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)
07/1983
07/19/1983USRE31313 Method and system for well testing
07/19/1983US4393930 Subterranean well pressure surging tool
07/19/1983US4393928 Apparatus for use in rejuvenating oil wells
07/12/1983US4392527 Water well developing system
07/12/1983US4392377 Early gas detection system for a drill stem test
07/12/1983CA1149734A1 Single line deep depth safety valve
07/05/1983US4391328 Drill string safety valve
07/05/1983US4391324 Geothermal well head and actuator assembly
06/1983
06/28/1983US4390171 Compression spring capsule
06/28/1983US4390065 Apparatus for well treating
06/28/1983CA1148856A1 Pressure differential circulating valve
06/21/1983US4388970 Apparatus and method for controlling injection fluid flow in a well annulus
06/14/1983US4387767 Subsurface safety valve system with hydraulic packer
06/08/1983EP0080527A1 Device for shifting a port collar sleeve
06/01/1983EP0080282A1 Pressure device
05/1983
05/31/1983CA1147256A1 Seal assembly
05/24/1983US4384615 Method of mixing fluids in a well bore
05/24/1983US4384612 Blowout preventer control apparatus
05/17/1983US4383578 Casing bore receptacle with fluid check valve
05/17/1983CA1146440A1 Velocity operated standing valve
05/11/1983EP0078261A1 Hydraulic control of subsea well equipment
05/03/1983US4381822 Landing nipple
05/03/1983CA1145663A1 Crossover tool
05/03/1983CA1145644A1 Fluid pressure actuated by-pass and relief valve
04/1983
04/28/1983WO1983001471A1 Separating collector for subsea blowouts
04/26/1983CA1145250A1 Check valve assembly
04/26/1983CA1145249A1 Safety valve
04/26/1983CA1145245A1 Method and apparatus for gravel packing multiple zones
04/12/1983CA1144475A1 Well test apparatus
04/05/1983US4378931 Valve and actuator therefor
04/05/1983US4378850 Hydraulic fluid supply apparatus and method for a downhole tool
04/05/1983US4378849 Blowout preventer with mechanically operated relief valve
04/05/1983US4378847 Valve
04/05/1983US4378842 Valve
04/05/1983US4378839 Well tool
04/05/1983CA1144065A1 Methods and apparatus for controlling fluid flow
03/1983
03/22/1983US4377206 Well blowout prevention device
03/22/1983US4377179 Pressure balanced ball valve device
03/22/1983CA1143279A1 Method and system for well testing
03/15/1983US4376464 Well safety valve
03/15/1983CA1142848A1 Inflatable packer system
03/01/1983US4375239 Acoustic subsea test tree and method
02/1983
02/22/1983CA1141659A1 Packer deflate subassembly for an inflatable packer system
02/22/1983CA1141657A1 Valve assembly for an inflatable packer system
02/22/1983CA1141656A1 Apparatus for and method of operating a well
02/22/1983CA1141655A1 Method and apparatus for selective disengagement of a fluid transmission conduit and for control of fluid transmission from a well zone
02/15/1983US4373587 Fluid displacement well safety valve
02/15/1983US4373583 Test-system
02/15/1983US4373582 Acoustically controlled electro-mechanical circulation sub
02/15/1983CA1141289A1 Subsea test tree
02/15/1983CA1141288A1 Valve assembly for a subterranean well conduit
02/08/1983US4372392 Full opening emergency relief and safety valve
02/08/1983US4372391 Screw operated emergency relief and safety valve
02/08/1983US4372388 Subsurface control valve
02/08/1983US4372333 Valve actuating apparatus and method
02/01/1983CA1140462A1 Actuator
01/1983
01/25/1983CA1140107A1 Kelly valve
01/18/1983US4368871 Lubricator valve apparatus
01/11/1983US4367889 Fire guarded blowout preventer hose
01/11/1983US4367794 Acoustically actuated downhole blowout preventer
01/11/1983CA1139189A1 Hydraulically operated actuator
01/05/1983EP0068985A2 Annulus pressure controlled reversing valve
01/04/1983CA1138771A1 Drill string safety and kill valve
12/1982
12/28/1982US4365671 Well system
12/23/1982WO1982004405A1 An oil/gas separator
12/21/1982US4364432 Seal assembly
12/21/1982US4364407 Mud saver valve
12/21/1982CA1137868A1 Oil well testing string bypass valve
12/15/1982EP0067096A2 Deflate-equalizing valve apparatus for inflatable packer formation tester
12/14/1982CA1137454A1 Fail-safe, non-pressure locking gate valve
12/07/1982US4362214 Tubing retrievable variable setting differential pressure actuated well safety valve
12/07/1982US4362211 Locking mandrel
12/01/1982EP0065601A1 Constant bottom contact tool
11/1982
11/30/1982US4361188 Well apparatus actuating means having pressure accumulator means and method of use
11/30/1982US4361187 Downhole mixing valve
11/23/1982US4360064 Circulating valve for wells
11/23/1982US4360063 Valve
11/23/1982CA1136037A1 Actuator
11/23/1982CA1136035A1 Well test systems and methods
11/16/1982US4359094 Shear relief valve
11/16/1982CA1135683A1 Pump in core breaker carrier
11/11/1982WO1982003887A1 Hydraulic control of subsea well equipment
11/03/1982EP0063596A1 Device for temporarily sealing a pipe.
11/02/1982US4356997 Flow control mechanism for high pressure wells
11/02/1982US4356867 Temporary lock-open tool for subterranean well valve
11/02/1982CA1134743A1 Valve retrieval mechanism for an inflatable packer system
11/02/1982CA1134741A1 Valve apparatus
11/02/1982CA1134740A1 Downhole mixing valve
10/1982
10/27/1982EP0063519A2 Pressure controlled reversing valve
10/26/1982US4355784 Method and apparatus for controlling back pressure
10/26/1982US4355686 Well system and method
10/26/1982US4355685 Ball operated J-slot
10/19/1982US4354554 Well safety valve
10/19/1982CA1133826A1 Valve
10/12/1982US4353419 Method for manufacturing a well production and sand screen assembly
10/12/1982CA1133385A1 Gravel pack tool
10/05/1982US4352376 Controller for well installations
10/05/1982US4352366 Velocity operated standing valve
10/05/1982CA1132881A1 Check/relief valve for an inflatable packer system
09/1982
09/21/1982US4350205 Work over methods and apparatus
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