| 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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| 01/27/1987 | USRE32336 Method and apparatus for conducting logging or perforating operations in a borehole |
| 01/27/1987 | CA1217182A1 Surface controlled bent sub for directional drilling of petroleum wells |
| 01/21/1987 | EP0209338A2 Apparatus for hydraulically releasing a tool string from a gravel screen |
| 01/20/1987 | US4637471 Tubing drain valve useful with heavy, sand-bearing oil |
| 01/20/1987 | US4637469 Apparatus and method of well preparation for chemical treatment of produced fluids |
| 01/20/1987 | US4637460 Parallel flow tube apparatus |
| 01/20/1987 | CA1216924A1 Measuring device for a seismic profile within a well- bore |
| 01/13/1987 | US4635718 Continuous obstruction monitor for well logging tools |
| 01/07/1987 | EP0207702A2 Retrievable downhole bridge plug tool |
| 01/06/1987 | US4633952 Multi-mode testing tool and method of use |
| 12/30/1986 | US4632406 Apparatus in which an annular ring is carried within a groove about one member for slidably engaging the cylindrical surface of another member |
| 12/30/1986 | US4632193 In-hole motor with bit clutch and circulation sub |
| 12/30/1986 | EP0206917A1 Apparatus and method for the temporary protection of a workover or logging tool fastened to the end of a string |
| 12/24/1986 | CN85102931A Cartridge-container hanger using controlling pin |
| 12/17/1986 | EP0204823A1 Side pocket mandrel. |
| 12/17/1986 | EP0201397A1 Articulated-jet pump, especially used in the TFL technique to activate wells producing oil or water |
| 12/16/1986 | US4628998 For use in landing a well tool |
| 12/10/1986 | EP0046801B1 Packer arrangements for oil wells and the like |
| 12/09/1986 | CA1214990A1 Wire line running and/or pulling tool |
| 12/02/1986 | US4625799 Cleaning tool |
| 12/02/1986 | US4625798 Submersible pump installation, methods and safety system |
| 11/25/1986 | US4624311 Locking mechanism for hydraulic running tool for well hangers and the like |
| 11/25/1986 | US4624309 Apparatus for monitoring a parameter in a well |
| 11/25/1986 | US4624306 Downhole mobility and propulsion apparatus |
| 11/20/1986 | EP0201490A1 Downhole well pump and method |
| 11/12/1986 | CA1213969A Method and device for making geophysical measurements within a wellbore |
| 11/06/1986 | WO1986006436A1 Mechanical drive packer |
| 10/29/1986 | EP0198896A1 Device for connecting a boring line with a tube or similar item. |
| 10/28/1986 | US4619326 In a well completion process |
| 10/22/1986 | EP0198764A1 Method and apparatus for displacing logging tools in deviated wells |
| 10/14/1986 | US4616719 For overcoming a resistance to advance of a pipe string in a well bore |
| 10/14/1986 | US4616705 Mini-well temperature profiling process |
| 10/14/1986 | US4616703 Device for anchoring a probe in a well, by opening mobile arms |
| 10/14/1986 | CA1212623A1 Arrangement to prevent premature expansion of seal means |
| 10/08/1986 | CN85203350U Oil production pipe blockup tool |
| 10/07/1986 | CA1212316A1 Packer assembly valve |
| 10/01/1986 | CN86102218A Method and apparatus for displacing logging tools in deviated wells |
| 09/30/1986 | US4614233 Mechanically actuated downhole locking sub |
| 09/23/1986 | US4612987 For absorbing reaction torque from a downhole mud motor |
| 09/23/1986 | US4612984 Apparatus for the running and pulling of wire-line tools and the like in an oil or gas well |
| 09/23/1986 | CA1211705A1 Apparatus and methods for orienting devices in side pocket mandrels |
| 09/16/1986 | CA1211296A1 Method and apparatus for placement and retrieval of downhole gauges |
| 09/09/1986 | US4610309 Downhole tool |
| 09/09/1986 | CA1211038A1 Low pressure responsive downhole tool with cam actuated relief valve |
| 09/09/1986 | CA1211036A1 Low pressure responsive downhole tool |
| 08/27/1986 | EP0192558A1 Apparatus for positioning a tool or instrument in a flow line, particularly a down-hole autonomous hydraulic pump operating through the tubing in a well |
| 08/27/1986 | EP0192398A2 Liner setting device for wells |
| 08/27/1986 | EP0121566B1 Retrievable inside blowout preventer valve apparatus |
| 08/26/1986 | CA1210449A1 Downhole instrument and methods of manufacturing and using the same |
| 08/26/1986 | CA1210324A1 Method of producing side-pocket mandrels free of welds |
| 08/19/1986 | US4606410 Subsurface safety system |
| 08/12/1986 | US4605195 Annular blowout preventer packing unit |
| 08/12/1986 | US4605065 Method and apparatus for monitoring well tubing fluid |
| 08/12/1986 | US4605064 Well apparatus |
| 08/12/1986 | US4605063 Chemical injection tubing anchor-catcher |
| 08/12/1986 | CA1209464A1 Well pumping apparatus and method |
| 08/12/1986 | CA1209462A1 Method and apparatus for conducting wireline operations in a borehole |
| 08/05/1986 | US4603743 Hydraulic/mechanical setting tool and liner hanger |
| 08/05/1986 | US4603736 Method of producing side-pocket mandrels free of welds |
| 07/31/1986 | WO1986003544A3 Apparatus for placing and removing well flow control devices |
| 07/29/1986 | CA1208544A1 Liner hanger with channel guides |
| 07/22/1986 | US4601343 PBR with latching system for tubing |
| 07/16/1986 | EP0187599A1 Apparatus driven by hydraulic pressure for conducting logging and work-over operations in a deviated well during injection or production |
| 07/15/1986 | US4600059 Line moving apparatus for wireline supported tools |
| 07/15/1986 | US4600058 Equipment insert and method |
| 07/15/1986 | US4600055 Tubular well tool receiving conduit |
| 07/08/1986 | US4598774 Setting tool with retractable torque fingers |
| 07/02/1986 | EP0186317A1 Casing high angle wellbores |
| 07/01/1986 | US4597446 Safety valves for wells |
| 07/01/1986 | US4597440 Method and apparatus for displacing logging tools in deviated wells |
| 06/25/1986 | EP0185111A1 Downhole steering apparatus |
| 06/24/1986 | US4596294 Surface control bent sub for directional drilling of petroleum wells |
| 06/19/1986 | WO1986003544A2 Apparatus for placing and removing well flow control devices |
| 06/17/1986 | US4595055 Centering apparatus |
| 06/17/1986 | US4595054 Well lock having retractable no-go dogs |
| 06/17/1986 | US4595052 Reperforable bridge plug |
| 06/17/1986 | CA1206248A1 Method and apparatus for seismic signal acquisition in a borehole |
| 06/17/1986 | CA1206090A1 Side pocket mandrel |
| 06/10/1986 | US4593765 Tubing resettable well tool |
| 06/03/1986 | US4592427 Through tubing progressing cavity pump |
| 05/27/1986 | US4591197 Wire line running and/or pulling tool |
| 05/22/1986 | WO1986002971A1 Downhole well pump and method |
| 05/20/1986 | US4589482 Well production system |
| 05/13/1986 | US4588951 Arm apparatus for pad-type logging devices |
| 05/13/1986 | US4588030 Well tool having a metal seal and bi-directional lock |
| 05/13/1986 | CA1204383A1 Well tool |
| 05/10/1986 | CN85102547A Synchronizalion tube-pulling machine |
| 05/09/1986 | WO1986002695A1 Device for connecting a boring line with a tube or similar item |
| 04/29/1986 | US4585066 Well treating process for installing a cable bundle containing strands of changing diameter |
| 04/29/1986 | CA1203751A1 Mechanical wireline borehole packer |
| 04/23/1986 | EP0178784A2 Horizontally stabilized borehole sonde |
| 04/22/1986 | US4583593 Hydraulically activated liner setting device |
| 04/22/1986 | US4583592 Well test apparatus and methods |
| 04/22/1986 | US4583591 Downhole locking apparatus |
| 04/22/1986 | US4583590 Slip releasing apparatus |
| 04/15/1986 | US4582136 Method and apparatus for placement and retrieval of downhole gauges |
| 04/15/1986 | US4581927 Self-contained bore hole flow measurement system and method therefor |
| 04/15/1986 | CA1203161A1 Retrievable inside blowout preventer valve apparatus |
| 04/10/1986 | WO1986002124A1 Device for controlling the locking of a sampling tube |
| 04/08/1986 | US4580955 Eccentric screw pump for the conveying of liquids from bore holes |