAGE WELL - A technique includes running a seat assembly on a conveyance line into a tubing string, which has previously been installed in a well. The seat assembly includes a seat, which is adapted to receive an untethered object. The technique includes attaching the seat assembly to the string at a location downhole in the well; receiving the object to create a fluid barrier; and diverting fluid using the fluid barrier. | 03-14-2013 |
| 20130068461 | SEALING BODY FOR WELL PERFORATION OPERATIONS - A sealing body is provided for use in well operations such as oil/gas well perforation operations. The sealing body comprises a shell defining a closed cavity; the shell is comprised of a metal alloy. The sealing body has neutral or positive buoyancy. In one embodiment, the sealing body further comprises a reinforcement structure in the cavity. The reinforcement structure may comprise one or more pairs of ribs adjoining an inner surface of the shell of the sealing body. | 03-21-2013 |
| 20120234542 | METHOD AND SYSTEMS TO SEVER WELLBORE DEVICES AND ELEMENTS - A method for performing an operation in the wellbore may include at least partially separating a wellbore tubular while reducing a compression in a section of the wellbore tubular using a force applicator in the wellbore. An apparatus for performing the downhole operation may include a cutter configured to at least partially sever a wellbore tubular; and a force applicator configured to reduce a compression in a section of a wellbore tubular proximate to the cutter. | 09-20-2012 |
| 20110042089 | OPENHOLE PERFORATING - An underbalanced perforating system is disclosed for use in openhole completions to maximize the wellbore and matrix cleanup efficiency, to connect natural fracture patterns, and/or to enable application of new drilling fluid technology in difficult subsurface environments. The perforating system can be used for any hydrocarbon bearing formations with any lithology. | 02-24-2011 |
| 20110278007 | TOOL AND METHOD FOR PROVIDING ACCESS TO A WELLHEAD ANNULUS - A system and method for accessing an annulus within a wellhead assembly while the annulus is pressurized. The system includes a tubular body with an attached valve assembly and adapter. The adapter to the wellhead assembly with a sealed annular fitting. The body houses a selectively extendable plunger assembly rotatable by an attached motor. A bit or milling device is provided on the end of the plunger assembly, so that selectively extending the plunger assembly through the valve assembly and adapter contacts the bit against the wellhead assembly. An opening is formed through the wellhead assembly with the rotating bit allowing access to the annulus. | 11-17-2011 |
| 20110127035 | METHOD OF ABANDONING A PETROLEUM WELL - The present invention relates to a method of abandoning a petroleum well ( | 06-02-2011 |
| 20110272157 | Slot Perforating Tool - An apparatus including a body, a mandrel disposed at least partially within the body, and a spring. The spring maintains the mandrel in a retracted position within the body until a predetermined pump rate is applied. The spring allows the mandrel to move to an extended position when the predetermined pump rate is applied. The spring returns the mandrel to the retracted position within the body when the predetermined pump rate is removed. | 11-10-2011 |
| 20110290486 | Well Treatment Device, Method, and System - System, devices, and methods are described relating to the treatment (e.g., perforating, fracturing, foam stimulation, acid treatment, cement treatment, etc.) of well-bores (e.g., cased oil and/or gas wells). In at least one example, a method is provided for treatment of a region in a well, the method comprising: positioning, in a well-bore, a packer above the region of the well-bore, fixing, below the region, an expansion packer, treating the region, the treatment fixing the packer, moving the expansion packer, and moving the packer after the moving of the expansion packer. | 12-01-2011 |
| 20090151948 | DEVICE AND METHOD FOR REDUCING DETONATION GAS PRESSURE - A perforating gun, having a gun carrier extending in a longitudinal direction; a loading tube located within the gun carrier, the loading tube extending in the longitudinal direction; a shape charge being supported by the loading tube, the shape charge having a casing, an explosive, and a liner, the casing opening in a first direction and having a centerline extending in the first direction, the first direction being essentially perpendicular to the longitudinal direction; and a liquid implant, the liquid implant being located adjacent to the shape charge in the first direction and intersecting the centerline. | 06-18-2009 |
| 20080264639 | Method and Apparatus for Orienting Perforating Devices - The present invention provides an apparatus and method of orienting perforating gun strings conveyed on a tool string. One embodiment of the present invention provides an orienting weight provided in a portion of the perforating device, such as the shaped charge, the loading tube or the gun housing. An adapter is provided intermediate the tool string that facilitates conveyance of the gun string downhole. Additionally, the adapter enables the gun string to rotate independent of the tool string. | 10-30-2008 |
| 20080210425 | CONNECTOR FOR PERFORATING GUN TANDEM - A perforating gun connector comprising a first and second section connected together on one end. The two sections of the perforating gun connector that couple together are correspondingly tapered so that one end of one connector is tapered and fits into the corresponding tapered hollowed section of one end of the other section. The present invention also provides for the inclusion of shaped charges and booster charges within. Adjacent the charges are sealing bulkheads. | 09-04-2008 |
| 20090211759 | Methods and Devices for Treating Multiple-Interval Well Bores - Methods and devices are provided for treating multiple interval well bores. More particularly, an isolation assembly may be used to allow for zonal isolation to allow treatment of selected productive or previously producing intervals in multiple interval well bores. One example of a method for treating a multiple interval well bore includes the steps of: introducing an isolation assembly to a well bore, the isolation assembly comprising a liner, one or more sleeves and a plurality of swellable packers, wherein the sleeves and swellable packers are disposed about the liner; deploying a shifting tool inside the liner, where the sleeves are configured so as to provide open, closed and open to screen positions when actuated by the shifting tool. An open position allows for treatment of the well bore while an open to screen position allows for receiving fluid from the well bore. A closed position re-establishes zonal isolation. | 08-27-2009 |
| 20090050321 | Oil well perforators - An oil and gas well shaped charge perforator is provided comprising a housing, a high explosive, and a liner with a further insert liner where the high explosive is positioned between the liner and the housing. In use the high explosive will collapse the liner and insert causing two cutting jets to form. The insert may substantially cover the surface area of the liner or it may over only partially cover the liner, such as the apical portion of the liner or the base portion of liner. Alternatively the insert may be varied in thickness across the surface area of the liner. Typically the thickness of the liner may be between 1 and 10% of the liner diameter and the thickness of the insert may be between 1 and 200% of the thickness of the liner. The insert may be produced during the manufacture of the liner, but preferably the liner will be a retro fitted item. | 02-26-2009 |
| 20080236828 | Tubular cutting device - The pipe cutter disclosed herein is useful for severing downhole tubulars and comprises a drive system, a pivoting system, a cutting head, and a cutting member. Cutting is accomplished by rotatingly actuating the cutting head with an associated motor, and then radially extending the cutting blades away from the cutting head. In one embodiment, the cutting head includes a cutting member that pivotally extends from the cutting head upon rotation of the cutting head. | 10-02-2008 |
| 20090277637 | OIL WELL PLUG AND ABANDONMENT METHOD - A method of severing a well string that extends into an oil well from an oil platform with a deck includes supporting upper and lower sections of the well string, the lower section supported at the platform deck with a deck located string support. A shear mechanism cuts the well string at a position that can be above the deck located string support. The upper section is then lifted a selected distance and the deck located string support again supports the string at a position below the cut. | 11-12-2009 |
| 20090283270 | PLUG PROTECTION SYSTEM AND METHOD - Disclosed herein is a downhole plug protection system. The system includes, a tubular having perforations in a perforated portion, a screen in fluidic communication with the tubular, and a ring in sealable communication with the tubular and attached to the screen the ring having an extended portion positioned radially outwardly of the perforated portion. | 11-19-2009 |
| 20090283271 | PLUG PROTECTION SYSTEM AND METHOD - Disclosed herein is a downhole plug protection system. The system includes, a tubular having perforations in a perforated portion, a screen in fluidic communication with the tubular, a ring in sealable communication with the tubular and attached to the screen the ring having an extended portion positioned radially outwardly of the perforated portion, and a float shoe in fluidic communication with the perforations positionable downhole of the perforated portion. | 11-19-2009 |
| 20120292028 | Tubular Cutting with a Sealed Annular Space and Fluid Flow for Cuttings Removal - A cut and pull spear is configured to obtain multiple grips in a tubular to be cut under tension. The slips are set mechanically with the aid of drag blocks to hold a portion of the assembly while a mandrel is manipulated. An annular seal is set in conjunction with the slips to provide well control during the cut. An internal bypass around the seal can be in the open position to allow circulation during the cut. The bypass can be closed to control a well kick with mechanical manipulation as the seal remains set. If the tubular will not release after an initial cut, the spear can be triggered to release and be reset at another location. The mandrel is open to circulation while the slips and seal are set and the cut is being made. Cuttings are filtered before entering the bypass to keep the cuttings out of the blowout preventers. | 11-22-2012 |
| 20120292027 | Tubular Cutting with Debris Filtration - A cut and pull spear is configured to obtain multiple grips in a tubular to be cut under tension. The slips are set mechanically with the aid of drag blocks to hold a portion of the assembly while a mandrel is manipulated. An annular seal is set in conjunction with the slips to provide well control during the cut. An internal bypass around the seal can be in the open position to allow circulation during the cut. The bypass can be closed to control a well kick with mechanical manipulation as the seal remains set. If the tubular will not release after an initial cut, the spear can be triggered to release and be reset at another location. The mandrel is open to circulation while the slips and seal are set and the cut is being made. Cuttings are filtered before entering the bypass to keep the cuttings out of the blowout preventers. | 11-22-2012 |
| 20120168163 | METHOD AND APPARATUS FOR COMPLETING A MULTI-STAGE WELL - An apparatus includes a string that extends into a well and a tool that is disposed in the string. The tool is adapted to form a seat to catch an object communicated to the tool via a passageway of the string in response to the tool being perforated. | 07-05-2012 |
| 20090000786 | METHODS OF PRODUCING FLOW-THROUGH PASSAGES IN CASING, AND METHODS OF USING SUCH CASING - Methods of making and using wellbore casing are described, one method comprising providing a plurality of flow-through passages in a portion of a casing while the casing is out of hole; temporarily plugging the flow-through passages with a composition while out of hole; running the casing in hole in a wellbore intersecting a hydrocarbon-bearing formation; and exposing the composition to conditions sufficient to displace the composition from the flow-through passages while in hole. Methods of using the casing may include pumping a stimulation treatment fluid through the casing string and into a formation through the flow-through passages in the first casing joint; plugging the flow-through passages in the first casing section; and exposing a second casing joint of the casing string to conditions sufficient to displace the composition from the flow-through passages in the second casing joint. | 01-01-2009 |
| 20090050323 | Method for Retaining Debris in a Perforating Apparatus - A perforating apparatus ( | 02-26-2009 |
| 20090050322 | WIRELESS PERFORATING GUN INITIATION - A perforating system and method for wellbore perforating. The system comprises a perforating string having a perforating gun with shaped charges, a communication module for receiving detonation signals, and a controller associated with each perforating gun. The module receives surface signals for gun detonation and wirelessly transmits the signals to selected guns via the associated controllers. | 02-26-2009 |
| 20090107678 | Chemically Enhanced Stimulation of Oil/Gas Formations - Method is provided for drilling of formations containing carbonate minerals with flexible tubing capable of being turned in a very short radius. The very flexible tubing may be placed inside a work string in a well with coiled tubing and a micro-jet bit on the tubing be diverted to a selected direction and depth. Acidic drilling fluid pumped through the micro-jet bit allows high rates of drilling with hydrochloric acid. A slip joint between coiled tubing and the flexible tubing may be used to allow jet drilling without movement of the coiled tubing and use of a jet bit with forward-facing jets. Mixing of acid and base solutions downhole may be used to provide hotter acid solutions for drilling. | 04-30-2009 |
| 20100147519 | MITIGATING PERFORATING GUN SHOCK - A wellbore tool string includes a perforating gun having a plurality of explosive perforating charges and a shock mitigation tool. The shock mitigation tool including a tubular body having a top end, a bottom end, and a chamber; a barrier disposed proximate the bottom end in communication with the chamber; and a plurality of actuators connected with the body proximate to the top end of the body, each actuator opening a port in the body providing fluid communication with the chamber when the plurality of actuators are activated. | 06-17-2010 |
| 20120103612 | System and Method for Opening a Window in a Casing String for Multilateral Wellbore Construction - A system for opening a window in a casing string ( | 05-03-2012 |
| 20090078420 | PERFORATOR CHARGE WITH A CASE CONTAINING A REACTIVE MATERIAL - A perforator charge includes a case formed of a material blend that includes a reactive material that is activated during explosive detonation of the perforator charge. An explosive and a liner are contained in the case, with the liner to collapse in response to detonation of the explosive. | 03-26-2009 |
| 20100276144 | HIGH PRESSURE/DEEP WATER PERFORATING SYSTEM - A perforating system having a perforating gun with a gun body formed from a ductile material. The gun body deforms under pressure while maintaining sufficient structural integrity to remain intact, and without rupturing or leaking. A flowable material can be inserted within the gun body that provides additional support to the gun body. | 11-04-2010 |
| 20100218952 | Method and apparatus to remove a downhole drill collar from a well bore - A method of severing a drill string or other tubular string that includes lowering a torch into the drill string, positioning the torch at a joint in the drill string, such that the joint may have a pin component engaged with a box component, igniting the torch to produce cutting fluids, and directing the cutting fluids into the joint in a direction that is along a length of the drill string to cut the joint. | 09-02-2010 |
| 20100230104 | METHOD FOR COMPLETING A BOREHOLE - The invention relates to a method for completing a borehole ( | 09-16-2010 |
| 20100236781 | METHOD AND APPARATUS FOR PERFORATING MULTIPLE WELLBORE INTERVALS - A bottom hole assembly for one trip perforating and treating a wellbore, the bottom hole assembly including: a tool body including an outer surface and an upper end; a fluid passage extending into the tool body from the upper end; a valve to provide (i) in one orientation fluid access from the fluid passage to an outlet port opening to the outer surface and (ii) in another orientation fluid access from the fluid passage to a perforating gun actuation fluid supply channel while sealing fluid access from the fluid passage to the outer surface; an annular sealing member encircling the outer surface below the outlet port; and a perforating gun carried below the resettable, annular sealing member and hydraulically actuable to detonate by fluid communication through the perforating gun actuation fluid supply channel. | 09-23-2010 |
| 20100126725 | COILED TUBING BOTTOM HOLE ASSEMBLY WITH PACKER AND ANCHOR ASSEMBLY - A bottom hole assembly (BHA), adapted to be positioned in a casing and to isolate a portion of a wellbore, which includes a packer assembly with a first sealing element extending between first and second portions of the packer assembly. A method of setting a BHA in a casing which includes increasing a BHA pressure to activate an anchor assembly, applying a mechanical force to mechanically deform a first sealing element to thereby establish an initial seal between the first sealing element and an interior surface of the casing, and increasing a pressure in a space between the BHA and the casing and in a cavity within the BHA to increase a differential pressure across the first sealing element and thereby establish a pressure-energized seal between the first sealing element and the interior surface of the casing. | 05-27-2010 |
| 20100000737 | METHODS FOR DOWNHOLE SEQUESTRATION OF CARBON DIOXIDE - Carbon dioxide is sequestered in a formation using a dual completion and injection method that reduces or eliminates upward leak rates of the sequestered carbon dioxide. The dual completion and injection method involves the injection of a benign fluid such as brine (water) into a permeable layer of the formation located above the sequestration layer and which is separated form the sequestration layer by a nearly impermeable layer. The water is preferably injected at the same time the carbon dioxide is injected. | 01-07-2010 |
| 20110000669 | Perforating Gun Assembly and Method for Controlling Wellbore Pressure Regimes During Perforating - A perforating gun assembly for use in a wellbore. The perforating gun assembly includes a carrier gun body and a charge holder disposed within the carrier gun body. A plurality of shaped charges are supported within the carrier gun body. A secondary pressure generator is operably associated with at least one of the shaped charges. The secondary pressure generator optimizes the wellbore pressure regime immediately after detonation of the shaped charges by controlling the dynamic underbalance created by the empty gun chambers to prevent excessive dynamic underbalance which may detrimentally effect the perforating operation. | 01-06-2011 |
| 20110005754 | METHODS OF PRODUCING FLOW-THROUGH PASSAGES IN CASING, AND METHODS OF USING SUCH CASING - Methods of making and using wellbore casing are described, one method comprising providing a plurality of flow-through passages in a portion of a casing while the casing is out of hole; temporarily plugging the flow-through passages with a composition while out of hole; running the casing in hole in a wellbore intersecting a hydrocarbon-bearing formation; and exposing the composition to conditions sufficient to displace the composition from the flow-through passages while in hole. Methods of using the casing may include pumping a stimulation treatment fluid through the casing string and into a formation through the flow-through passages in the first casing joint; plugging the flow-through passages in the first casing section; and exposing a second casing joint of the casing string to conditions sufficient to displace the composition from the flow-through passages in the second casing joint. | 01-13-2011 |
| 20110011587 | DEVICE FOR THE DYNAMIC UNDER BALANCE AND DYNAMIC OVER BALANCE PERFORATING IN A BOREHOLE - According to a preferred embodiment, a dynamic underbalance device has a longitudinally extending tool string including an underbalance part. A first overbalance part is above the underbalance part and a second overbalance part below the underbalance part. Upon application of underbalance from the underbalance part and overbalance from the overbalance part, the overbalance and underbalance interact to isolate the underbalance. | 01-20-2011 |
| 20110024116 | Electric and Ballistic Connection Through A Field Joint - A perforating system having annular connectors for attachment between adjacent perforating guns and connectors. The connectors include male and female connectors with respective outer and inner contact surfaces. The connectors also include attachment for electrical detonators and/or booster charges for transferring ballistic detonations between the perforating gun and connector sub. | 02-03-2011 |
| 20110174486 | Wellbore Perforation Tool - A wellbore perforation tool is provided. The tool comprises an explosive charge, a tool body containing the explosive charge, and a flowable material carried with the tool. The flowable material is released by detonation of the explosive charge and, after perforation of the tool body by the explosive charge to form an aperture in the tool body, flows to form at least a partial barrier of the aperture. | 07-21-2011 |
| 20100065274 | System and Method for Performing Multiple Downhole Operations - A device for perforating and fracturing a formation in a single trip includes shaped charges and a volume of a gas generator. When activated by detonation of the shaped charges, the gas generator forms a high-pressure gas, which includes steam, that expands to stress and fracture the formation. Suitable gas generating materials include hydrates and hydroxides. Other materials that can be employed with the gas generator include oxidizers and material such as metals that increase the available heat for the activation of the gas generator. | 03-18-2010 |
| 20110100627 | System and Method for Dynamically Adjusting the Center of Gravity of a Perforating Apparatus - A perforating apparatus ( | 05-05-2011 |
| 20110146988 | Apparatus and Method for Separating a Downhole Tubular String into Two Parts - An apparatus for separating a downhole tubular string into two parts. The apparatus includes a receptacle operably associated with a first part of the downhole tubular string and a mandrel operably associated with a second part of the downhole tubular string. First and second sleeves each having a profile are slidably positioned between the receptacle and the mandrel and are operable to be securably coupled to the mandrel in first and second positions relative to the mandrel. First and second rings are respectively positioned between the profiles of the first and second sleeves and the profiled surface of the receptacle. The first and second rings are operable to initially limit longitudinal movement of the receptacle relative to the mandrel, to prevent tubular string recoil during operation and to allow longitudinal movement of the receptacle relative to the mandrel after operation. | 06-23-2011 |
| 20110209871 | Perforating Gun Assembly and Method for Controlling Wellbore Pressure Regimes During Perforating - A downhole tool gun string assembly comprises a first perforating gun operable to generate a first pressure at a first location in a wellbore, wherein the first perforating gun comprises a first plurality of perforating charges; a second perforating gun operable to generate a second pressure at a second location in the wellbore, wherein the second pressure is different from the first pressure and the second perforating gun comprises a second plurality of perforating charges, and wherein at least one of the second plurality of perforating charges is operably associated with a secondary pressure generator, where the first perforating gun and the second perforating gun are configured to maintain a pressure at a selected location in the wellbore below a threshold when the first and second perforating guns are activated substantially concurrently. | 09-01-2011 |
| 20120199352 | CONNECTION CARTRIDGE FOR DOWNHOLE STRING - A cartridge assembly for use with a perforating system having a contact terminal that connects to a perforating signal line when inserted into a receptacle end of a perforating gun. A detonator may be included in an end of the cartridge assembly for initiating a detonating cord in the perforating gun. The cartridge assembly is a modular unit that replaces the manual connections made when assembling a string of perforating guns. The cartridge assembly may optionally include a controller switch for controlling current flow through the cartridge assembly. | 08-09-2012 |
| 20120199351 | METHOD FOR REMOVING A CONSUMABLE DOWNHOLE TOOL - A method for providing a torch apparatus into a well bore for providing heat to a material that includes the step of inserting the torch apparatus into the well bore, such that a plurality of slots along the torch apparatus are oriented to provide the heat and a source of oxygen to the material. The method further includes igniting a fuel load of the torch apparatus to provide the heat and the source of oxygen through the plurality of slots to the material so that the portion of the material is at least partially consumed. The interstitial spaces between the plurality of slots allow longitudinal flow of heat and the source of oxygen along the torch apparatus without interfering with the flow of heat and the source of oxygen through the slots. | 08-09-2012 |
| 20090071651 | SYSTEM FOR COMPLETING WATER INJECTOR WELLS - A system for completing water injection wells includes an injector well completion system. In an embodiment, an injector well completion system in a formation has a casing string disposed in a wellbore having an annulus. The casing string includes a casing and a perforating gun. The casing string is run into the wellbore and cemented to provide a cemented casing string having the perforating gun. The tubing is run into the wellbore inside the cemented casing string. | 03-19-2009 |
| 20110132608 | Device for the Focus and Control of Dynamic Underbalance or Dynamic Overbalance in a Wellbore - A downhole tool assembly for use in a wellbore includes a tubular body carrying an explosive which is selectively detonated to create a dynamic underbalance or overbalance effect in the wellbore. The tubular body has opposite ends provided with plug assemblies including plug elements movable between a normally collapsed state and an actuable expanded state. The plug elements are adapted to be actuated to the expanded state between the tubular body and an outer extent of the wellbore before the creation of the dynamic underbalance or overbalance effect to isolate a discrete segment of the wellbore to which the dynamic underbalance or overbalance effect is confined. | 06-09-2011 |
| 20110094743 | System and Method for Dynamically Adjusting the Center of Gravity of a Perforating Apparatus - A perforating apparatus ( | 04-28-2011 |
| 20120037366 | BURST DISK-ACTUATED SHAPED CHARGES, SYSTEMS AND METHODS OF USE - One or more burst disks, for isolating downhole communication between a tubular and a hydrocarbon-bearing formation, are fit with a shaped explosive charge. Detonation of the shaped charge is initiated by the rupture of the burst disk. In a system for stimulating the formation, one or more sets of two or more shaped charge, enhanced burst disks are located at a location along the tubular corresponding to a selected interval for stimulation. The enhanced burst disks can be fit with a chamber of known pressure for establishing a known and significant pressure differential across the burst disk for enabling substantially simultaneous rupture at the selected interval. | 02-16-2012 |
| 20120037365 | PERFORATING GUN WITH ROTATABLE CHARGE TUBE - A perforating gun designed to orient a charge holding structure (e.g., tube, solid rod) within a barrel of the perforating gun to be at the same position relative to a wellbore casing regardless of a position of the barrel of the perforating gun. A charge assembly receivable within the barrel includes the charge holding structure and first and second end caps that are rotatably interconnected to the charge holding structure and non-rotatably interconnected to the barrel. As the charge holding structure is always or substantially always designed to maintain a common orientation in relation to the wellbore casing, explosive charges associated with the charge holding structure so as to fire towards particular location on the wellbore casing may always or substantially always perforate such particular locations upon or after the explosive charges have fired. | 02-16-2012 |
| 20100230105 | PERFORATING WITH WIRED DRILL PIPE - Embodiments of the invention include methods and systems for perforating a well using a wired work string assembly. According to embodiments of the invention, the method includes positioning a wired work string assembly in a wellbore, the work string assembly comprising a plurality of wired pipe communicatively coupled at each joint, a depth correlation tool, and a perforating gun assembly. A depth of the perforating gun assembly is determined from a depth correlation tool positioned within the wellbore, and an electrical signal related to the depth of the perforating gun assembly is transmitted to a surface above the wellbore. Firing of the perforating gun assembly is initiated via a signal transmitted from the surface above the wellbore. An electrical signal from the wellbore is transmitted to the surface to confirming the firing of perforating gun assembly. The system includes various tools for perforating the well using the disclosed methods. | 09-16-2010 |
| 20120000656 | Apparatus And Methods For Producing Oil and Plugging Blowouts - An apparatus for producing oil from a well comprises a flexible semi-circular shaped skirt with an indentation. A plurality of rods is secured to the skirt and form radially emanating channels in the skirt. The skirt is secured to a hollow drill string via the indentation. The drill string has a drill bit at one end, a distal section above the drill bit, and a holding section above the distal section to which the skirt is operatively coupled. A movable sleeve is selectively wrapped around the skirt to keep the skirt in a closed position. A release that is interactive with the sleeve selectively allows the skirt to move from the closed position to an open position, and an outer area covered by the skirt increases as the skirt moves from the closed position to the open position. The open skirt abuts against and plugs the well. | 01-05-2012 |
| 20120043083 | BLOWOUT PREVENTER WITH SHEARING BLADES AND METHOD - The disclosure provides a blowout preventer (BOP) system with a ram having a shear blade with a shear blade profile to shear a tubular member disposed in the BOP. The shear blade profile can include a stress concentrator and centering shaped surface. The stress concentrator and the centering shaped surface can be laterally offset from a centerline of ram travel and on opposite sides of the centerline. An opposing second shear blade can have a mirror image of the shear blade profile with the stress concentrator and centering shaped surface reversed to the orientation of the first shear blade. Further, the ram can include a mandrel with a mandrel profile for the tubular member to deform around during the shearing process and to reduce an overall lateral width of the sheared tubular member in the BOP through-bore to allow retrieval of the deformed sheared tubular member from the BOP. | 02-23-2012 |
| 20120118570 | Device for a Downhole Apparatus for Machining of Casings and Also a Method of Depositing Machined Shavings - There is described a device for machining apparatus arranged for machining of a portion of a casing positioned in a wellbore, wherein a return fluid conduit extends from the machining apparatus in a direction toward a deposit area arranged in the wellbore. Also described is a method for machining of a portion of a casing positioned in a wellbore, wherein the method comprises the steps of: arranging a return fluid conduit between a machining apparatus and a deposit area or an area connected to the deposit area, providing a particle carrying liquid flow (M) in a direction from the machining apparatus and toward the deposit area, during the machining of the casing leading metal shavings into the liquid flow (M), and directing the liquid flow (M) into the return fluid conduit, as the metal shavings are held back and deposited in the wellbore. | 05-17-2012 |
| 20120118569 | Oxygen Scavenger Compositions for Completion Brines - An oxygen scavenger for completion brines effective and stable in high temperature subterranean formations. In one embodiment, the scavenger contains erythorbate and alkylhydroxlyamine. | 05-17-2012 |
| 20120118568 | METHOD AND APPARATUS FOR WELLBORE PERFORATION - A method for wellbore perforation in which a section of the wellbore to be perforated is isolated and purged of wellbore fluid to provide a clear path for laser beam transmittal. A laser beam emitter in the purged wellbore section transmits a laser beam pulse from the laser beam emitter to a target area of a sidewall and formation lithology of the purged wellbore section, thereby altering a mechanical property of a material of the sidewall and formation lithology and producing material debris. A liquid jet pulse of a liquid is transmitted immediately following termination of the laser beam pulse to the target area, thereby removing the material debris from the target area. This cycle is then repeated until the desired perforation depth has been achieved. | 05-17-2012 |
| 20120111566 | APPARATUS AND METHOD FOR STIMULATING SUBTERRANEAN FORMATIONS - A method of stimulating a subterranean formation using a tubular member with one or more burst disks therein. | 05-10-2012 |
| 20120018156 | GAS CUSHION NEAR OR AROUND PERFORATING GUN TO CONTROL WELLBORE PRESSURE TRANSIENTS - A method for perforating a formation material proximate to a wellbore involving lowering a perforating gun string comprising a perforating gun and a gas-generating device downhole, providing wellbore fluid around the perforating gun, and providing a volume of gas proximate the perforating gun, by the gas-generating device, wherein the volume of gas is configured to reduce the shock produced upon firing of the perforating gun. | 01-26-2012 |
| 20120018157 | BALLISTIC TRANSFER DELAY DEVICE - A ballistic transfer delay device and method of use. The ballistic transfer delay device does not include a firing pin and it is not pressure initiated. The device comprises a time delay fuse, a through-bulkhead initiator to initiate the time delay fuse, and an output booster to ballistically transfer the energy from the initiated time delay fuse. | 01-26-2012 |
| 20100181072 | Downhole Well Access Line Cutting Tool - A cutting tool for cutting a wireline, slickline, coiled tubing, or other well access line stuck downhole in a well. The tool includes a host of features including a propulsion mechanism to aid in delivering the tool to a predetermined cut location of the line. In this manner, the risk of unintended uphole cutting of the line may be minimized. Thus, the time and expense of any follow-on fishing operations to remove tools stuck further downhole may be reduced. | 07-22-2010 |
| 20120152542 | WELL PERFORATING WITH DETERMINATION OF WELL CHARACTERISTICS - A formation testing method can include interconnecting multiple pressure sensors and multiple perforating guns in a perforating string, the pressure sensors being longitudinally spaced apart along the perforating string, firing the perforating guns and the pressure sensors measuring pressure variations in a wellbore after firing the perforating guns. Another formation testing method can include interconnecting multiple pressure sensors and multiple perforating guns in a perforating string, firing the perforating guns, thereby perforating a wellbore at multiple formation intervals, each of the pressure sensors being positioned proximate a corresponding one of the formation intervals, and each pressure sensor measuring pressure variations in the wellbore proximate the corresponding interval after firing the perforating guns. | 06-21-2012 |
| 20120160492 | BORON SHAPED CHARGE - A shaped charge includes a casing; a liner located within an opening of the casing; and an explosive located in the region between the casing and the liner, wherein at least one of the liner and the explosive comprises an intermetallic mixture comprising boron and a reactant metal. The reactant metal is one selected from the group consisting of Ti, Mg, Zr, Mo, and a combination thereof. A method for perforating in a well includes positioning a perforating gun in the well, wherein the perforating gun includes a shaped charge that includes: a casing; a liner located within an opening of the casing; and an explosive located in the region between the casing and the liner, wherein at least one of the liner and the explosive includes an intermetallic mixture that contains boron and a reactant metal; and detonating the shaped charge in the well. | 06-28-2012 |
| 20090133876 | Method and Apparatus for Moving a High Pressure Fluid Aperture in a Well Bore Servicing Tool - A well bore servicing apparatus comprising a housing having a longitudinal axis and a through bore, and a movable member disposed in said housing, said movable member having a through bore and a fluid aperture therein, wherein said movable member is movable between a first stop position and a second stop position relative to said housing and along said axis, wherein said fluid aperture is in fluid communication with said housing through bore and said movable member through bore to provide a fluid stream to the well bore in said first and second axially spaced stop positions. A well bore servicing apparatus comprising a work string, a housing coupled to said work string, and a member slidably coupled to said housing, said slidable member having a fluid jetting nozzle and a fluid path therethrough communicating fluid to said fluid jetting nozzle, wherein said slidable member is operable to place said fluid jetting nozzle in a plurality of axially spaced stop positions relative to said housing and said work string. | 05-28-2009 |
| 20120247770 | METHODS OF RELEASING AT LEAST ONE TUBING STRING BELOW A BLOW-OUT PREVENTER - A method of controlling a blowout comprises: releasing at least a first tubing string into a portion of a well system, wherein the step of releasing comprises activating a release table; and causing or allowing a blowout preventer to close. The methods further comprise: compressing at least a portion of a second tubing string and a third tubing string together, wherein the step of compressing comprises activating a crimping device; cutting through the wall of at least a third tubing string, wherein the step of cutting comprises activating a cutting device, and wherein the step of cutting is performed after the step of compressing; and releasing at least the second tubing string and the third tubing string into a portion of a well system, wherein the step of releasing comprises activating a release table. | 10-04-2012 |
| 20120160491 | METHOD AND DESIGN FOR HIGH SHOT DENSITY PERFORATING GUN - A perforating gun includes a plurality of shaped charges located at a first distance from a detonator along a plurality of detonating cords and forming a first group, wherein the first group of shaped charges is configured to be detonated simultaneously. The plurality of detonating cords are of the same length. | 06-28-2012 |
| 20120247771 | PERFORATING GUN AND ARMING METHOD - The perforating gun and methods of arming a perforating gun facilitates electrically connecting an arming device carrying the detonator to the loading tube carrying the explosive charges prior to ballistically connecting the arming device to the loading tube. Subsequent to establishing electrical continuity across the loading tube and arming device, the arming device can be ballistically connected to the loading tube thereby arming the perforating gun. | 10-04-2012 |
| 20100012321 | COMMUNICATING THROUGH A BARRIER IN A WELL - A technique that is usable with a well includes communicating a ballistic wave from a first point in a well to a second point in the well without propagating the ballistic wave along a detonating cord. The first and second points are separated by at least one foot. The technique includes responding to the ballistic wave near the second point to activate a downhole tool. | 01-21-2010 |
| 20110094744 | System and Method for Dynamically Adjusting the Center of Gravity of a Perforating Apparatus - A perforating apparatus ( | 04-28-2011 |
| 20120073815 | BLOWOUT PREVENTER BLADE ASSEMBLY AND METHOD OF USING SAME - Techniques for shearing a tubular of a wellbore penetrating a subterranean formation with a blowout preventer are provided. The blowout preventer has a housing with a hole therethrough for receiving the tubular. The techniques relate to a blade assembly including a ram block movable between a non-engagement position and an engagement position about the tubular, a blade carried by the ram block for cuttingly engaging the tubular, and a retractable guide carried by the ram block and slidably movable therealong. The restractable guide has a guide surface for urging the tubular into a desired location in the blowout preventer as the ram block moves to the engagement position. | 03-29-2012 |
| 20120186816 | Single-Assembly System and Method for One-Trip Drilling, Casing, Cementing and Perforating - Disclosed systems and methods provide well creation in a single trip. Some system embodiments include: a casing string having a distal end with a latch assembly; and a drillstring latched within the casing string by the latch assembly, the drillstring having at least one tool for perforation and stimulation. A pressure while drilling tool and one or more packers may be provided in the drillstring to further enable the stimulation operation. Prior to perforation, the casing string is cemented in place via a cement valve, and the drillstring is unlatched and raised to the desired completion position. The perforation and stimulation process can be repeated to provide multiple completions. The drillstring can be removed from the borehole or seated in place to control production. Logging instruments can be included for steering and/or use in making completion decisions. | 07-26-2012 |
| 20100326659 | WELLBORE 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. | 12-30-2010 |
| 20120318508 | Shock Load Mitigation in a Downhole Perforation Tool Assembly - A perforation tool assembly is provided. The perforation tool assembly comprises an energy train, a first perforation gun, and a second perforation gun. The energy train comprises a moderator to reduce the speed of propagation of a detonation in a direction parallel to the axis of the perforation tool assembly. The first perforation gun comprises a plurality of explosive charges coupled to a first portion of the energy train. The second perforation gun comprises a plurality of explosive charges coupled to a second portion of the energy train, wherein the second portion of the energy train is coupled to the first portion of the energy train. | 12-20-2012 |
| 20120298361 | SELECT-FIRE STACKABLE GUN SYSTEM - A system and method of perforating by stacking a perforating string within a wellbore, then deploying the perforating string to a designated depth for detonating shaped charges in the perforating string. The string can be formed by anchoring a single perforating gun in the wellbore, then landing subsequent guns on one another atop the anchored gun. Wet connects on the ends of the perforating guns enable mechanical engagement of each adjacent gun as well as signal communication through the connections. | 11-29-2012 |
| 20120273201 | Shock Load Mitigation in a Downhole Perforation Tool Assembly - A perforation tool assembly is provided. The perforation tool assembly comprises an energy train, a first perforation gun, and a second perforation gun. The energy train comprises a moderator to reduce the speed of propagation of a detonation in a direction parallel to the axis of the perforation tool assembly. The first perforation gun comprises a plurality of explosive charges coupled to a first portion of the energy train. The second perforation gun comprises a plurality of explosive charges coupled to a second portion of the energy train, wherein the second portion of the energy train is coupled to the first portion of the energy train. | 11-01-2012 |
| 20120318507 | Hydrocarbon well and technique for perforating casing toe - A method and apparatus for completing a horizontal hydrocarbon well includes cementing a casing string in the well and creating passages through the casing string adjacent float equipment near the casing toe by slowly dissolving a plug with completion fluid used to pump cement into an annulus between the casing string and bore hole. By the time the cement sets up, the plug dissolves leaving passages in the casing string through which a first frac job may be pumped or which allows pumping perforating equipment into the horizontal leg without requiring a coiled tubing run. The technique can also be used in vertical wells to save a perforating gun run. | 12-20-2012 |
| 20120325479 | COILED TUBING BOTTOM HOLE ASSEMBLY WITH PACKER AND ANCHOR ASSEMBLY - A bottom hole assembly (BHA), adapted to be positioned in a casing and to isolate a portion of a wellbore, which includes a packer assembly with a first sealing element extending between first and second portions of the packer assembly. A method of setting a BHA in a casing which includes increasing a BHA pressure to activate an anchor assembly, applying a mechanical force to mechanically deform a first sealing element to thereby establish an initial seal between the first sealing element and an interior surface of the casing, and increasing a pressure in a space between the BHA and the casing and in a cavity within the BHA to increase a differential pressure across the first sealing element and thereby establish a pressure-energized seal between the first sealing element and the interior surface of the casing. | 12-27-2012 |
| 20120138302 | DEVICE AND METHOD FOR WELL STIMULATION - A device for well stimulation comprising a carrying element ( | 06-07-2012 |
| 20120138301 | Controllably Installed Multilateral Completions Assembly - A multilateral completions assembly having selectively isolated lateral legs during hardware installation. The assembly includes a variety of isolation sleeves disposed interior of the main bore casing and adjacent corresponding pre-located windows through the casing. Thus, lateral legs may be sequentially created through the formation at each window in a manner that allows for follow-on isolation. As a result, fluid losses from newly formed legs may be avoided during completions operations. That is, as each leg is formed it may also be isolated in advance of forming of the next leg thereby enhancing the efficiency of completions operations as well as follow-on production. | 06-07-2012 |
| 20130008658 | WELLBORE 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 |
| 20130008656 | WELLBORE 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 |
| 20130008657 | WELLBORE 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 |
| 20130008659 | WELLBORE 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 |
| 20130008655 | Perforating Gun Assembly and Method for Controlling Wellbore Pressure Regimes During Perforating - A method comprises providing a gun string assembly within a wellbore and perforating the wellbore using the gun string assembly. The gun string assembly comprises a plurality of perforating guns coupled in series. A first perforating gun of the plurality of perforating guns comprises a first portion of shaped charges, and a second perforating gun of the plurality of perforating guns comprises a second portion of shaped charges operably associated with a secondary pressure generator. The first perforating gun and the second perforating gun are configured in the gun string assembly to provide a pressure transient comprising one or more pressures at a location in the wellbore that meet one or more thresholds. | 01-10-2013 |
| 20110132607 | Apparatus and Technique to Communicate With a Tubing-Conveyed Perforating Gun - A technique that is usable with a well includes providing a string that includes a tubing conveyed perforating (TCP) gun. The technique includes using a downhole component of the string to communicate uphole an indication of at least a depth or an orientation of the gun. | 06-09-2011 |
| 20130140026 | OIL WELL PLUG AND ABANDONMENT METHOD - A method of severing a well string that extends into an oil well from an oil platform with a deck includes supporting upper and lower sections of the well string, the lower section supported at the platform deck with a deck located string support. A shear mechanism cuts the well string at a position that can be above the deck located string support. The upper section is then lifted a selected distance and the deck located string support again supports the string at a position below the cut. | 06-06-2013 |
| 20120247769 | SELECTABLE, INTERNALLY ORIENTED AND/OR INTEGRALLY TRANSPORTABLE EXPLOSIVE ASSEMBLIES - A system can include multiple explosive assemblies, each assembly comprising an outer housing, an explosive component rotatable relative to the housing, and a selective firing module which causes detonation of the component in response to a predetermined signal. A method can include assembling multiple explosive assemblies at a location remote from a well, installing a selective firing module, an electrical detonator and an explosive component in a connector, and connecting the connector to an outer housing, and then transporting the assemblies from the remote location to the well. A well perforating method can include assembling multiple perforating guns, each gun comprising a gun body, a perforating charge, and a selective firing module which causes detonation of the charge in response to a predetermined signal. The guns are installed in a wellbore, with the charge of each gun rotating relative to the respective gun body. | 10-04-2012 |
| 20130133889 | SELECTABLE, INTERNALLY ORIENTED AND/OR INTEGRALLY TRANSPORTABLE EXPLOSIVE ASSEMBLIES - A system can include multiple explosive assemblies, each assembly comprising an outer housing, an explosive component rotatable relative to the housing, and a selective firing module which causes detonation of the component in response to a predetermined signal. A method can include assembling multiple explosive assemblies at a location remote from a well, installing a selective firing module, an electrical detonator and an explosive component in a connector, and connecting the connector to an outer housing, and then transporting the assemblies from the remote location to the well. A well perforating method can include assembling multiple perforating guns, each gun comprising a gun body, a perforating charge, and a selective firing module which causes detonation of the charge in response to a predetermined signal. The guns are installed in a wellbore, with the charge of each gun rotating relative to the respective gun body. | 05-30-2013 |
| 20130112411 | PERFORATOR CHARGE HAVING AN ENERGETIC MATERIAL - A perforator charge includes a case, an explosive inside the case, and a liner to be collapsed by detonation of the explosive to form a perforating jet. The perforator charge also includes an energetic material to be activated in response to the detonation of the explosive. | 05-09-2013 |
| 20130098617 | Wellbore Perforation Tool - A perforation tool comprises an explosive charge comprising an explosive focal axis, a tool body containing the explosive charge, and a flowable material carried with the tool and disposed along the explosive focal axis. The flowable material is configured to be released by detonation of the explosive charge and flow to create at least a partial barrier to flow through the aperture in response to the perforation of the tool body by the explosive charge to form an aperture in the tool body. | 04-25-2013 |
| 20130098616 | FLOW ISOLATION SUB FOR TUBING OPERATED DIFFERENTIAL PRESSURE FIRING HEAD - An isolation sub for use in a perforating system that includes a pressure activated firing head. The isolation sub is set between the pressure source that is used to initiate the firing head. A pressure regulator in the sub is responsive to fluctuations in pressure difference between the pressure source and wellbore and isolates the firing head when the pressure difference is at or approaches a designated pressure difference that could initiate the firing head. The pressure regulator includes a spring loaded piston that seals the firing head from the source pressure before the pressure difference activates the firing head. | 04-25-2013 |
| 20130098615 | NOVEL HIGH DENSITY BRINES FOR COMPLETION APPLICATIONS - Clear, high density brine for use completion operations in a subterranean formation for the recovery of hydrocarbons. The brine comprises an ionic compound selected from the group consisting of zinc iodide, strontium bromide, strontium iodide, cerium bromide, cerium iodide, cerium chloride, lanthanum bromide, lanthanum iodide, lanthanum chloride, and mixtures thereof. The brine may also advantageously be used as the internal phase of invert emulsion drilling fluids. | 04-25-2013 |
| 20130118745 | INTERNALLY PRESSURIZED PERFORATING GUN - A technique facilitates a perforation operation. A perforating gun carrier is combined with a pressure enhancement mechanism. The pressure enhancement mechanism provides a controlled increase in pressure within the perforating gun carrier as the perforating gun carrier is delivered into a higher pressure environment. The increase in internal pressure counters the buildup of a pressure differential to the degree desired for a given perforating gun carrier. | 05-16-2013 |
| 20130126168 | Rotary Fluid Jet Cutter - Apparatus for cutting tubulars or solid work pieces by fluid jet pressure without the need for attaching the apparatus to the tubular. The apparatus minimizes the risk of explosion due to overheating or sparks caused by open flames, k method for cutting the tubular or solid work piece is also disclosed. The apparatus may be used for cutting the casing of an oil or gas well as it is removed from the well. | 05-23-2013 |
| 20130126167 | PERCUSSION OPERATED FIRING MECHANISM FOR PERFORATION OF WELLBORES AND METHODS OF USING SAME - Perforation guns comprise a firing head to activate an initiator which, in turn, causes detonation of perforation charges. The firing head comprises a firing pin in sliding engagement with a bore of a housing. An opening in the housing places the firing pin in fluid communication with a wellbore annulus when the perforation gun is disposed in the wellbore. A release mechanism maintains the firing pin in it is initial position. Upon being disposed in the desired location within the wellbore, the release mechanism is actuated allowing the firing pin to move within the bore. Hydrostatic pressure acts on the firing pin in a first direction that is determined by a bias provided by one end of the firing pin providing greater resistance to movement as compared to the other end. Movement of the firing pin causes the firing pin to strike the initiator causing detonation of the perforation charges. | 05-23-2013 |
| 20080202753 | METHOD AND APPARATUS FOR EXPANDING AND SEPARATING TUBULARS IN A WELLBORE - Embodiments of the present invention provide an apparatus and method for expanding a tubular. In one aspect, embodiments of the prevent invention provide an expander tool having at least two expansion members radially extendable from the expander tool into contact with a surrounding inside surface of the tubular, the at least two expansion members radially extendable at different times and axially spaced after radially extending. In another aspect, embodiments include a method for isolating a first portion of a wellbore from a second portion of a wellbore comprising locating an expandable tubular within the wellbore between the first and second portions, the expandable tubular having a weakened portion therein, isolating the first portion from the second portion of the wellbore, and expanding the expandable tubular proximate to the weakened portion to sever the expandable tubular. | 08-28-2008 |
| 20130146287 | COMPOSITE PERFORATION METHOD AND DEVICE WITH PROPPING AGENT - The present invention provides composite perforation methods and device with propping agent capable of effectively propping the fractures in the oil layer, thereby reducing the closure of fractures and prolonging the oil extraction cycle. The device comprises one or more connected perforators wherein each of said perforator comprises one or more perforating charges and a propping agent unit | 06-13-2013 |
