| 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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| 08/14/1990 | CA1272682A1 Side pocket mandrel |
| 08/07/1990 | US4945987 Method and device for taking measurements and/or carrying out interventions in a sharply inclined well section and its application to production of seismic profiles |
| 08/01/1990 | EP0380263A2 Fishing jar |
| 08/01/1990 | EP0380148A1 Deployement/ retrieval method and apparatus for well tools used with coiled tubing |
| 07/31/1990 | US4944350 Tool for closing a well tubing |
| 07/31/1990 | US4944345 Well device lock mandrel and running tool |
| 07/31/1990 | CA1272121A1 Single zone gravel packing system |
| 07/24/1990 | US4942926 Device and method for carrying out operations and/or manipulations in a well |
| 07/24/1990 | US4942925 Liner isolation and well completion system |
| 07/24/1990 | US4942924 Liner setting assembly and method |
| 07/24/1990 | CA1271956A1 Rapid cycle annulus pressure responsive tester valve |
| 07/24/1990 | CA1271954A1 Tool for closing a well tubing |
| 07/17/1990 | US4941532 Anchor device |
| 07/17/1990 | US4941350 Method and apparatus for formation testing |
| 07/17/1990 | CA1271704A1 Wellhead drilling and completion apparatus |
| 07/12/1990 | WO1990007628A1 Wireline releasing device and method of releasing wireline |
| 07/10/1990 | US4940095 Deployment/retrieval method and apparatus for well tools used with coiled tubing |
| 07/10/1990 | US4940094 Method and device to actuate specialized intervention equipment in a drilled well having at least one section highly slanted with respect to a vertical line |
| 07/10/1990 | US4940089 Latching device |
| 07/10/1990 | CA1271409A1 Assembly for reducing the force applied to a slot and lug guide |
| 07/04/1990 | EP0376811A1 Remote actuator with a nozzle-needle system |
| 07/03/1990 | CA1271135A1 Retrievable well packer |
| 07/03/1990 | CA1271134A1 Retrieving mechanism |
| 06/27/1990 | EP0375100A1 Method and apparatus for logging deviated wells |
| 06/27/1990 | CA2006200A1 Wireline releasing device and method of releasing wireline |
| 06/26/1990 | US4936618 Grapple connection for coiled tubing |
| 06/19/1990 | US4934459 Subterranean well anchoring apparatus |
| 06/13/1990 | EP0372594A2 Tool for treating subterranean wells |
| 06/12/1990 | US4932471 Downhole tool, including shock absorber |
| 06/12/1990 | CA1270191A1 Line moving apparatus for wireline supported tools |
| 06/01/1990 | CA2003705A1 Dual firing system for a perforating gun |
| 05/30/1990 | EP0370652A2 Downhole well tool valve |
| 05/30/1990 | EP0370591A2 Downhole chemical cutting tool |
| 05/29/1990 | US4928771 Cable suspended pumping system |
| 05/29/1990 | US4928770 Mechanical manipulation tool with hydraulic hammer |
| 05/29/1990 | US4928768 Sump packer latching mechanism |
| 05/29/1990 | US4928767 Method and apparatus for setting and retrieving a deflection tool |
| 05/29/1990 | US4928762 For use in a well bore |
| 05/29/1990 | US4928761 Two-way plugs for wells |
| 05/29/1990 | CA1269615A1 Methods and apparatus for well completion operations |
| 05/29/1990 | CA1269613A1 Downhole corrosion coupon holder |
| 05/23/1990 | EP0369745A2 Directional drilling tool |
| 05/23/1990 | DE3908193A1 Appliance for fixing and sealing a Moineau pump (eccentric worm screw pump) in the riser of a liquid delivery probe |
| 05/22/1990 | US4926938 Rotatable liner hanger with multiple bearings and cones |
| 05/22/1990 | US4926937 Compound linkage-arm assembly for use in bore-hole tools |
| 05/22/1990 | US4926936 Multiple purpose liner hanger construction |
| 05/22/1990 | CA1269321A1 Borehole plug and method |
| 05/18/1990 | CA2002594A1 Directional drilling tool |
| 05/16/1990 | EP0368437A2 Downhole tester valve and probe |
| 05/09/1990 | EP0367505A2 Pressure monitoring apparatus and method |
| 05/08/1990 | US4923012 Safety valve for horizontal completions of subterranean wells |
| 05/01/1990 | US4921438 Wet connector |
| 05/01/1990 | US4921407 Production pump for high gravity or sand laden oil |
| 05/01/1990 | US4921045 Slip retention mechanism for subterranean well packer |
| 05/01/1990 | US4921044 Well injection systems |
| 04/25/1990 | CN1007744B Method and apparatus for automatically pouring mud during pulling out the drill |
| 04/24/1990 | US4919219 Remotely adjustable fishing jar |
| 04/12/1990 | DE3843969C1 Borehole plug for ground stabilisation in rock |
| 04/10/1990 | US4915178 Method of inserting a tool into a well under pressure |
| 04/10/1990 | US4915175 Well flow device |
| 04/10/1990 | US4915172 Method for completing a non-vertical portion of a subterranean well bore |
| 04/10/1990 | US4915171 Above packer perforate test and sample tool and method of use |
| 04/10/1990 | US4915168 Multiple well tool control systems in a multi-valve well testing system |
| 04/03/1990 | US4914432 Apparatus for locating a member in a borehole |
| 04/03/1990 | US4913239 Submersible well pump and well completion system |
| 04/03/1990 | US4913231 Tool for treating subterranean wells |
| 04/03/1990 | US4913229 Coupling for releasing tubing strings from downhole tools |
| 04/03/1990 | US4913227 Equipment for a drill pipe string including a side entry sub, a safety member for anchoring a cable on a support, and a method of using the equipment |
| 04/03/1990 | CA1267359A1 Temporary protection device and method for a servicing tool or measuring instrument at the head of a column |
| 03/28/1990 | EP0360652A1 Signal reception system that can be linked to the wall of a well or borehole |
| 03/27/1990 | US4911237 Running tool for liner hanger |
| 03/27/1990 | CA1267077A1 Side pocket mandrel |
| 03/27/1990 | CA1267076A1 Methods and apparatus for selectively controlling fluid communication between a pipe string and a well bore annulus |
| 03/20/1990 | US4909321 Wireline releasing device |
| 03/06/1990 | US4905759 Collapsible gun assembly |
| 02/27/1990 | US4903775 Well surging method and apparatus with mechanical actuating backup |
| 02/20/1990 | US4901804 Articulated downhole surveying instrument assembly |
| 02/20/1990 | US4901794 Subterranean well anchoring apparatus |
| 02/20/1990 | US4901793 No-turn tool for a pumping system |
| 02/07/1990 | EP0353275A1 Shut-in tool. |
| 02/06/1990 | US4898245 Retrievable well bore tubular member packer arrangement and method |
| 02/06/1990 | US4898241 Method and device for taking measurements and/or carrying out interventions in a well subjected to hydraulic compression |
| 02/06/1990 | US4898240 System for moving a set of instruments and a method for measurement and/or intervention in a well |
| 02/06/1990 | US4898239 Retrievable bridge plug |
| 02/06/1990 | US4898237 Probe and its multidirectional anchoring device in a well |
| 02/06/1990 | CA1265441A1 Lock for downhole apparatus |
| 01/30/1990 | US4896722 Multiple well tool control systems in a multi-valve well testing system having automatic control modes |
| 01/30/1990 | US4896721 Locator shifter tool |
| 01/25/1990 | WO1990000667A1 Plug for well logging operations |
| 01/24/1990 | EP0351884A1 Flow control device and packing sub |
| 01/23/1990 | US4895214 Directional drilling tool |
| 01/11/1990 | DE3823167A1 Underwater pump arrangement |
| 01/09/1990 | CA1264291A1 Latching production seal assembly |
| 01/03/1990 | EP0349335A2 Plug for a gravel packer |
| 12/26/1989 | US4889194 Method and a device for deep hole drilling |
| 12/20/1989 | CN1038141A Device for anchoring probe in well by spreading mobile anchorage arms |
| 12/14/1989 | DE3918132A1 Device for securing a tool inside a pipe sunk in the ground |
| 12/13/1989 | EP0346229A1 Mounting device for a tool especially suited for intervening at the end of a drill string |
| 12/13/1989 | EP0345830A2 Kickover tool apparatus |
| 12/12/1989 | US4886113 Positive indication shear ring |