| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
|---|
| 08/22/1978 | US4108257 Apparatus for controlling a well during drilling operations |
| 08/22/1978 | CA1036930A2 Method of sealing off a well |
| 08/22/1978 | CA1036929A1 Blowout ram preventer |
| 08/15/1978 | US4106565 Seal nipple packer |
| 08/15/1978 | US4106562 Wellhead apparatus |
| 08/15/1978 | CA1036459A1 System for operating hydraulic apparatus |
| 08/08/1978 | US4105215 Well packer including combination anti-extrusion and segment ring actuating washer |
| 08/08/1978 | US4105074 Cementing staging tool |
| 08/08/1978 | US4105069 Gravel pack liner assembly and selective opening sleeve positioner assembly for use therewith |
| 08/01/1978 | US4103741 Oil well perforation testing device |
| 08/01/1978 | US4103498 Plugs for bores in rocks or the like |
| 07/25/1978 | US4102401 Well treatment fluid diversion with low density ball sealers |
| 07/25/1978 | US4102397 Sealing an underground coal deposit for in situ production |
| 07/18/1978 | US4100968 Technique for running casing |
| 07/11/1978 | US4099699 Annular blowout preventer |
| 07/11/1978 | US4099571 Down hold packing gland and method for long stroke pumper |
| 07/11/1978 | US4099563 Steam injection system for use in a well |
| 07/11/1978 | US4099562 Device for limiting leakage from well head stuffing box assembly |
| 07/04/1978 | US4098516 Blowout preventer packing unit with slanted reinforcing inserts |
| 07/04/1978 | US4098341 Rotating blowout preventer apparatus |
| 07/04/1978 | US4098335 Dual string tubing hanger and running and setting tool therefor |
| 07/04/1978 | US4098334 Dual string tubing hanger |
| 06/27/1978 | US4097069 Marine riser connector |
| 06/27/1978 | US4096913 Hydraulically set liner hanger and running tool with backup mechanical setting means |
| 06/27/1978 | US4096737 Underwater wellhead testing |
| 06/20/1978 | US4095805 Annular blowout preventer |
| 06/20/1978 | US4095437 Submersible pipe installation systems |
| 06/20/1978 | US4095421 Subsea energy power supply |
| 06/06/1978 | US4093310 Sealing an underground coal deposit for in situ production |
| 06/06/1978 | US4093028 Methods of use of cementitious materials and sonic or energy-carrying waves within subsurface formations |
| 05/30/1978 | US4091868 Method of treating oil wells |
| 05/30/1978 | US4091867 Flexible conduit injection system |
| 05/30/1978 | CA1032154A1 Exploration boring method and use thereof |
| 05/23/1978 | US4090573 Wireline sealing apparatus and method for use with a drill string |
| 05/23/1978 | US4090565 Control line tubing hanger |
| 05/23/1978 | US4090560 Junction housing for use in undersea oil wells |
| 05/23/1978 | US4090366 Transit capsules |
| 05/16/1978 | US4089532 Blowout preventer ram assembly |
| 05/16/1978 | US4089377 Seal adaptor alignment means and landing tool and method |
| 05/16/1978 | CA1031153A1 Well grouting processes |
| 05/09/1978 | US4088152 Low friction electro-hydraulic pilot valve |
| 05/02/1978 | US4087211 Driving unit for vertical pump |
| 05/02/1978 | US4087119 Fluid pressure operated duct coupling |
| 04/25/1978 | US4085800 Plugging earth strata |
| 04/18/1978 | US4084648 Process for the high-pressure grouting within the earth and apparatus adapted for carrying out same |
| 04/11/1978 | US4083408 Well completion apparatus |
| 04/11/1978 | US4083406 Method and apparatus for sealing drill casing |
| 04/11/1978 | US4083405 Well drilling method and apparatus therefor |
| 04/04/1978 | US4082298 Inflatable packer and valve mechanism therefor |
| 03/28/1978 | US4081032 Steam deflector for use in a well |
| 03/28/1978 | US4081027 Shear rams for hydrogen sulfide service |
| 03/21/1978 | US4080025 Automatic connector for underwater connection |
| 03/21/1978 | US4079998 Lixiviant recirculator for in situ mining |
| 03/14/1978 | US4078609 Method of fracturing a subterranean formation |
| 03/14/1978 | US4078606 Pressure actuated holding apparatus |
| 03/07/1978 | US4077472 Well flow control system and method |
| 02/28/1978 | US4076208 Blowout preventer ram lock |
| 02/28/1978 | US4076083 Method and apparatus for controlling a well during drilling operations |
| 02/28/1978 | US4076079 Full bore fracture treating assembly |
| 02/21/1978 | US4074912 Releasable rigid pile connector apparatus |
| 02/21/1978 | US4074757 Method using lignosulfonates for high-temperature plugging |
| 02/14/1978 | US4073511 Coupling assembly for submarine casing sections |
| 01/31/1978 | US4071085 Well head sealing system |
| 01/31/1978 | US4071084 Well packer |
| 01/24/1978 | US4069866 Pressure apportioning valve apparatus for use with multiple packers |
| 01/17/1978 | US4068865 Pipe connectors |
| 01/10/1978 | US4067388 Hydraulic operated casing hanger running tool |
| 01/10/1978 | US4067385 Apparatus and method for connecting a tubing string to downhole well equipment |
| 01/10/1978 | US4067358 Indexing automatic fill-up float valve |
| 01/10/1978 | US4067062 Hydraulic set tubing hanger |
| 01/03/1978 | US4066125 Seismic drill hole surface plug |
| 12/27/1977 | US4064941 Apparatus and method for mixing separated fluids downhole |
| 12/27/1977 | US4064936 Chemical treating system for oil wells |
| 12/13/1977 | US4062402 Method and apparatus for connecting a riser pipe to blow out preventer stack at the head of an oil well |
| 11/29/1977 | US4060249 Rod packing |
| 11/29/1977 | US4060131 Mechanically set liner hanger and running tool |
| 11/22/1977 | US4059150 Anchoring assembly |
| 11/22/1977 | US4059149 Self-operating chemical feeder for an oil well |
| 11/15/1977 | US4058166 Well setting tool |
| 11/08/1977 | US4057267 Fluid controlled pipe connectors |
| 11/08/1977 | US4057118 Bit packer for dual tube drilling |
| 11/01/1977 | US4056272 Seal |
| 11/01/1977 | US4056145 Hydraulic holddown for well packer stinger |
| 11/01/1977 | US4056144 Positive seal pitless well adapter |
| 11/01/1977 | US4055958 Slipforming method and apparatus for in situ lining of an upwardly open shaft with monolithic concrete |
| 10/25/1977 | US4055224 Method for forming an underground cavity |
| 10/11/1977 | US4053023 Underwater well completion method and apparatus |
| 10/11/1977 | US4052995 Blowout preventer ram lock and locking method |
| 10/04/1977 | US4052703 Intelligent multiplex system for subsurface wells |
| 10/04/1977 | US4051897 Well testing tool |
| 10/04/1977 | US4051896 Well bore liner hanger |
| 09/27/1977 | US4050517 Geothermal energy well casing seal and method of installation |
| 09/27/1977 | US4050512 Stroke actuated well testing tool |
| 09/20/1977 | US4049055 Gravel pack method, retrievable well packer and gravel pack apparatus |
| 09/13/1977 | US4047566 Well cementing method and apparatus |
| 09/13/1977 | US4047391 Grout seal |
| 09/06/1977 | US4046192 Method and apparatus for installing a control valve assembly on an underwater well head |
| 09/06/1977 | US4046191 Subsea hydraulic choke |
| 08/30/1977 | US4044988 Blowout ram preventer |
| 08/30/1977 | US4044832 Concentric gravel pack with crossover tool and method of gravel packing |