| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 05/02/2013 | WO2013019721A3 Recovery valve |
| 05/02/2013 | US20130105176 Method of controlling pressure in a well |
| 05/02/2013 | US20130105175 Frangible pressure control plug, actuatable tool including the plug, and method thereof |
| 05/02/2013 | US20130105149 Safety valve with electrical actuator and tubing pressure balancing |
| 05/02/2013 | CA2852907A1 Gradational insertion of an artificial lift system into a live wellbore |
| 05/02/2013 | CA2852157A1 Inflow control device |
| 05/01/2013 | EP2586964A1 Inflow control device |
| 05/01/2013 | EP2585674A2 Valve assembly |
| 05/01/2013 | CN202914060U Thickened oil thermal production well underground steam seal and control device |
| 05/01/2013 | CN202914037U Ball seat used for gas well staged fracturing ball sliding sleeve |
| 05/01/2013 | CN202914036U Hermetic seal subsurface safety valve of side hole control valve |
| 05/01/2013 | CN202914035U Adaptive equalization control valve of horizontal well |
| 05/01/2013 | CN202914034U Self-expanding ball seat |
| 05/01/2013 | CN202914033U Mechanical downhole casing valve |
| 05/01/2013 | CN202914032U Switch tool suitable for mechanical casing valve under shaft |
| 05/01/2013 | CN202914031U Coiled tubing double-disc check valve |
| 05/01/2013 | CN202914030U Puncture-resistant adjustable oil nozzle |
| 05/01/2013 | CN202914024U 浮箍 Float collar |
| 05/01/2013 | CN202914018U Pressure test anti-spraying multifunctional plug |
| 05/01/2013 | CN103080467A Variable flow restrictor for use in a subterranean well |
| 05/01/2013 | CN103080465A Method and apparatus for a well employing the use of an activation ball |
| 05/01/2013 | CN103075516A Segmented seal ring and support of same |
| 05/01/2013 | CN103075134A Automatic matching injection tubular column for injecting air and steam |
| 04/30/2013 | US8430173 High strength dissolvable structures for use in a subterranean well |
| 04/30/2013 | CA2711329C Bottom hole assembly with ported completion and methods of fracturing therewith |
| 04/25/2013 | WO2013059251A1 Venting system and method to reduce adiabatic heating of pressure control equipment |
| 04/25/2013 | WO2013058982A2 Method and apparatus for removing shifting tools and providing wellbore isolation |
| 04/25/2013 | WO2013058972A1 Control systems and methods for subsea activities |
| 04/25/2013 | WO2013058756A1 Protection of a safety valve in a subterranean well |
| 04/25/2013 | WO2012173972A3 Managing treatment of subterranean zones |
| 04/25/2013 | WO2012040220A3 Signal operated isolation valve |
| 04/25/2013 | US20130098635 Receptacle sub |
| 04/25/2013 | US20130098632 Gradational insertion of an artificial lift system into a live wellbore |
| 04/25/2013 | US20130098631 Protection of a safety valve in a subterranean well |
| 04/25/2013 | US20130098630 Downhole flow control device and method |
| 04/25/2013 | US20130098629 Method and apparatus for removing liquid from a horizontal well |
| 04/25/2013 | US20130098624 Valve actuating apparatus |
| 04/25/2013 | US20130098620 Flow rate control valve for solutions of polymers |
| 04/25/2013 | US20130098616 Flow isolation sub for tubing operated differential pressure firing head |
| 04/25/2013 | US20130098604 Detection and quantification of isolation defects in cement |
| 04/24/2013 | CN202900225U A tubular column for a stage-unlimited intelligent well cementation sliding sleeve separate layer fracturing reconstruction technology |
| 04/24/2013 | CN202900164U Sliding pneumatic driver |
| 04/24/2013 | CN202900163U A stage-unlimited intelligent well cementation sliding sleeve switching valve |
| 04/24/2013 | CN202900162U Valve core of sleeve valve |
| 04/24/2013 | CN202900161U High-pressure energy-saving oil draining device |
| 04/24/2013 | CN202900160U An immovable string steam injection valve for a vane pump oil extraction system |
| 04/24/2013 | CN202900159U Oil pipe underground constant pressure valve |
| 04/24/2013 | CN202900158U Diaphragm-type air pressure driver |
| 04/24/2013 | CN202900157U Oil field sampling cipher antitheft apparatus |
| 04/24/2013 | CN202900156U Flow blocker |
| 04/24/2013 | CN202900121U Double-acting hydraulic driver |
| 04/24/2013 | CN103061733A Sleeve valve type fracturing production-increasing tool |
| 04/24/2013 | CN103061723A Device capable of adjusting flow in modularized mode |
| 04/24/2013 | CN103061709A Sliding bush control tool and hydraulic-control sliding bush capable of achieving surpassing operation |
| 04/24/2013 | CN103061708A Down-hole worm wheel diverting device |
| 04/24/2013 | CN103061707A Cycling switch valve under well |
| 04/24/2013 | CN103061683A Dual-purpose tool as drill stem and well completion sieve tube |
| 04/24/2013 | CN101275465B Monitoring and automatic control of operating parameters for a downhole oil/water separation system |
| 04/23/2013 | US8424611 Downhole safety valve having flapper and protected opening procedure |
| 04/23/2013 | CA2755402C Downhole data communication |
| 04/23/2013 | CA2698948C Multi-function indicating tool |
| 04/18/2013 | WO2013055330A1 Independent dual actuated subsurface safety valve |
| 04/18/2013 | WO2013053057A1 Wellbore actuators, treatment strings and methods |
| 04/18/2013 | WO2013053055A1 Downhole actuation ball, methods and apparatus |
| 04/18/2013 | WO2013025368A3 Tubing pressure insensitive pressure compensated actuator for a downhole tool and method |
| 04/18/2013 | WO2012052759A3 Fluid injection device |
| 04/18/2013 | US20130092396 Independent Dual Actuated Subsurface Safety Valve |
| 04/18/2013 | US20130092395 Venting System and Method to Reduce Adiabatic Heating of Pressure Control Equipment |
| 04/18/2013 | US20130092393 Method and apparatus for controlling fluid flow using movable flow diverter assembly |
| 04/18/2013 | US20130092392 Method and apparatus for controlling fluid flow using movable flow diverter assembly |
| 04/18/2013 | US20130092384 Subsea tree safety control system |
| 04/18/2013 | US20130092382 Method and apparatus for controlling fluid flow using movable flow diverter assembly |
| 04/18/2013 | US20130092381 Method and apparatus for controlling fluid flow using movable flow diverter assembly |
| 04/18/2013 | US20130092380 Downhole contingency apparatus |
| 04/18/2013 | CA2852779A1 Downhole actuation ball, methods and apparatus |
| 04/18/2013 | CA2851710A1 Wellbore actuators, treatment strings and methods |
| 04/17/2013 | EP2581550A2 Downhole valve assembly |
| 04/17/2013 | EP2581549A2 Valve actuating apparatus |
| 04/17/2013 | EP2581548A2 Valve actuating apparatus |
| 04/17/2013 | EP2581547A2 Downhole contingency apparatus |
| 04/17/2013 | EP2580422A1 Device and method for producing high-pressure pulses |
| 04/17/2013 | CN202882857U Self-controlled oil well casing gas recovery device |
| 04/17/2013 | CN202882849U Rapid oil drain device capable of preventing sand plugging |
| 04/17/2013 | CN202882848U Downhole double-channel switch well controller |
| 04/17/2013 | CN202882847U Underground well erosion resistance throttling sand blaster |
| 04/17/2013 | CN202882846U Downhole isolating valve |
| 04/17/2013 | CN202882845U Nitrogen spring spare deflation valve of over-voltage cable excluder |
| 04/17/2013 | CN202882844U Sealing device of valve on well mouth |
| 04/17/2013 | CN202882805U Two-channel phase-changing watering and hot-washing device |
| 04/17/2013 | CN103046917A Underground electric hydraulic control fracturing sliding sleeve |
| 04/17/2013 | CN103046899A Electronic tag ball for underground control |
| 04/17/2013 | CN103046898A Novel valve needle of pressure control drilling throttle valve |
| 04/17/2013 | CN103046897A Valve needle of automatic adjusting throttle valve for pressure control drilling |
| 04/16/2013 | US8418770 Multi-process electronic control valve system |
| 04/16/2013 | US8418769 Tubular actuator and method |
| 04/16/2013 | CA2710008C Full bore injection valve |
| 04/16/2013 | CA2612397C Plug valve having a seal boss |
| 04/15/2013 | CA2755607A1 Sleeve valve |
| 04/11/2013 | WO2013052050A1 Downhole tester valve having rapid charging capabilities and method for use thereof |
| 04/11/2013 | WO2013052038A1 Debris resistant internal tubular testing system |