Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 34 - Valve arrangements for boreholes or wells
Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685)
09/1982
09/14/1982US4349071 Cement retainer and setting tool assembly
09/14/1982US4349043 Method and apparatus for prevention of over-pressurization of a pressure responsive device
09/14/1982US4349041 Control valve system for blowout preventers
09/14/1982CA1131559A1 Valve
09/07/1982US4348058 Method and apparatus for slurry borehole mining
09/07/1982US4347900 Hydraulic connector apparatus and method
08/1982
08/31/1982CA1130722A1 Well safty valve system
08/24/1982US4345653 Packer deflate subassembly for an inflatable packer system
08/24/1982US4345648 Inflatable packer system
08/24/1982CA1130202A1 Safety valve
08/24/1982CA1130198A1 Landing nipple
08/24/1982CA1130197A1 Cementing tool with protective sleeve
08/17/1982US4344602 Lock open mechanism for subsurface safety valve
08/17/1982US4344491 Apparatus for actuating downhole flow control valves
08/10/1982US4343357 Downhole surge tools
08/10/1982CA1129339A1 Safety valve operating apparatus
08/10/1982CA1129338A1 Well safety system
08/03/1982US4342363 Geothermal well head
08/03/1982CA1128853A1 Wellhead flow control devices
07/1982
07/27/1982US4341266 Pressure operated test tool
07/27/1982CA1128414A1 Well for the solution mining of salt from an underground salt formation and a method for operating said well
07/20/1982US4340088 Pressure balanced safety valve for wells and flow lines
07/14/1982EP0055960A2 Full-bore well tester with hydrostatic bias
07/13/1982US4339108 Actuator for remotely operating a moving mechanism
07/13/1982US4339002 Sea buoy discharge manifold system
07/13/1982US4339001 Safety valve
07/13/1982CA1127419A1 Methods and apparatus for sensing wellhead pressure
07/06/1982US4337788 High pressure valve
07/06/1982US4337653 Blowout preventer control and recorder system
06/1982
06/30/1982EP0055183A1 Pressure responsive valve seat apparatus
06/16/1982EP0053983A1 Composite ball valve seal assembly
06/15/1982US4334581 Balanced area safety valve
06/08/1982US4333530 Method and apparatus for cementing a casing
06/08/1982US4333526 Annulus valve
06/01/1982US4332298 Valve assembly for an inflatable packer system
06/01/1982US4332267 Ball valve assembly
05/1982
05/27/1982WO1982001736A1 Device for temporarily sealing a pipe
05/25/1982US4331315 Actuatable safety valve for wells and flowlines
05/25/1982US4331207 Device for reversing the direction of flow of a fluid at the level of a drill bit
05/25/1982CA1124173A1 Port apparatus for well piping
05/18/1982US4330039 Pressure actuated vent assembly for slanted wellbores
05/11/1982US4328866 Check valve assembly
04/1982
04/20/1982US4325579 Well for the solution mining of salt from an underground salt formation and a method for operating said well
04/20/1982US4325434 Tubing shut off valve
04/20/1982US4325431 Flow controlling apparatus
04/20/1982US4325409 Pilot valve for subsea test valve system for deep water
04/13/1982US4324293 Circulation valve
04/06/1982US4323221 Power actuated valve
04/06/1982US4322969 Gas pressure relieving hydrostatic tester
03/1982
03/30/1982US4321946 Armature position monitoring and control device
03/23/1982US4320804 Subsea test tree
03/23/1982US4320803 Valve retrieval mechanism for an inflatable packer system
03/23/1982CA1120373A1 Safety valve or blowout preventer for use in a fluid transmission conduit
03/16/1982US4319639 Well safety system method
03/16/1982US4319634 Drill pipe tester valve
03/16/1982US4319633 Drill pipe tester and safety valve
03/16/1982CA1120028A1 Fluid circulation reversing devise at a well boring tool
03/02/1982US4317557 Emergency blowout preventer (BOP) closing system
02/1982
02/23/1982US4316596 Power actuated valve
02/23/1982US4316504 Check/relief valve for an inflatable packer system
02/23/1982US4316386 Fluid pressure measuring apparatus for incorporation into a pipeline rising from a well
02/16/1982US4315542 Mechanical tubing drain
02/16/1982CA1118342A1 Method and apparatus for hydraulically controlling subsea equipment
02/04/1982WO1982000315A1 Valve device
02/02/1982US4313497 Pressure control valve
01/1982
01/26/1982US4312406 Device and method for shifting a port collar sleeve
01/19/1982US4311297 Pressure insensitive valve
01/19/1982US4311197 Annulus pressure operated closure valve with improved reverse circulation valve
01/12/1982US4310058 Well drilling method
01/12/1982US4310051 Well safety valve apparatus
01/12/1982US4310050 Well drilling apparatus
01/12/1982US4310048 Well safety system method and apparatus
01/05/1982US4308918 Blowout preventer
01/05/1982US4308916 Pitless connection incorporating pressure relief valve
12/1981
12/30/1981EP0042390A1 Kelly valving apparatus
12/29/1981CA1115008A1 Slug and wipe tool
12/22/1981US4306623 Valve assembly for a subterranean well conduit
12/22/1981US4306586 Three way valve
12/15/1981CA1114265A1 Adjustable relief valve
12/08/1981US4304261 Valve
11/1981
11/17/1981US4300636 Constant bottom contact tool
11/17/1981CA1112558A1 Measuring casing coupler apparatus
11/17/1981CA1112557A1 Sampler and measurement apparatus
11/10/1981US4299287 Bar actuated vent assembly and perforating gun
11/10/1981US4299278 Control system for well heating by steam
11/03/1981US4298078 Method of inhibiting sticking of well string
10/1981
10/27/1981US4296807 Crossover tool
10/21/1981EP0038034A2 Safety valve manifold system
10/20/1981US4295795 Method for forming remotely actuated gas lift systems and balanced valve systems made thereby
10/20/1981US4295529 Blow-out preventor
10/20/1981US4295523 Well safety system method and apparatus
10/20/1981US4295361 Drill pipe tester with automatic fill-up
10/13/1981US4294315 Landing nipple
10/13/1981US4294284 Fail-safe, non-pressure locking gate valve
10/13/1981CA1110539A1 Valve
10/06/1981US4293163 Valve for closing the fluid passage of a well bore tubular member with balanced operating arrangement
10/06/1981US4293038 Ball valve assembly
10/06/1981US4293034 Well safety system method and apparatus
10/06/1981US4292988 Soft shock pressure plug
09/1981
09/29/1981US4291723 Fluid pressure actuated by-pass and relief valve
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