| Patents for E21B 23 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells (12,712) |
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| 06/09/1992 | CA1302874C T-slot mandrel and kickover tool |
| 06/02/1992 | US5117915 Well casing flotation device and method |
| 06/02/1992 | US5117912 Method of positioning tubing within a horizontal well |
| 06/02/1992 | US5117685 Apparatus for testing an oil well, and corresponding method |
| 06/02/1992 | CA1302238C Liner setting assembly |
| 05/26/1992 | CA1301640C Hydraulic setting tool |
| 05/26/1992 | CA1301638C Pressure actuated cleaning tool |
| 05/22/1992 | CA2055659A1 Tension-actuated mechanical detonating device useful for detonating downhole explosive |
| 05/19/1992 | US5113938 Whipstock |
| 05/19/1992 | CA1301147C Apparatus for controlling the operation of a downhole tool |
| 05/13/1992 | EP0485243A1 A release mechanism |
| 05/13/1992 | CN1061069A Oil tool release joint |
| 05/12/1992 | US5111903 Signal receiving system able to be coupled with the wall of a well or drilling |
| 05/12/1992 | US5111884 Method and apparatus for reworking wells |
| 05/12/1992 | US5111880 System for driving a non rigid exploration device into a well where its progression by gravity is difficult |
| 05/12/1992 | CA1300492C Apparatus for treating well bores |
| 05/06/1992 | EP0484218A1 Work-over device for non eruptive deviated wells |
| 05/06/1992 | CN2103633U Tool clamping device in petroleum well |
| 05/05/1992 | CA1300284C Methods and apparatus for safely handling radioactive sources in measuring-while-drilling tools |
| 04/29/1992 | EP0295291B1 System for moving a set of instruments and measurements and/or interventions method in a well |
| 04/28/1992 | US5107939 Electrically conducting an orientation signal in a directionally drilled well |
| 04/28/1992 | US5107927 Orienting tool for slant/horizontal completions |
| 04/22/1992 | CN2102366U Wheel type well dredging machine with special base |
| 04/21/1992 | US5105878 Electrical system including a connector, cable and cartridge for slant hole drilling |
| 04/16/1992 | WO1992006270A2 Valve control apparatus |
| 04/16/1992 | WO1992006269A1 Release joint |
| 04/15/1992 | EP0296209B1 Method and device for taking measurements and/or carrying out interventions in a substantially inclined well portion and its application to the achievement of seismic profiles |
| 04/15/1992 | CN2101745U Assembly tools for packer bottom flange double metric short pitch |
| 04/14/1992 | US5103912 Method and apparatus for completing deviated and horizontal wellbores |
| 04/14/1992 | US5103902 Non-rotational versa-trieve packer |
| 04/14/1992 | CA1298779C Bottom hole shut-in tool |
| 04/08/1992 | CN2101102U Hydraulic clamp handle safety locking device |
| 04/07/1992 | US5101907 Differential actuating system for downhole tools |
| 04/07/1992 | US5101897 Slip mechanism for a well tool |
| 04/07/1992 | US5101895 Well abandonment system |
| 04/02/1992 | WO1992005336A1 Horizontal inflatable tool |
| 04/01/1992 | EP0477452A2 Downhole force generator |
| 04/01/1992 | EP0296207B1 Method and device for taking measurements and/or carrying out interventions in a well subjected to a hydraulic compression |
| 03/31/1992 | US5099919 Plug for well logging operations |
| 03/20/1992 | CA2051724A1 Whipstock assembly with hydraulically set anchor |
| 03/18/1992 | EP0475830A1 Method and plug for the permanent closure of a storage well |
| 03/17/1992 | US5095993 Anchor apparatus for a tubing and wireline conveyed method and apparatus |
| 03/17/1992 | US5095979 Apparatus for operating a downhole tool using coil tubing |
| 03/17/1992 | US5095978 Hydraulically operated permanent type well packer assembly |
| 03/03/1992 | US5092423 Downhole seismic array system |
| 03/03/1992 | US5092402 Tubing end locator |
| 03/03/1992 | CA1296577C Hinged jet pump, particularly for activating water or hydrocarbon producing wells |
| 02/27/1992 | DE4026509A1 Borehole piston pump drive rod subjected only to tensile loads - is made from high tensile plastic material and only subjected to tensile load |
| 02/26/1992 | EP0294440B1 Probe and its multidirectional anchoring device in a well |
| 02/19/1992 | CN2096632U Tool stage for well |
| 02/11/1992 | US5086845 Liner hanger assembly |
| 02/11/1992 | US5086844 Hydraulic release oil tool |
| 02/11/1992 | US5086843 Oil tool release joint |
| 02/01/1992 | CA2047588A1 Hydraulically set anchor for well tools |
| 01/30/1992 | DE4024000A1 Centralisers for oil well casings |
| 01/29/1992 | EP0468668A2 Rotary locking system with metal seals |
| 01/28/1992 | US5083609 Down hole jet pump retrievable by reverse flow and well treatment system |
| 01/26/1992 | CA2046805A1 Rotary locking system with metal seals |
| 01/22/1992 | EP0467573A2 Subsurface pressure actuated well apparatus |
| 01/21/1992 | US5082062 Horizontal inflatable tool |
| 01/21/1992 | US5082061 Rotary locking system with metal seals |
| 01/21/1992 | CA1294538C Method of logging an inclined wellbore |
| 01/14/1992 | US5080175 Use of composite rod-stiffened wireline cable for transporting well tool |
| 01/14/1992 | CA1294214C Apparatus for retaining axial movement relative to a cylindrical housing |
| 01/10/1992 | CA2046470A1 Method and apparatus for actuating a downhole tool |
| 01/08/1992 | EP0465316A1 Apparatus for stimulating production and for logging for non-eruptive wells |
| 01/08/1992 | EP0464340A2 Apparatus and method for inserting a pump within a conduit |
| 01/07/1992 | CA2003534C Attachment for an oil well screw pump system |
| 01/02/1992 | EP0463939A1 Method and apparatus for conducting logging or work-over operations in a borehole |
| 12/31/1991 | US5076392 Method and apparatus for forcing a member through material such as soil and obtaining samples therefrom |
| 12/26/1991 | WO1991019881A1 Improved side pocket mandrel |
| 12/24/1991 | US5074362 Finger nut setting tool and liner hanger assembly |
| 12/24/1991 | US5074355 Section mill with multiple cutting blades |
| 12/24/1991 | CA1293556C Downhole electromagnetic seismic source |
| 12/18/1991 | CN1057088A Hydraulic oil well repairing machine with energy storage |
| 12/11/1991 | EP0460902A2 Drill pipe bridge plug and method of use |
| 12/10/1991 | US5070941 Downhole force generator |
| 12/04/1991 | EP0459610A2 Milling tool for well casings |
| 12/04/1991 | EP0459008A2 Drilling tool for directional drilling |
| 12/03/1991 | US5069280 Gravel packer and service tool |
| 11/26/1991 | US5067854 Apparatus and technique for installing an elongated rod in an earth formation |
| 11/21/1991 | EP0457644A1 Borehole receiver system for acoustic waves with mechanical decoupling of the sensors |
| 11/19/1991 | US5066060 Running tool |
| 11/14/1991 | WO1991008370A3 Device for steering the foremost part of a drill pipe |
| 11/13/1991 | EP0456526A1 Apparatus and method for adjusting the azimut of the trajectory of a rotary drilling tool |
| 11/05/1991 | CA2041788A1 Deployment and recovery of pre-packed screens |
| 10/31/1991 | WO1991016520A1 A borehole, as well as a method and an apparatus for forming it |
| 10/30/1991 | EP0454560A1 Wireline and coiled tubing retrievable choke for downhole flow measurement |
| 10/30/1991 | EP0454465A2 External sleeve downhole cementing tool |
| 10/29/1991 | US5060751 Pneumatic wall-locking geophone system |
| 10/23/1991 | EP0453354A2 Intra-perforating gun swivel |
| 10/23/1991 | EP0452397A1 Wireline releasing device and method of releasing wireline |
| 10/22/1991 | US5058684 Drill pipe bridge plug |
| 10/22/1991 | US5058683 Wet connector |
| 10/22/1991 | US5058680 Method of detonating a perforating apparatus on a tubing including lowering one end of a pump and a firing head into said tubing |
| 10/22/1991 | US5058672 Landing collar and float valve assembly |
| 10/22/1991 | US5058671 Pipe insert assembly |
| 10/22/1991 | US5058670 Oriented valve and latch for side pocket mandrel |
| 10/22/1991 | CA1291189C Adjustable collet |
| 10/16/1991 | EP0452126A2 Apparatus for orienting perforating gun |