| 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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| 06/11/1996 | US5524708 Non-metallic oil well tubing system |
| 06/05/1996 | EP0715056A2 Blanking plug assembly |
| 06/05/1996 | CN2228636Y Two-purpose stove for water boiling and warming |
| 05/29/1996 | EP0713953A2 Method of drilling and completing wells |
| 05/29/1996 | EP0713951A2 Method of drilling and completing wells |
| 05/26/1996 | CA2162942A1 Hydraulically actuated fishing tool |
| 05/22/1996 | EP0712499A1 Improved slick line system with real-time surface display |
| 05/21/1996 | US5518073 Mechanical lockout for pressure responsive downhole tool |
| 05/21/1996 | US5518072 Downhole tool for assisting in separating and reconnecting well tubing |
| 05/17/1996 | WO1996014544A1 Subterranean heat exchange units comprising multiple secondary conduits and multi-tiered inlet and outlet manifolds |
| 05/17/1996 | CA2157838A1 Apparatus for locking wire line instrument to drill collar |
| 05/15/1996 | DE4440550A1 Device for inserting probe into bore hole |
| 05/14/1996 | US5515880 Spoolable coiled tubing mandrel and gas lift valves |
| 05/08/1996 | EP0710318A1 Zone isolation apparatus |
| 05/07/1996 | US5513703 Methods and apparatus for perforating and treating production zones and otherwise performing related activities within a well |
| 05/07/1996 | US5513570 Pressure actuated pipe cutting tool |
| 05/02/1996 | WO1996012865A1 Tubing conveyed perforating system with completion fluid loss control |
| 05/01/1996 | CN1121555A Tool for transporting cutting means to and from a ground drill |
| 05/01/1996 | CN1121554A Insert for releasably retaining cutting means in a ground drill |
| 05/01/1996 | CN1121553A Bit segments for a ground drill bit |
| 05/01/1996 | CN1121552A Drive sub |
| 04/30/1996 | US5511614 Hydraulic system for servicing water pumps in wells |
| 04/24/1996 | EP0502084B1 Device for steering the foremost part of a drill pipe |
| 04/23/1996 | US5509481 Method of perforating including an automatic release apparatus suspending by wireline or coiled tubing in a wellbore for perforating a long length interval of the wellbore in a single run using a gun string longer than a wellhead lubricator |
| 04/23/1996 | US5509476 Short wellhead plug |
| 04/17/1996 | CN2224912Y Hydraulic pipe withdrawing apparatus for pipes in wells |
| 04/16/1996 | US5507349 Downhole coiled tubing latch |
| 04/16/1996 | US5507348 Apparatus for locking wire line instrument to drill collar |
| 04/16/1996 | US5507346 Composite well flow conductor |
| 04/09/1996 | US5505261 Firing head connected between a coiled tubing and a perforating gun adapted to move freely within a tubing string and actuated by fluid pressure in the coiled tubing |
| 04/03/1996 | EP0704598A2 Tool for use in a wellbore testing string |
| 04/02/1996 | US5503224 Casing drive apparatus |
| 03/31/1996 | CA2156129A1 Multi-mode well tool with hydraulic bypass assembly |
| 03/28/1996 | WO1996009461A1 Apparatus for sensor installation in wells |
| 03/28/1996 | WO1996009460A2 Apparatus for milling a well casing |
| 03/27/1996 | EP0702746A1 System for in situ replacement of cutting means for a ground drill |
| 03/27/1996 | EP0559735B1 Plugs for well logging operations |
| 03/26/1996 | US5501281 Torque-resistant, seal setting force-limited, hydraulically settable well packer structure and associated methods |
| 03/21/1996 | WO1996008635A2 Apparatus for the remote deployment of valves |
| 03/19/1996 | US5499682 Method for setting a slotted face wellbore deviation assembly using a rectilinear setting tool |
| 03/19/1996 | US5499681 Centralizing liner hanger method and system for subterranean multilateral well drilling |
| 03/19/1996 | US5499680 Diverter, diverter retrieving and running tool and method for running and retrieving a diverter |
| 03/19/1996 | CA2055007C Method of and apparatus for running a wireline to a steering tool coupled with a downhole mud motor |
| 03/13/1996 | EP0701045A2 Multilateral well drilling and completion method and apparatus |
| 03/13/1996 | EP0701044A2 Apparatus and method for hanging a downhole liner |
| 03/13/1996 | EP0701043A2 Torque-resistant well packer |
| 03/13/1996 | EP0701042A2 Decentring method and apparatus, especially for multilateral wells |
| 03/13/1996 | EP0701041A2 Well flow conductor and manufacture thereof |
| 03/13/1996 | EP0701040A2 Downhole diverter and retrieving tool therefor |
| 03/12/1996 | US5497840 Process for completing a well |
| 03/06/1996 | EP0699819A2 Method and apparatus for well testing or servicing |
| 03/06/1996 | EP0699818A2 Downhole tool hanger |
| 03/06/1996 | EP0553309B1 Drilling pipe |
| 03/05/1996 | US5495755 Slick line system with real-time surface display |
| 03/01/1996 | CA2154935A1 Through tubing gun hanger |
| 02/27/1996 | US5495237 Measuring tool for collecting down hole information and metering valve for producing mud-pulse used in the same |
| 02/27/1996 | US5494111 Permanent whipstock |
| 02/27/1996 | CA2156983A1 Centralizing liner hanger method and system for subterranean multilateral well drilling |
| 02/27/1996 | CA2156981A1 Composite well flow conductor for subterranean multilateral well drilling and completion and method of manufacture therefor |
| 02/20/1996 | US5492173 Plug or lock for use in oil field tubular members and an operating system therefor |
| 02/14/1996 | CN2219957Y Hanging device for whipstock |
| 02/08/1996 | WO1996003606A1 Connection coupling for a traction device for laying cables or the like |
| 02/07/1996 | EP0695850A2 Steerable drilling tool and system |
| 02/06/1996 | US5488992 Spoolable flexible sliding sleeve |
| 02/06/1996 | US5488989 For use in forming a window at a wall of a well casing in a borehole |
| 01/31/1996 | CN1115993A System for in situ replacement of cutting means for a ground drill |
| 01/30/1996 | US5487427 For activating a slip for downhole use |
| 01/18/1996 | WO1996001408A1 Seismic anchor |
| 01/17/1996 | EP0692609A2 Release mechanism without presetting means for down-hole tools |
| 01/17/1996 | CN1115185A Assembly and process for drilling and completing multiple wells |
| 01/16/1996 | US5484029 Steerable drilling tool and system |
| 01/16/1996 | US5483988 Spoolable coiled tubing mandrel and gas lift valves |
| 01/16/1996 | US5483987 Remote control method and device for actuating an equipment-application to a drill string |
| 01/11/1996 | WO1996000834A1 Drag block for increasing the fluid resistance in a well production tubing |
| 01/09/1996 | US5482119 Multi-mode well tool with hydraulic bypass assembly |
| 01/03/1996 | EP0690201A2 Forming casing window off whipstock set in cement plug |
| 01/02/1996 | US5479986 Temporary plug system |
| 12/28/1995 | CA2152638A1 Forming casing window off whipstock set in cement plug |
| 12/27/1995 | CN1030582C Water oil pumping device for sealed well |
| 12/20/1995 | EP0687801A2 Metal sealing wireline plug |
| 12/20/1995 | EP0516806B1 Device for remotely operating an assembly comprising a bean/needle system, and use thereof in a drill string |
| 12/19/1995 | CA2002164C Running tool for liner hanger |
| 12/14/1995 | WO1995033913A1 Method for setting a whipstock in a wellbore |
| 12/14/1995 | WO1995033912A1 Hydraulic disconnection device |
| 12/13/1995 | EP0686753A2 A release device |
| 12/12/1995 | US5475187 For use in a borehole to provide seismic signals when energized remotely |
| 12/12/1995 | US5474133 Method for retreiving a slotted face wellbore deviation assembly using a retrieval tool |
| 12/12/1995 | US5474127 Annular safety system for oil well |
| 12/12/1995 | US5474125 Retrieval tool for use with a slotted face wellbore deviation assembly |
| 12/12/1995 | US5474124 Wellhead retrieval tool assembly |
| 12/06/1995 | EP0685628A1 Whipstock orientation method and system |
| 12/05/1995 | US5472057 Drilling with casing and retrievable bit-motor assembly |
| 12/05/1995 | US5472055 Liner hanger setting tool |
| 12/03/1995 | CA2150786A1 Whipstock orientation method and system |
| 11/23/1995 | WO1995031630A1 Whipstock and method for setting such a whipstock |
| 11/22/1995 | CN2213231Y Well logging instrument delivery tool for big slope well |
| 11/21/1995 | US5467821 Rectilinear tool for use with a slotted face wellbore deviation assembly |
| 11/21/1995 | US5467820 Slotted face wellbore deviation assembly |
| 11/21/1995 | US5467819 Orientable retrievable whipstock and method of use |
| 11/21/1995 | CA2077990C Mandrel operated tension torque anchor catcher |