| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 04/17/1979 | US4149593 Well testing tool system |
| 04/03/1979 | US4147211 Enhanced oil recovery process utilizing a plurality of wells |
| 04/03/1979 | CA1051774A1 Method for oil recovery improvement |
| 04/03/1979 | CA1051675A1 Submersible pipe installation systems |
| 03/27/1979 | US4146094 Tubular one-way closure for injecting a material into a hole |
| 03/27/1979 | US4146093 Layer-separating device hydraulically anchorable in a well casing |
| 03/27/1979 | US4146092 Well packer valve seal assembly |
| 03/27/1979 | CA1051340A1 Selectively plugging water zones |
| 03/20/1979 | US4144936 Down hole milling or grinding system |
| 03/13/1979 | US4143881 Lubricant cooled rotary drill head seal |
| 03/13/1979 | US4143880 Reverse pressure activated rotary drill head seal |
| 03/13/1979 | US4143715 Method for bringing a well under control |
| 03/13/1979 | CA1050422A1 Anchoring device for well tools |
| 03/13/1979 | CA1050421A2 Sub-sea well heads |
| 03/13/1979 | CA1050420A2 Capsules for enclosing sub-sea installation parts |
| 03/13/1979 | CA1050419A2 Method of replacing seals in ram type blow out preventers |
| 03/13/1979 | CA1050418A1 Oil well tool with packing means |
| 03/13/1979 | CA1050288A2 Sealing arrangements for use under water |
| 03/13/1979 | CA1050257A1 Asphalt plug emplacement process |
| 03/06/1979 | US4142584 Termination means for a plurality of riser pipes at a floating platform |
| 03/06/1979 | US4142583 Well tool pack-off with sinker bar release means |
| 02/27/1979 | US4141413 Hydraulic actuated weight set well packer |
| 02/20/1979 | CA1048927A1 Plug for injection |
| 02/13/1979 | US4139060 Selective wellbore isolation using buoyant ball sealers |
| 02/13/1979 | US4139059 Well casing hanger assembly |
| 02/13/1979 | US4139058 Hydraulic stop and orienting tool for well system installation |
| 02/13/1979 | CA1048405A1 Seismic drill hole surface plug |
| 02/06/1979 | US4138148 Split-ring riser latch |
| 02/06/1979 | US4138144 Wellhead sealing assembly |
| 02/06/1979 | US4137970 Packer with chemically activated sealing member and method of use thereof |
| 02/06/1979 | US4137946 Pressure vessel nut and lock screw arrangement |
| 01/23/1979 | US4135859 Pollution control device adapted for attachment to reservoir gland stuffing boxes |
| 01/16/1979 | US4134456 Sub-sea well heads |
| 01/16/1979 | US4134452 Well testing tool |
| 01/16/1979 | CA1046496A1 Rotary drilling head assembly |
| 01/09/1979 | US4133386 Drill pipe installed large diameter casing cementing apparatus and method therefor |
| 01/09/1979 | US4133383 Terminating the flow of fluids from uncontrolled wells |
| 01/09/1979 | US4133381 Contacting treated oil shale with carbon dioxide to inhibit leaching |
| 01/09/1979 | US4133378 Well tubing head |
| 01/09/1979 | US4133342 Method of replacing seals in a well ram type blow out preventer |
| 01/09/1979 | CA1045971A1 Packing means for a wellhead assembly |
| 01/02/1979 | US4132270 Method for protection of well equipment from particles of debris |
| 01/02/1979 | US4132268 Method for insuring oil well treatment on a regular basis as scheduled |
| 01/02/1979 | US4132267 Pipe shearing ram assembly for blowout preventer |
| 01/02/1979 | US4132266 Pipe shearing ram assembly for blowout preventer |
| 01/02/1979 | US4132265 Pipe shearing ram assembly for blowout preventer |
| 01/02/1979 | US4132243 Apparatus for feeding perforation sealer balls and the like into well treating fluid |
| 12/26/1978 | US4131287 Annular seal |
| 12/26/1978 | US4131160 Well tool with pressure responsive tightening means |
| 12/19/1978 | US4130165 Method for selectively plugging water zones |
| 12/19/1978 | US4130161 Underwater Christmas tree |
| 12/19/1978 | CA1044597A1 Stuffing box control system |
| 12/12/1978 | US4129308 Packer cup assembly |
| 12/12/1978 | US4129151 Cap for releasably covering well casings |
| 12/05/1978 | CA1043698A1 Connection between water tubes |
| 11/28/1978 | US4127168 Well packers using metal to metal seals |
| 11/28/1978 | US4127167 Lubricator for moving well equipment through flow conductor |
| 11/14/1978 | USRE29830 Cementing plug launching apparatus |
| 11/14/1978 | US4125267 Well packer including anti-extrusion washer |
| 11/14/1978 | US4125164 Apparatus and method for lifting a bop from a wellhead |
| 11/14/1978 | US4125162 Well flow system and method |
| 11/14/1978 | US4125159 Method and apparatus for isolating and treating subsurface stratas |
| 11/14/1978 | US4125155 Tubing hanger with fail-safe control passageway |
| 11/14/1978 | CA1042477A1 Device for establishing a connection between successive duct sections |
| 11/07/1978 | US4124547 Material for impression packer |
| 11/07/1978 | CA1041900A1 Lignosulfonates for high-temperature plugging |
| 11/07/1978 | CA1041897A1 Continuous orifice fill device |
| 10/24/1978 | US4121660 Well pressure test plug |
| 10/24/1978 | US4121659 Collar lock and seal assembly for well tools |
| 10/24/1978 | US4121658 Pitless well adapter |
| 10/24/1978 | CA1041008A1 Method and apparatus for running, operating and retrieving subsea well equipment |
| 10/17/1978 | US4120506 Wellhead seal |
| 10/17/1978 | US4120368 Supplying motive fluid to below ground tool drive from a pressurized bore hole |
| 10/17/1978 | US4120362 Subsea station |
| 10/17/1978 | US4120361 Injecting aqueous solution of partially hydrolyzed polyacrylamide and contacting with divalent and trivalent metal cations |
| 10/17/1978 | US4120171 Apparatus and method of connecting a flexible line to a subsea station |
| 10/17/1978 | CA1040528A1 Well completion in permafrost |
| 10/10/1978 | US4119297 Snubbing apparatus |
| 10/10/1978 | US4119145 Column structure enabling handling appliances on the seabed, particularly for the assembly and maintenance of well-heads |
| 10/10/1978 | CA1040093A1 Cementing basket |
| 10/03/1978 | US4117688 Apparatus for working under water |
| 09/26/1978 | US4117287 Combined electrical-hydraulic connector means |
| 09/26/1978 | US4116277 Full flow tubing plug with locked anchor and method |
| 09/26/1978 | US4116272 Subsea test tree for oil wells |
| 09/26/1978 | US4116044 Packoff leak detector |
| 09/26/1978 | US4116015 Method and apparatus for remotely attaching a riser pipe to an offshore structure |
| 09/19/1978 | CA1038749A2 Pressure operated isolation valve for use in a well testing and treating apparatus, and its method of operation |
| 09/19/1978 | CA1038748A2 Pressure operated isolation valve for use in a well testing and treating apparatus, and its method of operation |
| 09/19/1978 | CA1038634A1 Subsea structure |
| 09/12/1978 | US4113085 Sealing arrangements for use under water |
| 09/12/1978 | US4112687 Power source for subsea oil wells |
| 09/05/1978 | US4111388 Vertical pipe holding tool |
| 09/05/1978 | US4111334 Ball injector |
| 09/05/1978 | US4111261 Wellhead isolation tool |
| 08/29/1978 | US4109942 Seal |
| 08/29/1978 | US4109728 Apparatus and method for protecting well bore |
| 08/29/1978 | US4109716 Seal |
| 08/29/1978 | US4109713 Pumping well blow-out preventer |
| 08/29/1978 | US4109712 Safety apparatus for automatically sealing hydraulic lines within a sub-sea well casing |
| 08/22/1978 | US4108318 Apparatus for offshore handling and running of a BOP stack |