Class / Patent application number | Description | Number of patent applications / Date published |
166312000 | Liquid introduced from well top | 49 |
20080210428 | Method of removing filter cake - A filter cake deposited by a drilling fluid, drill-in fluid or fluid loss control pill may be removed from a wellbore by introducing into the wellbore a dispersing agent of an organic amino phosphonic acid, ester or salt. The dispersing agent forms a dispersion containing at least a portion of the drilled solids. The dispersing agent may be introduced into the wellbore as a component of a filter cake removal treatment fluid or either prior to or after introduction of the filter cake removal treatment fluid. | 09-04-2008 |
20080217018 | Method for pickling a work string using dispersed solvent-in-acid fluid design - A method for cleaning a work string which may have been used to inject drilling muds, cement slurries, cement displacement materials and the like into a well where the work strong may contain drilling mud residues, cement slurry residues, cement slurry displacement materials, pipe thread lubricants, pipe dope and the like, as well as corrosion on the inside of the work string by injecting a dispersion slug into and recovering the dispersion slug from the work string. | 09-11-2008 |
20080217019 | COILED TUBING WELLBORE CLEANOUT - A method and apparatus for substantially cleaning fill from a borehole is described variously including running a coiled tubing assembly into the wellbore, creating a fluid vortex by circulating cleaning fluid through the coiled tubing, and pulling the coiled tubing and coiled tubing assembly out of the hole at a speed sufficient to substantially clean the particulate solids from the wellbore. An apparatus for substantially cleaning fill from a hole, including vertical, horizontal, or deviated wells also is provided. | 09-11-2008 |
20080223580 | Completion Method for Well Cleanup and Zone Isolation - A completion method isolates a lower zone while circulation at high rates takes place above to clean debris out of the wellbore. Pressure fluctuation sensitive equipment in a lower completion is isolated with a tubing valve during circulation. This further prevents debris from clogging inlet pressure passages to equipment below the isolation valve during circulation to get the debris out. After circulation the packer is unset and the tubing valve is opened and a wellbore filter tool directs well fluids through a screen and captures the debris as the string is pulled toward the surface. | 09-18-2008 |
20090050326 | Device and Method for Cleaning a Compressor - A system for cleaning compressors ( | 02-26-2009 |
20090114394 | Method of Using Water-in-Oil Emulsion to Remove Oil Base or Synthetic Oil Base Filter Cake - Fluid producing or injecting wells may be treated with a water-in-oil emulsion for the removal or inhibition of unwanted particulates, including pipe dope, asphaltenes and paraffins. In addition, such emulsions are effective in the displacement of oil base drilling muds and/or residues from such muds from wells. The emulsion may also be used to break the interfacial and/or rheological properties of oil base mud and synthetic oil base mud filter cakes, and act as a demulsifier to break the water-in-oil emulsion present in such oil base and synthetic oil base muds. The water-in-oil emulsions may optionally contain a dispersing agent as well as a surfactant. | 05-07-2009 |
20090139723 | Filtercake Removal - A treatment fluid and a method are disclosed for cleaning borehole filtercake using the treatment fluid, wherein the filtercake contains reservoir drilling fluid (RDF) solids. The method includes pumping the treatment fluid downhole in contact with the filtercake to be removed to establish a differential pressure between the treatment fluid and the formation adjacent the filtercake, and evenly propagating treatment of the filtercake during the differential pressure period to delay breakthrough by the treatment fluid for a period from 1 to 12 hours. The treatment fluid comprises a fluoride source providing a 1.2 to 5 molar fluoride concentration, and another acid or combination of acids to provide a pH between 1.8 and 5. The treatment fluid is balanced for a dissolving power high enough to have significant dissolution of the filtercake, but low enough for even propagation to avoid premature leak-off. | 06-04-2009 |
20090205832 | APPARATUS TO CLEAR CONTROL LINE IN WELL - A control line clearing apparatus has a separation sleeve that positions into a downhole element adjacent the element's control port to which a blocked control line connects. The sleeve separates fluid communication from the control port with the annulus between the sleeve and the downhole element, while still allowing effluents in the well tubing to pass through the interior of the sleeve. A feed line is then lowered into the sleeve, and an automatic coupling on the end of the feed line couples to a coupling member inside the sleeve. Once connected, solvent fed through the feed line communicates with the downhole elements control port via a cross-port in the sleeve. In this way, the solvent can act against the other side of the control line blockage. | 08-20-2009 |
20090288834 | Dynamic scale removal tool - A scale removal tool with adjustably positionable fluid dispensing arms. The scale removal tool may be configured for delivery to within a hydrocarbon well via coiled tubing. Thus, fluid may be driven through the coiled tubing and through the tool at the fluid dispensing arms. The fluid may thereby be jetted at high pressure toward scale at the wall of the well in order to achieve its removal. In the case of a well having scale of varying thicknesses, the fluid dispensing arms may be dynamically positioned and repositioned while downhole in the well, depending on scale thickness. In this manner, the tool need not be removed from the well in order to reposition the fluid dispensing arms for optimum scale removal at each section of the well. As such, considerable time and expense of a scale removal application may be saved. | 11-26-2009 |
20100000738 | CLEANING APPARATUS AND METHODS - A method for cleaning debris from a wellbore having a top and a bottom comprising inserting cleaning tool comprising a coaxial pipe in the wellbore, pumping fluid through the cleaning tool to create a fluid flow in a direction towards the bottom of the wellbore, converting the fluid flow into rotary mechanical power, agitating the debris by cavitation with at least one vortex spinner having a plurality of spinner blades, and allowing the debris to flow towards the top of the wellbore thereby cleaning the wellbore. | 01-07-2010 |
20100025042 | DRILLING METHOD AND DOWNHOLE CLEANING TOOL - A method for drilling a well with a drilling apparatus comprising a drill string and a bit, comprising attaching a cleaning tool comprising a coaxial pipe and at least one vortex spinner to a portion of the drill string above the bit, inserting the drill string into a wellbore, extending the wellbore while simultaneously pumping fluid through the cleaning tool to create a fluid flow, and loosening debris attached to the wellbore. | 02-04-2010 |
20100051282 | Hydraulic Pump System for Deliquifying Low Rate Gas Wells - Water is removed from a natural gas well using a piston pump is driven by a power fluid that is pumped into the wellbore. The power fluid is intermixed within wellbore water and pumped out of the wellbore along with the removed water. | 03-04-2010 |
20100051283 | Subterranean Methods Of Processing Hydrocarbon Fluid-Containing Deposits and Hydrocarbon Recovery Arrangements For Recovering Hydrocarbon-Containing Fluid From Hydrocarbon-Containing Deposits - A subterranean method of processing a hydrocarbon fluid-containing deposit includes, from a subterranean room, providing a borehole into a deposit containing formation fluid comprising fluid hydrocarbon. The borehole has a first end at a wall of the subterranean room, and a second end remote from the subterranean room and received within the deposit. The first end is elevationally lower than the second end. A string of pipe is provided within the borehole from the subterranean room. A cuttings removal fluid is injected from the string of pipe into the borehole and against a wall of the borehole in underbalanced pressure conditions. One of drilling, reaming, or jetting is conducted within the borehole during said injecting of the cuttings removal fluid. Formation fluid comprising fluid hydrocarbon is flowed from the deposit into the borehole during said injecting of the cuttings removal fluid. The injected cuttings removal fluid and the formation fluid within the borehole are flowed at least in part by gravity downhole externally of the string of pipe in underbalanced pressure conditions within the borehole and into the subterranean room. Other implementations and aspects are contemplated. | 03-04-2010 |
20100101797 | Lubricating washpipe system and method - The invention relates to washpipes for use in drilling operations such as drilling for oil and gas, and more particularly to an auto lubricating washpipe and liner system and method. | 04-29-2010 |
20100132951 | Controlled De-functionalization of Filtercakes and Other Downhole Compositions - A method for the controlled de-functionalization of downhole polymers comprising contacting downhole, water-dispersible, polymeric material with a dehydrating agent until the water-dispersible polymeric material is sufficiently de-functionalized to be removed. The water-dispersible polymeric material can be found in the downhole formation of a filtercake on production walls, other downhole polysaccharide materials and in fluid loss pills. The contact between the dehydrating agent and the polymeric material is prolonged until the water-dispersible, polymeric material is sufficiently de-functionalized to allow the de-functionalized material to be removed by flushing the drilling fluid. The dehydrating agent is selected from concentrated inorganic salt solutions, concentrated organic salt solutions, acid anhydrides, esters, alcohols, ethers, ketones, aldehydes, amides, organic acids and mixtures thereof. | 06-03-2010 |
20100170676 | METHODS FOR CLEANING OUT HORIZONTAL WELLBORES USING COILED TUBING - Methods for cleaning out horizontal wellbores using coiled tubing are provided for use during downhole operations. A coiled tubing having a bottom hole assembly is deployed into a horizontal wellbore. Fluid is circulated down the annulus of the wellbore and up the bottom hole assembly while the bottom hole assembly is moved upward at a selected rate and distance. This method may be used to remove downhole solids, such as formation sands and proppant. | 07-08-2010 |
20110017464 | WELLBORE DEBRIS CLEANOUT WITH COILED TUBING USING DEGRADABLE FIBERS - Embodiments of this invention relate to a method of removing debris from a wellbore including contacting debris in a wellbore with a treatment fluid, wherein the fluid contains degradable fibers, collecting at least a portion of the treatment fluid, and allowing the degradable fibers to degrade. Embodiments of this invention also relate to a method of removing debris from a wellbore including contacting debris in a wellbore with a treatment fluid, wherein the fluid contains degradable fibers, collecting the treatment fluid, and exposing the fluid to a composition to encourage the degradable fibers to degrade. | 01-27-2011 |
20110056694 | Methods For Removing Paraffinic Hydrocarbon Or Bitumen In Oil Producing Or Disposal Wells - Disclosed is an improved process for removing heavy oil, bitumen and/or paraffinic materials in oil production or storage wells including onshore and offshore petroleum wells, petroleum residual disposal wells and Steam Assisted Gravity Drainage (SAGD) or Cyclic Steam Stimulation (CSS) producing wells used in the oil sands industry. This process helps restore the operating efficiency of organically contaminated hydrocarbon producing wells in a safe, fast and effective manner without the need to insert any equipment to mechanically remove organic contaminants. Used is a heated terpene-based chemical injected with or without steam following a hot water or steam pre-heat to create a very effective cleaning process. | 03-10-2011 |
20110139457 | System and method for lateral wellbore entry, debris removal, and wellbore cleaning - A method of servicing a wellbore is provided. The method comprises running a toolstring into a wellbore to a first depth, actuating a controllably rotating sub-assembly of the toolstring to rotate, and activating a pressure activated bendable sub-assembly of the toolstring to bend, wherein actuating the controllably rotating sub-assembly to rotate and activating the pressure activate bendable sub-assembly are performed in any sequence or concurrently. The method also comprises running the toolstring into the wellbore beyond the first depth and stabbing the toolstring into a window in a wall of the wellbore to enter a lateral wellbore, wherein no whipstock is used to facilitate stabbing into the window. The method further includes running the toolstring into the lateral wellbore and performing a wellbore servicing operation in the lateral wellbore. | 06-16-2011 |
20110168397 | APPARATUS FOR USE IN TOP FILLING OF TUBULARS AND ASSOCIATED METHODS - There is provided an apparatus ( | 07-14-2011 |
20120018163 | Water Well Cleaning Apparatus and Method - A method and system for cleaning the perforations of well casings employs a non-rotating tubing string attached to a hydraulic jet carrier body. The carrier body has outwardly extending arms which terminate in spray nozzles, each of the nozzles expelling a stream of fluid under pressure against the well casing with an inertial force. The nozzles are oriented on the carrier body such that the reactive force for each jet is directionally offset with respect to the central axis of the carrier, thereby creating a twisting moment tending to rotate the carrier body about its central axis. The nozzles are located a fixed distance from the carrier body which is between about ½ and 1½ inches from the well casing perforations in use. | 01-26-2012 |
20120118578 | Purging of Fiber Optic Conduits in Subterranean Wells - Purging of fiber optic conduits in subterranean wells. A downhole optical sensing system includes an optical line, at least two tubular conduits, one conduit being positioned within the other conduit, and the optical line being positioned within at least one of the conduits, and a purging medium flowed in one direction through one conduit, and flowed in an opposite direction between the conduits. A method of purging a downhole optical sensing system includes the steps of: installing at least two conduits and an optical line in a well as part of the sensing system, one conduit being positioned within the other conduit, and the optical line being positioned within at least one of the conduits; and flowing a purging medium through the conduits in the well, so that the purging medium flows in one direction through one conduit and in an opposite direction between the conduits. | 05-17-2012 |
20120145402 | DEBRIS REMOVAL METHOD AND ASSEMBLY - A method of removing debris from a well is disclosed, comprising RIH to required depth with coiled tubing having at least one closed check valve, moving a sleeve through the check valve to hold it open, opening a flow control valve located on the coiled tubing below the check valve; then reverse circulating a fluid to entrain debris in the wellbore and bring it to surface through the coiled tubing, before releasing the sleeve from the check valve; and POOH with the at least one check valve returned to the closed configuration. By holding the check valves open, reverse circulation can be performed in the well using coiled tubing, so sufficient lift can be achieved to bring the debris to surface even in underbalanced or low pressure wells. Safety measures can be maintained by having at least one check valve in the conventional closed configuration on RIH and POOH. The flow control valve allows the check valve to be opened or closed without pumping any fluid into the well and thus the sleeve can be moved to hold the check valve open with a relatively low pressure. | 06-14-2012 |
20120312539 | APPARATUS AND METHOD FOR WATER WELL CLEANING - A method and apparatus for cleaning a water well is presented. The apparatus utilizes a tool body having a plurality of discharge nozzles for jetting streams of filtered water at high pressure on to the inside wall surface of a casing across a water zone having slots or perforations. The nozzle streams are offset from the tool body imparting a rotational force. A rotary coupling is also utilized to limit the maximum rotation. The apparatus is lowered by a pre-determined length of coiled tubing to cleaning depth after which it is raised at a slow rate across the water zone. | 12-13-2012 |
20120325485 | METHOD OF REMOVING INORGANIC SCALES - The productivity of hydrocarbons from hydrocarbon-bearing calcareous or siliceous formations is enhanced by contacting the formation with a well treatment composition which contains a hydrofluoric acid source, a phosphonate acid, ester or salt thereof, a quaternary ammonium salt and an organosilane and, optionally, a boron-containing compound. | 12-27-2012 |
20130146295 | FILTER CAKE REMOVAL COMPOSITION FOR DRILLING FLUIDS AND METHOD OF USE THEREOF - Disclosed is a filter cake removal composition, and method of use thereof, for use in a wellbore for controlled removal of a filter cake present in a target production zone. The filter cake removal composition includes hydrochloric acid and an organic acid. The filter cake removal composition, when a mixture of the hydrochloric acid and the organic acid is applied to the filter cake in the target production zone, is operable to dissolve the filter cake in the target production zone over an extended reaction time. The mixture includes the hydrochloric acid present in an amount of between about 0.1% and 5% by weight and the organic acid present in an amount of between about 0.1% and 10% by weight. | 06-13-2013 |
20130213659 | BREAKER AND DISPLACEMENT FLUID - A breaker fluid for breaking a filtercake in a wellbore. The fluid including a hydrolysable ester of carboxylic acid, and a chelant, an alkyl glycoside, or a combination thereof. The breaker fluid may be pre-mixed and include an amount of water less than required to completely hydrolyze the ester. | 08-22-2013 |
20130333893 | Submersible Progressive Cavity Pump Driver - In a rotary pump having a rotor and a stator in communication with hydrocarbon production tubing, a submersible pump driver assembly includes a drive motor having an output connected by a drive link to the rotor of the pump. A production housing of the drive assembly includes a production passage receiving the drive link in which the output axis of the drive motor is radially offset from the passage. A control line for providing a drive input to the motor is thus suited to extend alongside the production tubing. The driver assembly thus allows for flushing with only a coiled tubing unit as the coiled tubing can be readily inserted past the offset motor and the motor can be optionally run in reverse to improve flushing. | 12-19-2013 |
20140014350 | CIRCULATING COIL CLEANOUT TOOL AND METHOD - The invention relates to a tool and method for cleaning a wellbore. The tool includes a tubing string comprising an upper end and a lower end, and defining a first bore for allowing passage of fluid from the wellbore to surface; a guide string disposed inside the tubing string and defining an internal bore to run coiled tubing therethrough, the coiled tubing carrying at least one jet nozzle; at least one seal disposed around the tubing string for sealing against a well casing; at least one port defined by the tubing string and positioned above the seal for allowing fluid to pass therethrough; and at least one valve positioned below the seal to allow fluid to pass upward through the valve but not downward. | 01-16-2014 |
20140060845 | FLUID COMPOSITION FOR WELLBORE AND PIPELINE CLEANOUT AND METHOD OF USE THEREOF - A fluid composition for cleanout of wellbores and pipe systems includes an effective amount of an amphiphilic chemical combined with an effective amount of a friction reducer in an aqueous solution of a base liquid. A remainder of the composition includes the base liquid. | 03-06-2014 |
20140076573 | Casing Debris Cleaner - A downhole tool cleans debris from a subsea well with nozzle assemblies that selectively deploy from the tool. The nozzle assemblies are in fluid communication with an annulus of a drill pipe on which the downhole tool is mounted, so that fluid pumped into the drill pipe discharges from nozzles provided with the nozzle assemblies. The nozzle assemblies are strategically situated so that when deployed, a stream discharged from nozzles on the assemblies clears debris from a surface between a casing hanger and wellhead housing. The nozzle assemblies are coupled to an annular piston coaxially set on the tool; and sliding the piston axially along the tool deploys the nozzle assemblies. Axially spaced apart ports extend radially through the tool to opposing faces on a head of the piston. Blocking one of the ports with a ball dropped down the drill pipe moves the piston and deploys the assemblies. | 03-20-2014 |
20140110121 | New Environmentally Friendly Fluid to Remove Mn3O4 Filter Cake - Disclosed is a two-stage filter cake removal composition, and method of use thereof, for use in a wellbore for controlled removal of a filter cake present in a target production zone. The two-stage filter cake removal composition may include an enzyme present in an amount of between about 1% and 10%, and a glycolic acid in amounts of between about 1% and 10% by weight. Optionally, hydrochloric acid may be added to the glycolic acid, in an amount of about 1 and 5% by weight. The two-stage filter cake removal composition, when the enzyme is applied to the filter cake in the target production zone in a first stage and the glycolic acid is applied to the filter cake in the target production zone in a second stage, is operable to remove the filter cake in the target production zone over a predetermined extended reaction time. | 04-24-2014 |
20140262300 | SCRUBBING DEBRIS FROM A BORED WELL - The present disclosure provides methods and compositions for scrubbing debris from a bored well and includes injecting a suspension of acrylonitrile fibers, into the bored well to its open end. The suspension of acrylonitrile fibers scrubs the bored well of loose debris without substantially impeding the drilling capability of the rig by raising the effective liquid viscosity in the bored well. Also provided are pre-measured form factors of the acrylonitrile fibers for convenient and precise preparation of the acrylonitrile fiber suspension at the bored well site. | 09-18-2014 |
20140311746 | USE OF CHELANTS IN FORMATE-BASED SOLUTIONS TO DISSOLVE RESIDUAL FILTERCAKES IN SUBTERRANEAN WELLS - A wellbore fluid for dissolving a filtercake includes a chelating agent and an aqueous solution of carboxylate salt. The concentration of the chelating agent is up to 50 percent volume per volume (v/v) in the aqueous solution of carboxylate salt. A method of treating a well includes preparing a wellbore fluid up to 50 percent volume per volume (v/v) chelating agent in an aqueous solution of carboxylate salt. The method further includes emplacing the wellbore fluid downhole such that the wellbore fluid dissolves a filtercake in the well. | 10-23-2014 |
20140338916 | Methods and Compositions of Improving Wellbore Cleanout Treatments - Methods of performing a cleanout treatment including providing a wellbore in a subterranean formation having unconsolidated particulates therein; providing a treatment fluid comprising an aqueous base fluid and a hydrophobically modified flocculating water-soluble polymer; introducing the treatment fluid into the wellbore in the subterranean formation; flocculating at least a portion of the unconsolidated particulates by exposure to the hydrophobically modified flocculating water-soluble polymer; removing the treatment fluid comprising the flocculated unconsolidated particulates from the wellbore in the subterranean formation. | 11-20-2014 |
20140374112 | FLUID COMPOSITION FOR WELLBORE AND PIPLELINE CLEANOUT AND METHOD OF USE THEREOF - A fluid composition for cleanout of wellbores and pipe systems includes an effective amount of an amphiphilic chemical combined with an effective amount of a friction reducer in an aqueous solution of a base liquid. A remainder of the composition includes the base liquid. | 12-25-2014 |
20150027714 | Swelling Debris Barrier and Methods - The present invention provides systems and methods for protecting the lower main wellbore of whipstocks and completion deflectors from debris accumulation. A well system subassembly includes a deflector tool arranged within a casing string and defining a deflector surface and an inner bore extending longitudinally from the deflector surface and one or more seal stacks disposed about the inner bore of the deflector tool. A wellbore barrier device is disposed about the inner bore uphole from the one or more seal stacks and is expandable from an unswelled configuration to a swelled configuration. When the wellbore barrier device is in the swelled configuration, it protects the one or more seal stacks from debris generated from milling and/or drilling operations. | 01-29-2015 |
20150090458 | PULSATING ROTATIONAL FLOW FOR USE IN WELL OPERATIONS - A system for use with a subterranean well can include a fluid oscillator which discharges pulsating fluid from a tubular string in a direction at least partially toward an end of the tubular string proximate a surface of the earth. A method can include discharging a fluid from the tubular string, thereby applying a reaction force to the tubular string, which reaction force biases the tubular string at least partially into the well. Another method can include discharging a pulsating fluid from a fluid oscillator in a direction at least partially toward an end of the tubular string, and drilling into an earth formation with a drill bit connected at an opposite end of the tubular string in the well. | 04-02-2015 |
20150122500 | SHAKER SCREEN ASSEMBLY - A scalping insert includes a scalping surface having a plurality of scalping slots therethrough, and a vertical base portion. A shaker screen assembly includes a screen frame having at least one slot, and at least one scalping insert disposed in the at least one slot of the screen frame. A method of processing fluid includes providing a flow of fluid to a shaker screen assembly; and flowing the fluid through a scalping surface and a screen surface of a single shaker screen deck. | 05-07-2015 |
20150308232 | DOWNHOLE CLEANING SYSTEM - The present invention relates to a downhole cleaning system for cleaning an element inside a casing in a wellbore comprising well fluid having a wellbore pressure, comprising the casing, a cleaning tool having a longitudinal direction and comprising a rotatable nozzle head having a plurality of nozzles, a tool housing having an inlet being in fluid communication with the nozzles for jetting well fluid into the tool, a flow hindering element arranged on an outside of the housing dividing the tool in a first and a second tool part and dividing the casing in a first and a second casing part and a rotatable shaft connecting the nozzle head with the housing, wherein the system further comprises a pumping device for pressurising the well fluid in the first part of the casing to a pressure substantially above the wellbore pressure and above a pressure in the second part of the casing so that well fluid is pumped in through the inlet and out through the nozzles. Furthermore, the invention relates to a wireline cleaning tool and to a cleaning method. | 10-29-2015 |
20150329764 | TREATMENT FLUIDS CONTAINING A BORON TRIFLUORIDE COMPLEX AND METHODS FOR USE THEREOF - Treatment fluids for use in subterranean formations, particularly sandstone and other siliceous formations, may contain a source of fluoride ions to aid in mineral dissolution. In some cases, it may be desirable to generate the fluoride ions from a fluoride ion precursor, particularly a hydrofluoric acid precursor, such as a boron trifluoride complex. Methods described herein can comprise providing a treatment fluid that comprises an aqueous base fluid, a boron trifluoride complex, and a chelating agent composition, and introducing the treatment fluid into a subterranean formation. | 11-19-2015 |
20160040504 | Suction Nozzle - A system, method and apparatus for cleaning a wellbore is disclosed. A workstring is conveyed in a wellbore. A jet sub provided associated with the wellbore, wherein the jet sub includes at least one nozzle, the nozzle including: a nozzle body; a bore formed in the nozzle body, the bore having an outlet; and a plurality of inlet jets disposed tangentially about the bore and opposite the outlet of the bore. A completion fluid is provided to the at least one nozzles via the work string and jet sub. The completion fluid is expelled via the at least one nozzles. | 02-11-2016 |
20160040505 | HIGH EFFICIENCY NOZZLE - A system, method and apparatus for cleaning a wellbore is disclosed. A workstring is conveyed in a wellbore. A jet sub provided associated with the wellbore, wherein the jet sub includes at least one nozzle, the nozzle including: an inlet; an outlet; at least four successive concentric stages in fluid communication with the inlet and the outlet, wherein each of the at least four stages has a discrete length, and the stages have progressive smaller discrete diameters, and an interface formed between each stage. A completion fluid is provided to the at least one nozzles via the work string and jet sub. The completion fluid is expelled via the at least one nozzles. | 02-11-2016 |
20160097259 | METHOD FOR REMEDIATING A SCREEN-OUT DURING WELL COMPLETION - A method of completing a well involving remediating a condition of screen-out that has taken place along a zone of interest. The method includes forming a wellbore, and lining at least a lower portion of the wellbore with a string of production casing and placing a valve along the production casing, wherein the valve creates a removable barrier to fluid flow within the bore. The barrier is removed by moving the valve in the event of a screen-out. This overcomes the barrier to fluid flow, thereby exposing ports along the production casing to the subsurface formation at or below the valve. Additional pumping takes place to pump the slurry through the exposed ports, thereby remediating the condition of screen-out. | 04-07-2016 |
20160097260 | METHOD FOR REMEDIATING A SCREEN-OUT DURING WELL COMPLETION - A method of completing a well involving remediating a condition of screen-out that has taken place along a zone of interest. The method includes forming a wellbore, and lining at least a lower portion of the wellbore with a string of production casing and placing a valve along the production casing, wherein the valve creates a removable barrier to fluid flow within the bore. The barrier is removed by moving the valve in the event of a screen-out. This overcomes the barrier to fluid flow, thereby exposing ports along the production casing to the subsurface formation at or below the valve. Additional pumping takes place to pump the slurry through the exposed ports, thereby remediating the condition of screen-out. | 04-07-2016 |
20160102239 | MICROEMULSIONS, MESOPHASE SURFACTANT AND MICELLAR SOLUTIONS, AND IN SITU-FORMED FLUIDS FORMULATED WITH HIGH DENSITY BRINE - Mesophase surfactant solutions and/or micellar solutions, pre-formed single phase microemulsions (SPMEs), and in situ-formed fluids may be used to clean up and remove hydrocarbons and synthetic oils such as oil-based mud filter cake and near wellbore damage in oil and gas wells. Removal occurs by solubilization of the hydrocarbons and synthetic oils into the micellar solutions, SPME, in situ-formed fluids, etc. when the fluid formulation contacts the hydrocarbons and synthetic oils. An in situ-formed fluid (e.g. microemulsion), may be formed when one or more surfactant, an optional linker, optional co-surfactant, optional acid, optional cosolvent and a polar high-density brine phase, and eventually some amount of organic phase, contacts the subterranean location and solubilizes the hydrocarbons and synthetic oils encountered, such as in the near wellbore of a subterranean formation. The micellar solutions, microemulsions, in situ-formed fluids, etc. are effective for removing the formation damage caused by hydrocarbons and synthetic oils. | 04-14-2016 |
20160130497 | ENCAPSULATED INTERNAL FILTER CAKE BREAKERS WITH IMPROVED RELEASE PROPERTIES - A wellbore fluid including a peroxide degradable polymer and an encapsulated peroxide source. The peroxide degradable polymer may be a polysaccharide. The peroxide source may include an inorganic peroxide, including zinc and alkaline earth metal peroxides, such as magnesium peroxide. The encapsulating material may be a polymer, including a metal crosslinked acrylic polymer. The release of peroxide, from peroxide sources generally, can be controlled by means of pH such that peroxide source can be activated, and peroxide released, by a change in pH. In a wellbore, this pH change can be effected by using produced fluids to lower the pH of a more basic wellbore fluid. | 05-12-2016 |
20160177168 | COMPOSITION AND METHOD FOR REMOVING PIPE DOPE | 06-23-2016 |
20170232407 | In-Line Well Fluid Eduction Blending | 08-17-2017 |