| Patents for E21B 23 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells (12,712) |
|---|
| 03/18/1980 | CA1073807A1 Method and apparatus for maintaining electric cable inside drill pipe |
| 03/18/1980 | CA1073744A1 Piston type seal unit |
| 03/11/1980 | US4192380 Method and apparatus for logging inclined earth boreholes |
| 03/11/1980 | US4192378 Port valve isolation packer |
| 02/26/1980 | US4190107 Well bore apparatus with hydraulically releasable tubing seal unit |
| 02/19/1980 | US4189001 Friction spring and slip retainer for a mechanical setting tubing anchor |
| 02/12/1980 | US4187906 Well bore apparatus with annulus pressure releasable tubing seal unit |
| 02/12/1980 | CA1071530A1 Method and apparatus for running and retrieving logging instruments in highly deviated well bores |
| 02/12/1980 | CA1071529A1 Method and apparatus for running and retrieving logging instruments in highly deviated well bores |
| 02/05/1980 | CA1071093A1 Methods and apparatus for determining the stuck point of a conduit in a borehole |
| 01/29/1980 | US4185689 Casing bridge plug with push-out pressure equalizer valve |
| 01/22/1980 | US4184546 Anchoring apparatus for tools used in determining the stuck point of a conduit in a borehole |
| 01/08/1980 | CA1069432A1 Multiple arm pad instrument for logging highly deviated boreholes |
| 01/08/1980 | CA1069431A1 System for logging highly deviated earth boreholes utilizing auxiliary sinker bar assembly |
| 01/01/1980 | US4181344 Running tool |
| 01/01/1980 | US4181331 Hanger apparatus for suspending pipes |
| 01/01/1980 | US4181184 Soft-wire conductor wellbore telemetry system and method |
| 01/01/1980 | CA1068899A Methods and apparatus for determining the stuck point of a conduit in a borehole |
| 12/25/1979 | US4180132 Service seal unit for well packer |
| 12/25/1979 | US4180131 Chemical cutting apparatus for use in wells |
| 12/18/1979 | US4178992 Metal seal tubing plug |
| 12/13/1979 | WO1979001087A1 Fluid pressure set and released well packer apparatus |
| 12/11/1979 | US4178579 Remote instrumentation apparatus |
| 12/04/1979 | US4176715 High temperature well packer |
| 12/04/1979 | CA1067399A1 Well flow control system and method |
| 11/27/1979 | US4175778 Releasing tool |
| 10/23/1979 | US4171934 Cable-suspended, liner-supported submergible pump installation with locking discharge head |
| 10/16/1979 | US4171031 Well logging instrument guide apparatus |
| 10/16/1979 | US4171018 Tubing hanger assembly and method of landing and locking |
| 10/02/1979 | US4169505 Kick-over apparatus |
| 09/25/1979 | US4168747 Method and apparatus using flexible hose in logging highly deviated or very hot earth boreholes |
| 09/18/1979 | US4167971 Hanger apparatus for suspending pipes |
| 09/18/1979 | US4167970 Hanger apparatus for suspending pipes |
| 09/11/1979 | CA1062155A1 Knock-out tool |
| 09/11/1979 | CA1062154A1 Centering devices for cleaning tools and the like |
| 09/11/1979 | CA1062152A1 Apparatus for cryothermal fracturing of rock formations |
| 09/11/1979 | CA1062147A1 Wireline latching apparatus and method of use |
| 09/04/1979 | US4166500 Well logging method and apparatus using friction-reducing agents |
| 09/04/1979 | CA1061714A1 Method for selectively retrieving a plurality of well packers |
| 08/21/1979 | US4164977 Well latch |
| 08/07/1979 | CA1059897A1 Mechanically set liner hanger and running tool |
| 07/24/1979 | US4161984 Well locking device and method |
| 07/17/1979 | US4161216 Mechanical latch with hydraulic locking mechanism |
| 07/10/1979 | US4160622 Portable water sampling apparatus |
| 07/03/1979 | CA1057653A1 Hydraulic operated casing hanger running tool |
| 07/03/1979 | CA1057652A1 Running tool for downhole apparatus |
| 06/19/1979 | US4158389 Chemical cutting apparatus and method for use in wells |
| 06/19/1979 | CA1056807A1 Wellbore telemetry system |
| 06/19/1979 | CA1056723A1 Well system |
| 06/05/1979 | CA1055842A1 Rotation release two-way well casing hanger |
| 05/29/1979 | US4156460 Retrievable double grip well packer |
| 05/22/1979 | CA1055010A1 Wireline sealing apparatus and method for use with a drill string |
| 05/15/1979 | US4154298 Well tubing hanger |
| 05/08/1979 | US4153109 Method and apparatus for anchoring whipstocks in well bores |
| 05/08/1979 | US4153108 Well tool |
| 05/01/1979 | US4151876 Single string retrievable well packers |
| 04/17/1979 | US4149593 Well testing tool system |
| 03/27/1979 | US4146091 Apparatus for installing and removing flow valves |
| 03/13/1979 | US4143721 Change in length of drill string containing an instrument |
| 03/13/1979 | CA1050422A1 Anchoring device for well tools |
| 03/06/1979 | CA1049928A1 Locking device for use in well tubing |
| 02/13/1979 | US4139836 Wellbore instrument hanger |
| 02/13/1979 | US4139059 Well casing hanger assembly |
| 02/13/1979 | US4139058 Hydraulic stop and orienting tool for well system installation |
| 01/23/1979 | US4135577 Tool centralizer guide having a J-groove release |
| 01/23/1979 | US4135576 Multiple pocket mandrel with fluid bypass |
| 01/23/1979 | CA1046933A1 Subsurface well apparatus having flexing means and method of using same |
| 01/23/1979 | CA1046932A1 Well flow control apparatus and method |
| 01/16/1979 | US4134452 Well testing tool |
| 01/09/1979 | US4133418 Through the flowline selector |
| 01/09/1979 | US4133378 Well tubing head |
| 01/09/1979 | US4133342 Method of replacing seals in a well ram type blow out preventer |
| 12/26/1978 | USRE29870 Apparatus for installing and removing flow valves |
| 12/26/1978 | US4131160 Well tool with pressure responsive tightening means |
| 12/19/1978 | US4130169 Downhole connector for use with drill string telemetering system |
| 12/19/1978 | US4130161 Underwater Christmas tree |
| 11/28/1978 | US4127168 Well packers using metal to metal seals |
| 11/21/1978 | US4126848 Drill string telemeter system |
| 11/21/1978 | US4126179 Locating system |
| 11/14/1978 | US4125162 Well flow system and method |
| 11/14/1978 | US4125161 Chemical cutting apparatus and method for use in wells |
| 11/14/1978 | US4125013 Anchoring apparatus for tools used in determining the stuck point of a conduit in a borehole |
| 10/31/1978 | US4122899 Well perforator with anchor and method |
| 10/31/1978 | US4122898 Tubing tester |
| 10/24/1978 | US4121675 Apparatus for gripping a shaft or the like |
| 10/24/1978 | US4121660 Well pressure test plug |
| 10/24/1978 | US4121659 Collar lock and seal assembly for well tools |
| 10/10/1978 | US4119147 Pumpdown safety valve |
| 09/26/1978 | US4116277 Full flow tubing plug with locked anchor and method |
| 09/26/1978 | US4116274 Wireline latching apparatus and method of use |
| 09/12/1978 | US4113236 Pulling tool apparatus |
| 09/12/1978 | US4113012 Reclosable circulation valve for use in oil well testing |
| 09/12/1978 | US4113010 Casing stop for well tools and an insertion device therefore |
| 08/29/1978 | US4109728 Apparatus and method for protecting well bore |
| 08/29/1978 | US4109716 Seal |
| 08/29/1978 | US4109521 Method and apparatus for logging inclined earth boreholes using the measured acceleration of the well logging instrument |
| 08/22/1978 | CA1036927A1 Method and apparatus for testing wells |
| 08/15/1978 | US4106565 Seal nipple packer |
| 08/15/1978 | US4106564 Sidepocket mandrel |
| 08/15/1978 | US4106563 Sidepocket mandrel |