| 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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| 04/08/1986 | US4580631 Support apparatus for use in a well |
| 04/08/1986 | CA1202887A1 Setting tool |
| 04/01/1986 | CA1202564A1 Hydraulic running and setting tool for well packers |
| 03/25/1986 | US4578785 Two-component acoustic borehole tool |
| 03/25/1986 | US4577685 Nipple protector sleeve for use in a well conduit |
| 03/18/1986 | US4576236 Perforation and isolation apparatus |
| 03/18/1986 | CA1201972A1 Controlling injection of fluids into wells |
| 03/11/1986 | US4575831 Method and apparatus for acquiring seismic signals in a borehole |
| 03/11/1986 | US4574883 Well tool stopping devices, systems and methods |
| 03/11/1986 | CA1201708A1 Full-bore drill stem testing apparatus with surface pressure readout |
| 03/04/1986 | US4573529 High flow injection anchor |
| 03/04/1986 | CA1201378A1 Vibration-isolating apparatus |
| 02/25/1986 | US4572299 For installing an electrical heater within a well |
| 02/25/1986 | US4572290 Mechanical setting tool |
| 02/25/1986 | US4572289 Electric wireline packer retriever apparatus |
| 02/25/1986 | CA1201061A1 Hang-off tool |
| 02/18/1986 | US4570715 Formation-tailored method and apparatus for uniformly heating long subterranean intervals at high temperature |
| 02/18/1986 | US4570709 Method and device for effecting, by means of specialized tools, such operations as measurements in highly inclined to the vertical or horizontal well portions |
| 02/18/1986 | US4570707 Releasable latch for downhole well tools |
| 02/13/1986 | WO1986000964A1 A securing device |
| 02/04/1986 | CA1200194A1 Side pocket mandrel with improved orienting means |
| 01/28/1986 | CA1200003A1 Method and apparatus for seismic signal acquisition in a borehole |
| 01/28/1986 | CA1199864A1 Method and apparatus for monitoring the corrosive effects of well fluids |
| 01/22/1986 | EP0168632A1 Removable functional module for a submarine oil production installation |
| 01/21/1986 | US4565247 Wireline set tubing retrievable seal bore packer apparatus |
| 01/07/1986 | US4563757 Method and apparatus for acquiring seismic signals in a borehole |
| 12/31/1985 | CA1198667A1 Method and apparatus for conducting wireline operations in a borehole |
| 12/24/1985 | US4560934 Method of transporting a payload in a borehole |
| 12/18/1985 | EP0165154A1 Method and device for effecting by means of specialized tools such operations as measurements in well sections highly inclined to the vertical, or the horizontals |
| 12/17/1985 | US4558751 Apparatus for transporting equipment through a conduit |
| 12/17/1985 | CA1198050A1 Drill hole plug |
| 12/10/1985 | US4557326 Well tool locking apparatus |
| 11/26/1985 | US4554975 Hold down apparatus for wireline operated gun |
| 11/26/1985 | US4554972 Well tool locking device |
| 11/19/1985 | US4553599 Control apparatus for oil well production string closing tool |
| 11/19/1985 | US4553310 Integrally formed sidepocket mandrel |
| 10/29/1985 | US4549630 Continuous shear wave logging apparatus |
| 10/16/1985 | EP0158465A2 Multi-mode testing tool |
| 10/09/1985 | EP0157662A1 Apparatus for the reception of acoustical waves in a borehole |
| 10/08/1985 | US4545434 Well tool |
| 10/08/1985 | US4545431 Wireline set/tubing retrieve packer type bridge plug |
| 10/08/1985 | CA1194781A1 Pump-down stinger assembly method and apparatus |
| 10/02/1985 | EP0156660A1 Apparatus for geophysical measurements in a bore hole |
| 10/01/1985 | CA1194409A1 Hanger mechanism |
| 09/25/1985 | EP0155462A1 Well probe |
| 09/24/1985 | US4542788 Downhole well tool |
| 09/18/1985 | EP0155128A2 Devices for actuating explosive charges in wellbores, and methods of perforating boreholes |
| 09/17/1985 | US4541482 Well installation |
| 09/17/1985 | CA1193541A1 Method and device using special tools for operations such as taking measures in portions of bore-wells sharply inclined or horizontal |
| 09/10/1985 | US4540048 Locking device for well tools |
| 09/10/1985 | US4540047 Flow controlling apparatus |
| 09/03/1985 | US4538681 Soft set and pull latch and setting tool for a well measuring instrument |
| 08/27/1985 | US4537258 Low pressure responsive downhole tool |
| 08/27/1985 | US4537251 Arrangement to prevent premature expansion of expandable seal means |
| 08/27/1985 | CA1192489A1 Kickover tool |
| 08/20/1985 | US4535842 To apply a force to a tool disposed at a sub-surface location in a well bore |
| 08/20/1985 | CA1192129A1 Liner and hydraulic liner hanger setting arrangement |
| 08/20/1985 | CA1192128A1 Well flow control apparatus |
| 08/13/1985 | US4534424 Retrievable telemetry system |
| 08/13/1985 | CA1191784A1 Universal liner hanger apparatus |
| 07/23/1985 | US4530398 For setting in a casing |
| 07/17/1985 | EP0148667A1 Process and device for geophysical measurements in a bore hole |
| 07/16/1985 | US4529035 Well completion |
| 07/09/1985 | US4527631 Subsurface safety valve |
| 07/09/1985 | CA1190144A1 Downhole lock system |
| 07/09/1985 | CA1190143A1 Kickover tool with pivot arm retraction means |
| 07/09/1985 | CA1190140A1 Sealing system for a well bore in which a hot fluid is circulated |
| 07/09/1985 | CA1190137A1 Recessed mounting device for instruments and its backfolding arms |
| 07/02/1985 | US4526233 Releasable coupling for tubing conveyed subterranean well perforating gun |
| 07/02/1985 | US4526229 For a well casing |
| 07/02/1985 | CA1189726A1 Apparatus and method for sensing downhole pressure |
| 06/26/1985 | EP0146423A1 Device for measuring the seismic profile in a borehole |
| 06/25/1985 | US4524833 Apparatus and methods for orienting devices in side pocket mandrels |
| 06/25/1985 | US4524831 for controlling fluid flow between inside and outside of the conduit |
| 06/25/1985 | US4524830 Landing nipple with subsurface safety valve |
| 06/18/1985 | US4524324 Downhole instrument including a flexible probe which can travel freely around bends in a borehole |
| 06/18/1985 | US4523644 Thermal oil recovery method |
| 06/18/1985 | US4523641 Liner hanger with channel guides |
| 06/18/1985 | CA1188981A1 Safety valve system with retrievable equalizing feature |
| 06/11/1985 | US4522259 Well apparatus |
| 06/05/1985 | EP0143192A2 Method and apparatus for conducting logging operations in a borehole |
| 06/04/1985 | CA1188364A1 Method of and apparatus for mining analysis |
| 05/28/1985 | US4519451 Well treating equipment and methods |
| 05/28/1985 | CA1187784A1 Dual ball valve sampler safety valve |
| 05/21/1985 | US4518037 Retrievable well tool |
| 05/21/1985 | CA1187407A1 Hydraulic setting tool with flapper valve |
| 05/21/1985 | CA1187405A1 Recloseable auxiliary valve |
| 05/14/1985 | USRE31881 Setting tools and liner hanger assembly |
| 05/14/1985 | US4516917 Well pumping apparatus and method |
| 05/14/1985 | US4516634 Hydraulic running and setting tool for well packer |
| 05/07/1985 | US4515220 Apparatus and method for rotating coil tubing in a well |
| 05/07/1985 | CA1186618A1 Pressure controlled reversing valve |
| 04/30/1985 | US4513822 Anchor seal assembly |
| 04/30/1985 | US4513817 Casing bore receptacle |
| 04/30/1985 | US4513816 Sealing system for a well bore in which a hot fluid is circulated |
| 04/30/1985 | US4513764 Valve |
| 04/23/1985 | US4512424 Tubular spring slip-joint and jar |
| 04/16/1985 | US4510995 Downhole locking apparatus |
| 04/16/1985 | US4510994 For use in a well tubing |
| 04/16/1985 | US4510797 Full-bore drill stem testing apparatus with surface pressure readout |