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| Number | Title | Issue Date |
| 7721799 | Flow control packer (FCP) and aquifer storage and recovery (ASR) system A flow control packer (FCP) includes a packer mandrel, and an inflatable element fixedly attached at each end to the mandrel. The inflatable element includes circumferential grooves and flow control grooves formed on an outside surface thereof configured to press ag... | 05/25/2010 |
| 7325621 | Method and apparatus for ECP element inflation utilizing solid laden fluid mixture An inflatable element utilizing a solid or particulate laden fluid as an expansion media. A fluid component of the solid or particulate laden fluid is exhausted from a defined area of the element to leave substantially only particulate matter therein to maintain the... | 02/05/2008 |
| 7318475 | Matrix acidizing high permeability contrast formations A method for stimulating thick or multilayered heterogeneous or homogeneous formations in a single trip without packers involves perforating with tubing conveyed perforation, then injecting a self-diverting acid, then moving the tubing string and perforating at a ne... | 01/15/2008 |
| 7284619 | Packer with positionable collar A fluid actuated packer 10 and collar 36 assembly is provided for positioning on a tubular member 12. The collar 36 is moveable by a running tool 110 positioned within the tubular member and has a closed position and a packer activ... | 10/23/2007 |
| 7191844 | Inflate control system for inflatable straddle stimulation tool A method and apparatus for controlling inflation and deflation of spaced inflatable packer elements of a straddle stimulation tool within a well casing of a well. A straddle stimulation tool is positioned by tubing at a desired location within the well casing. Fluid... | 03/20/2007 |
| 7178603 | Method and apparatus for ECP element inflation utilizing solid laden fluid mixture An inflatable element utilizing a solid or particulate laden fluid as an expansion media. A fluid component of the solid or particulate laden fluid is exhausted from a defined area of the element to leave substantially only particulate matter therein to maintain the... | 02/20/2007 |
| 7159660 | Hydrajet perforation and fracturing tool Methods and apparatus for fracturing a subterranean formation which use a fracturing tool. The fracturing tool includes a hydrajet tool, with at least one fluid jet and at least one fracturing port extending through the liner. The fracturing tool further includes a ... | 01/09/2007 |
| 7134491 | Leak remedy through sealants in local reservoirs The present invention provides a method for remedying minute seal leaks in downhole tools and equipment. The various embodiments of the present invention utilize pressure activated liquid sealants stored in local reservoirs to remedy such leaks. ... | 11/14/2006 |
| 7121347 | Liquid sampler A method and an apparatus raise samples of liquid such as water from a low level to a higher level, for example for obtaining a sample of groundwater from a borehole. The apparatus comprises a pair of tubes (14 and 16) extending alongside each other, w... | 10/17/2006 |
| 7066264 | Method and apparatus for treating a subterranean formation A service/completion liner having a plurality of downhole selectable indicating tools and being used in sand control (gravel pack) placement systems in conjunction with a straddle packer service tools or with conventional crossover type service tools. Each indicatin... | 06/27/2006 |
| 7055598 | Fluid flow control device and method for use of same A fluid flow control device (60) for use in a wellbore to control the inflow of production fluids comprises a sand control screen (62) having a base pipe (64) with a first set of openings (66) that allows the production fluids to flow the... | 06/06/2006 |
| 7044221 | Apparatus for coupling a tubular member to a preexisting structure An apparatus for coupling a tubular member to a preexisting structure. ... | 05/16/2006 |
| 7017670 | Apparatus and method for expanding and fixing a tubular member within another tubular member, a liner or a borehole An apparatus for securing a tubular member within a liner or borehole has a seal means connected within the tubular member, and a pressure control device operable to increase the pressure within the tubular member, such that operation of the pressure control means c... | 03/28/2006 |
| 7011157 | Method and apparatus for cleaning a fractured interval between two packers A method and apparatus for fluid treatment of a selected interval of a well and then cleaning the selected interval and the apparatus of treatment residue. An straddle tool is run into the well to treatment depth on fluid supplying tubing and has upper and lower pac... | 03/14/2006 |
| 6612372 | Two-stage downhole packer A two-stage packer and method for sealing an annulus in a wellbore is provided. The packer may be set by a force which will not cause a sealing element to buckle, collapse, or otherwise fail. In one aspect, the packer comprises a body having a sealing ele... | 09/02/2003 |
| 6527050 | Method and apparatus for formation damage removal A method of removing formation damage through the controlled injection of fluids into the formation, followed by a controlled sudden release of pressure in the formation, an under-balanced surge, which causes fluid and damaging materials to flow back into... | 03/04/2003 |
| 6357525 | Method and apparatus for testing a well A test system and method for testing a well having a first and second zone includes a chamber and an isolation device moveable in the chamber. The isolation device separates a first and a second portion of the chamber. The chamber is adapted to receive fl... | 03/19/2002 |
| 6328103 | Methods and apparatus for downhole completion cleanup A method of performing a downhole well completion cleanup is provided. In a described embodiment, completion fluids from a first zone are flowed into a tubular string, and then the fluids are discharged into a second zone. An apparatus usable in the metho... | 12/11/2001 |
| 6065544 | Method and apparatus for multiple packer pressure relief A system for relieving pressurized fluid entrapped in a annular space between a casing (12) and the surrounding wall (11) of a well bore hole (10) during deployment of a packer exterior (14) of the casing (12) for sealing engagement with the wall (11). Wh... | 05/23/2000 |
| 6012518 | Electro-hydraulic well tool actuator An electro-hydraulic well tool actuator is provided to control fluid-actuated well tools. The actuator may include a cylindrical housing at least one hydraulic fluid flowpath within the housing, a communication link sealably connected to the housing on on... | 01/11/2000 |
| 5873414 | Bypass valve for downhole motor A bypass valve, particularly useful for allowing a tubing string to fill or drain during tripping in and tripping out, is disclosed. The bypass valve can be used in conjunction with a downhole motor operated through a tubing string. The bypass valve featu... | 02/23/1999 |
| 5799733 | Early evaluation system with pump and method of servicing a well An early evaluation system with pump for servicing a well and taking fluid samples and measurements. In each of the embodiments, a formation pump is actuated to flow fluid from the well formation below a packer element engaged with the borehole into a sam... | 09/01/1998 |
| 5671809 | Method to achieve low cost zonal isolation in an open hole completion A low cost zonal isolation technique for use in open hole well completions and workovers is disclosed. A production liner, tubing string, casing string or coiled tubing is provided with spaced apart pairs of sealing means having at least one hole drilled ... | 09/30/1997 |
| 5507343 | Apparatus for repairing damaged well casing A method and apparatus for repairing or isolating holes, ruptures, splits or old perforations in marginal oil and gas wells from producing perforations. The apparatus includes two packer assemblies, a tube assembly and a slip assembly. The packer assembli... | 04/16/1996 |
| 5377750 | Sand screen completion A sand screen having a plurality of sintered, substantially spherical plastic members covering a perforated mandrel is releasably suspended from a packer mandrel by a locking mandrel and a landing nipple. The sand screen and locking mandrel are retrievabl... | 01/03/1995 |
| 5303776 | Device for a down-hole assembly A wireline conveyable device for a fluid operable borehole tubing assembly comprising a tubular body having a first end intended to form the upper end when in the borehole and a second open end intended to form the lower end. The tubular body includes at ... | 04/19/1994 |
| 5295538 | Sintered screen completion A sintered metal screen is releasably suspended from a packer mandrel by a locking mandrel and a landing nipple. The sintered metal screen and locking mandrel are retrievable with the assistance of a running tool which is insertable into the bore of the l... | 03/22/1994 |
| 5186258 | Horizontal inflation tool A well tool having an anchor device, straddle packers above and below a port and an internal valve which are operated by longitudinal motion in an inflatable packer device. The well tool anchor is armed by a hydraulic operated plug and set upon downward m... | 02/16/1993 |
| 5012871 | Fluid flow control system, assembly and method for oil and gas wells A fluid flow control system, assembly and method for wells in which a sliding sleeve valve is connected in a string of well tubing in a wellbore casing. The sliding sleeve valve functions to selectively control the lateral flow of fluid through the assemb... | 05/07/1991 |
| 4794989 | Well completion method and apparatus There is disclosed apparatus for use in completing oil or gas wells having two or more perforated production zones which includes packers and assemblies for closing off the annular space between the tubing string and the well bore intermediate adjacent zo... | 01/03/1989 |
| 4718496 | Method and apparatus for the completion of an oil or gas well and the like Apparatus for isolating a formation, isolating a damaged section of casing, and for pressure testing the apparatus when located in a cased well bore. The apparatus includes a first packer that is in sealing engagement with the casing for isolating the for... | 01/12/1988 |
| 4717473 | Apparatus for time-averaged or composite sampling of chemicals in ground water The ground-water sampler collects a time-averaged or composite sample of the ground water. The sampling system was designed to be self-contained and all sources of power being contained within the well casing. The sampler collects the sample on a sorptive... | 01/05/1988 |
| 4671352 | Apparatus for selectively injecting treating fluids into earth formations In the representative embodiment of the invention described herein, formation-treating apparatus is adapted to be dependently supported in a well bore from a pipe string and which includes upper and lower telescoped body members adapted to be selectively ... | 06/09/1987 |
| 4640351 | Sealing packer A packer for a down hole oil well includes an inner mandrel assembly having an upper outer sleeve assembly that includes the hold down mechanism and upper packer seals with a piston on the underside of the packing seals to be pressure responsive and to de... | 02/03/1987 |
| 4580632 | Well tool for testing or treating a well A testing or treating tool enables either squeeze packer elements or inflatable packer elements to isolate an interval of the well bore. A pump provides hydraulic pressure to move the packer elements into sealing engagement with the well bore wall by mani... | 04/08/1986 |
| 4567944 | Retrievable straddle packer An improved retrievable compression set straddle packer assembly for use in oil and gas wells. The straddle packer assembly comprises an upper hydraulic slip assembly, an upper packer assembly, a bypass assembly, a lower packer assembly, a lower mechanica... | 02/04/1986 |
| 4519456 | Continuous flow perforation washing tool and method A continuous flow well bore perforation washing tool is shown of the type having a tubular mandrel with sidewalls defining a flow passage, an upper end for connection in a pipe string and a lower end with means for blocking the flow of fluid from the pipe... | 05/28/1985 |
| 4350205 | Work over methods and apparatus Methods and apparatus for isolating the producing zone of a well during workover operations, particularly where the well is equipped with a production string and a submersible electric pump suspended thereon. A packer and isolation valve are set in the we... | 09/21/1982 |
| 4279306 | Well washing tool and method A well washing tool which may comprise: a tubular mandrel; first and second packer assemblies carried on the mandrel at opposite ends thereof; an outer tubular body surrounding the mandrel between the packer assemblies; an annular chamber between the mand... | 07/21/1981 |
| 4270761 | Seal for geothermal wells and the like A seal for use in high temperature, aggressive environments, such as a geothermal well, including a ring-shaped element of a polymer, such as tetrafluoroethylene/perfluoro (alkyl vinyl ether) copolymer, which is substantially crystalline at room temperatu... | 06/02/1981 |
