| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
|---|
| 10/20/1981 | CA1110967A1 Well cementing/plug drilling apparatus and improved cementing and drilling process |
| 10/20/1981 | CA1110966A1 Pump down wipe plug and cementing/drilling process |
| 10/14/1981 | EP0037746A2 A rotary actuator |
| 10/13/1981 | USRE30767 Method using lignosulfonates for high-temperature plugging |
| 10/13/1981 | US4294288 Accumulator with float orienting means |
| 10/13/1981 | CA1110612A1 Method of caisson placement |
| 10/06/1981 | US4293146 VMP Casing tieback |
| 10/06/1981 | US4293115 Testing mechanism for blowout preventer ram lock |
| 10/06/1981 | US4293047 Drilling head |
| 09/29/1981 | US4291889 Seal for wellheads |
| 09/29/1981 | US4291768 Packing assembly for wellheads |
| 09/29/1981 | US4291767 Method for stabilizing and hanging surface casing |
| 09/29/1981 | CA1109784A1 Conduit sealing system |
| 09/29/1981 | CA1109783A1 Control system for subsea well-heads |
| 09/23/1981 | EP0036079A1 Man-hole frame constructed of assembled members |
| 09/23/1981 | EP0036019A1 Well treating fluid |
| 09/22/1981 | US4290578 Failsafe cutoff valve for oil and gas wells |
| 09/22/1981 | US4290577 Blowout preventer ram lock |
| 09/22/1981 | US4290483 Latch means for well tools and components |
| 09/22/1981 | US4290482 Plug container |
| 09/16/1981 | EP0035857A2 Annulus plugging |
| 09/15/1981 | US4289354 Borehole mining of solid mineral resources |
| 09/15/1981 | US4289294 Wellhead flow control devices |
| 09/15/1981 | US4289206 Remote multiple string well completion |
| 09/15/1981 | US4289201 Well test apparatus |
| 09/15/1981 | US4289200 Retrievable well apparatus |
| 09/15/1981 | US4289199 Wellhead sidewall electrical penetrator |
| 09/15/1981 | CA1108985A1 Well packer valve seal assembly |
| 09/15/1981 | CA1108984A1 Toggle mechanism connector |
| 09/08/1981 | US4288082 Well sealing system |
| 09/08/1981 | US4287952 Method of selective diversion in deviated wellbores using ball sealers |
| 09/08/1981 | CA1108526A1 Inflatable packer and method of constructing same |
| 09/03/1981 | WO1981002457A1 Packer arrangements for oil wells and the like |
| 09/03/1981 | WO1981002441A1 A low torque pack-off seal assembly with retrievable lower section |
| 09/01/1981 | US4286791 Packing assembly for a movable shaft |
| 09/01/1981 | US4286665 Apparatus and method for conducting offshore well operations |
| 09/01/1981 | US4286661 Equalizing valve for use in a well tool string |
| 09/01/1981 | US4286658 Isolation packer and methods of cementing from a floating vessel |
| 09/01/1981 | US4286629 Removable plug |
| 08/26/1981 | EP0034482A1 Guides for forming connections, and methods for forming connections |
| 08/25/1981 | US4285406 Drilling head |
| 08/25/1981 | US4285402 Method and apparatus for stimulating oil well production |
| 08/25/1981 | US4285400 Releasing tool for pressure activated packer |
| 08/25/1981 | CA1107827A1 Electrical connecteur for submarine use |
| 08/25/1981 | CA1107712A1 Method and apparatus for leveling templates for offshore subterranean wells |
| 08/25/1981 | CA1107638A1 Well collar or shoe and cementing/drilling process |
| 08/18/1981 | USRE30711 Well completion method and system |
| 08/18/1981 | US4284143 System for the remote control, the maintenance or the fluid injection for a submerged satellite well head |
| 08/18/1981 | US4284142 Method and apparatus for remote installation and servicing of underwater well apparatus |
| 08/18/1981 | US4284137 Anti-kick, anti-fall running tool and instrument hanger and tubing packoff tool |
| 08/11/1981 | US4283039 Annular blowout preventer with upper and lower spherical sealing surfaces |
| 08/11/1981 | CA1106756A1 Production wellheads for submarine oilwells |
| 08/05/1981 | EP0033281A1 Apparatus for the projection of a wall plastering, in particular for an excavation |
| 08/04/1981 | US4281840 High temperature packer element for well bores |
| 08/04/1981 | US4281724 Drilling head |
| 08/04/1981 | US4281722 Retractable bit system |
| 08/04/1981 | US4281716 Flexible workover riser system |
| 08/04/1981 | US4281711 Apparatus for positioning a liner on a tubular member in a well bore with a retrievable pack off bushing therebetween |
| 08/04/1981 | CA1106162A1 Process for reducing water influx into gas or oil producing wells |
| 07/28/1981 | USRE30690 Seal |
| 07/28/1981 | US4280719 Connector with rotatable locking ring, particularly for a riser used in offshore oil exploration and production |
| 07/28/1981 | US4280531 Method and apparatus for hydraulically controlling subsea well equipment |
| 07/21/1981 | US4279308 Surface casing stabilizer and hanger and method of employing the same |
| 07/21/1981 | US4279306 Well washing tool and method |
| 07/21/1981 | US4279300 Treating fluid applicator |
| 07/14/1981 | US4278278 Means for tensioning tubing in a wellhead assembly |
| 07/14/1981 | US4278277 Structure for compensating for different thermal expansions of inner and outer concentrically mounted pipes |
| 07/14/1981 | US4278105 Spherical accumulator with buoyant float |
| 07/14/1981 | US4277875 VMP Riser release tool |
| 07/07/1981 | US4276934 Method and device for blocking wells to extinguish fires, prohibit saltwater intrusion, etc. |
| 07/07/1981 | US4276778 Anaerobic sampling method |
| 07/07/1981 | CA1104493A1 Well packer bypass valve seal assembly |
| 07/07/1981 | CA1104492A1 No translation available |
| 06/30/1981 | US4275788 Method of plugging a well |
| 06/23/1981 | US4274664 Pipe joining device for underseas petroleum pipeline |
| 06/23/1981 | US4274489 Retrievable bridge plug and method of setting |
| 06/23/1981 | US4274486 Apparatus for and method of operating a well |
| 06/23/1981 | CA1103583A1 Containment of pressurized fluid jets |
| 06/16/1981 | US4273472 Apparatus for protecting subsea wells |
| 06/16/1981 | US4273372 Apparatus for use in lowering casing strings |
| 06/16/1981 | US4273190 Method and apparatus for gravel packing multiple zones |
| 06/16/1981 | CA1103308A1 Power source for subsea oil wells |
| 06/09/1981 | US4271903 Retrievable annulus and tubing flow control valves |
| 06/09/1981 | US4271867 Method and apparatus for hydraulically controlling subsea well equipment |
| 06/09/1981 | CA1102688A1 Surface casing stabilizer and hanger method of employing the same |
| 06/02/1981 | US4270761 Seal for geothermal wells and the like |
| 06/02/1981 | US4270608 Method and apparatus for gravel packing multiple zones |
| 06/02/1981 | CA1102235A1 Control line exiting coupling |
| 05/27/1981 | EP0029353A2 Apparatus for and method of testing and completing wells |
| 05/19/1981 | US4268283 Fluid control means for geothermal wells |
| 05/19/1981 | US4268043 Sealing member for use in well shafts |
| 05/19/1981 | US4268011 Stud tensioner for blowout preventer |
| 05/13/1981 | EP0028296A2 Arrangement for power-supply and measurement-data transmission from a central station to several measurement posts |
| 05/12/1981 | US4267062 Abandoned borehole compositions |
| 05/12/1981 | US4266605 Wireline safety check valve |
| 05/12/1981 | CA1100937A1 Subsea drilling template with carousel guidance system |
| 05/12/1981 | CA1100936A1 Well tubing handling apparatus |
| 05/12/1981 | CA1100865A1 Retrievable plug for offshore platforms having shear type retaining means |
| 05/05/1981 | US4265424 Blowout preventer and improved ram packer structure |
| 05/05/1981 | US4265313 Mooring station and transfer terminal for offshore hydrocarbon production |