| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 07/25/2012 | CN202348227U Pluggable leakage prevention valve for oil layer |
| 07/25/2012 | CN202348226U Two-directional stabilizer |
| 07/25/2012 | CN202348225U Kelly bar plug valve |
| 07/25/2012 | CN202348224U Piston air valve type automatic pressure release valve of thermal production well |
| 07/25/2012 | CN202348223U Automatic shackle-assembling device for anti-spraying plug valve |
| 07/25/2012 | CN202348222U Lifting device of blowout-prevention plug valve |
| 07/25/2012 | CN202348221U Automatic dewatering device for kill manifold |
| 07/25/2012 | CN202348220U Splash-proof valve for kelly bar |
| 07/25/2012 | CN102612589A Flow control device that substantially decreases flow of a fluid when a property of the fluid is in a selected range |
| 07/25/2012 | CN102606110A Composite sliding sleeve, fracturing device and method for increasing well fracturing layer section |
| 07/25/2012 | CN102606109A Valve-type oil tube floating valve device |
| 07/25/2012 | CN102606108A Pitching pressure-out opening oil tube constant-pressure floating valve |
| 07/25/2012 | CN101691835B Layered high-pressure high-resolution adjustable water injection valve in oilfield |
| 07/25/2012 | CN101624904B Open hole completion well sand resistant pipe string of sidetracking branch well and inserting type acid cleaning filling inner pipe string thereof |
| 07/25/2012 | CN101482002B Built-in pipe lofting device |
| 07/24/2012 | US8225874 Gas lift valve assembly and method of using |
| 07/24/2012 | US8225871 Bidirectional sealing mechanically shifted ball valve for downhole use |
| 07/19/2012 | WO2012097280A2 Rotational wellbore test valve |
| 07/19/2012 | WO2012095183A1 Autonomous valve |
| 07/19/2012 | WO2012094749A1 Flow control diverter valve |
| 07/19/2012 | WO2012051196A3 Lift-gas optimization with choke control |
| 07/19/2012 | US20120181044 Flow control diverter valve |
| 07/19/2012 | US20120181043 Electric submersible pumping completion flow diverter system |
| 07/19/2012 | US20120181037 Variable flow restrictor for use in a subterranean well |
| 07/19/2012 | US20120181036 Downhole adjustable inflow control device for use in a subterranean well |
| 07/19/2012 | US20120181021 Rotational test valve with tension reset |
| 07/19/2012 | US20120181018 Rotational wellbore test valve |
| 07/19/2012 | CA2824302A1 Autonomous valve |
| 07/18/2012 | EP2475842A2 Tubular seat and tubular actuating system |
| 07/18/2012 | EP2475835A2 Valves, bottom hole assemblies, and methods of selectively actuating a motor |
| 07/18/2012 | CN202338280U 一种中心管式整体泄油器 One kind of central tube overall bleeder |
| 07/18/2012 | CN202338279U 一种可变径压裂阀 One kind of fracture can be adjustable valve |
| 07/18/2012 | CN202338278U Oil pipe uniflow apparatus for horizontal well |
| 07/18/2012 | CN202338277U 井下循环开关阀 Downhole circulation off valve |
| 07/18/2012 | CN202338276U 井下关井测试阀 Downhole shut-test valve |
| 07/18/2012 | CN202338275U 油水井防冻取样阀 Oil wells antifreeze sampling valve |
| 07/18/2012 | CN202338274U 外壁有环形台肩的井口阀钢圈 Outer annular shoulder of the wellhead valve rims |
| 07/18/2012 | CN202338269U Mud return preventing device for sidetrack horizontal well |
| 07/18/2012 | CN202338256U 自喷井自动泄压导向油嘴 Self-guided automatic pressure relief wells spray nozzle |
| 07/18/2012 | CN202338245U 井口阀钢圈取出工具 Wellhead valve removal tool steel ring |
| 07/18/2012 | CN102597415A Hydraulic control system minitoring apparatus and method |
| 07/18/2012 | CN102587860A Removable anti-blocking safety valve and special fishing tool for same |
| 07/17/2012 | US8220542 System and method for facilitating downhole operations |
| 07/17/2012 | US8220535 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
| 07/17/2012 | US8220534 Safety device for an oil well and associated safety installation |
| 07/17/2012 | US8220533 Downhole piezoelectric devices |
| 07/17/2012 | CA2689343C Removable injection or production flow equalization valve |
| 07/17/2012 | CA2555717C Method for operating an actuator and an actuator device for use in drainage pipe used for producing oil and/or gas |
| 07/12/2012 | WO2012094194A2 Low equivalent circulation density setting tool |
| 07/12/2012 | WO2012094164A2 Method and apparatus for multi-drop tool control |
| 07/12/2012 | WO2012094117A2 Subsea safety system having a protective frangible liner and method of operating same |
| 07/12/2012 | WO2011110808A3 Multiple stage cementing tool with expandable sealing element |
| 07/12/2012 | US20120175132 Low Equivalent Circulation Density Setting Tool |
| 07/12/2012 | US20120175126 Subsea Safety System Having a Protective Frangible Liner and Method of Operating Same |
| 07/12/2012 | US20120175106 Drilling Fluid Diverting Sub |
| 07/12/2012 | US20120175103 Apparatus and Method for Recovering Fluids From a Well and/or Injecting Fluids Into a Well |
| 07/12/2012 | CA2823708A1 Low equivalent circulation density setting tool |
| 07/11/2012 | CN202325490U 一种间歇油井出液指示及止回装置 An oil well fluid instructions and check out the device intermittently |
| 07/11/2012 | CN202325457U Naked eye segmented fracturing completion string for placement of controllable valves and liquid control switch string |
| 07/11/2012 | CN202325452U 注聚流量调节器 Polymer injection flow regulator |
| 07/11/2012 | CN202325449U 一种电泵井注水阀 One kind of pump wells injection valve |
| 07/11/2012 | CN202325408U 外滑套反循环短节 Outer sleeve short section of reverse circulation |
| 07/11/2012 | CN202325407U 在油田井下实现开关井的盘式开关 Downhole well in achieving switch disc switch |
| 07/11/2012 | CN202325406U Bridge-through lateral uniflow forward-direction pressure guide valve |
| 07/11/2012 | CN202325405U 复合密封单流阀 Single composite sealing valve |
| 07/11/2012 | CN202325404U 保压取心球阀 Coring valve packing |
| 07/11/2012 | CN202325403U 用于憋压式取心工具的旁通阀 Used to hold pressure-coring tool bypass valve |
| 07/11/2012 | CN202325402U 防喷旋塞阀 BOP cock |
| 07/11/2012 | CN202325401U 用于油田井口与集输系统控制阀门的集成阀体 For oilfield wellhead and gathering system integrated control valve body |
| 07/11/2012 | CN202325400U 用于油田采油、注水及集输系统控制阀门的集成阀体 For oilfield water injection and gathering system integrated control valve body |
| 07/11/2012 | CN202325399U 采油树堵头防盗器 Christmas tree plug alarm |
| 07/11/2012 | CN202325398U 油井套管气自动控制装置 Gas well casing automatic control device |
| 07/11/2012 | CN202325346U 抽油井空心杆井口装置 Hollow rod pumping wells wellhead |
| 07/11/2012 | CN102575509A Tubular valving system and method |
| 07/11/2012 | CN102562004A One-trip tubing string separate-injection coproduction method for thick oil thermal recovery well |
| 07/11/2012 | CN102561996A Intelligent well killing system |
| 07/11/2012 | CN102561995A Underground floating valve with high-temperature resistance, high-pressure resistance and corrosion resistance |
| 07/11/2012 | CN102561994A Completion reoperation blowout control tail tube valve |
| 07/11/2012 | CN102561993A Zero-friction flat valve of Christmas tree |
| 07/11/2012 | CN102561982A Internal blowout-proof tool for steam flooding well oil tube |
| 07/11/2012 | CN102561977A High-pressure high-flow water burst hole drilling safety system, mounting process thereof and service process |
| 07/11/2012 | CN102561976A Multifunctional fully-enclosed anti-theft wellhead device |
| 07/11/2012 | CN101338657B Hydraulically controlled underbalance downhole casing valve |
| 07/10/2012 | US8215418 Expandable reamer apparatus and related methods |
| 07/10/2012 | US8215411 Cluster opening sleeves for wellbore treatment and method of use |
| 07/10/2012 | US8215408 Actuation system for well tools |
| 07/10/2012 | US8215404 Stage cementing tool |
| 07/10/2012 | US8215382 Motion transfer from a sealed housing |
| 07/05/2012 | WO2012092230A2 High pressure high temperature (hpht) well tool control system and method |
| 07/05/2012 | WO2012091984A2 Dissolvable barrier for downhole use and method thereof |
| 07/05/2012 | WO2012091829A2 Method and apparatus for controlling fluid flow into a wellbore |
| 07/05/2012 | WO2012091758A1 Conformable inflow control device and method |
| 07/05/2012 | WO2012030843A3 Methods for completing multi-zone production wells using sliding sleeve valve assembly |
| 07/05/2012 | US20120168175 Method and apparatus for controlling fluid flow into a borehole |
| 07/05/2012 | US20120168174 Method and apparatus for multi-drop tool control |
| 07/05/2012 | US20120168171 Subsea pressure control system |
| 07/05/2012 | US20120168169 Subsea tree workover control system |
| 07/05/2012 | US20120168163 Method and apparatus for completing a multi-stage well |
| 07/05/2012 | US20120168146 High pressure high temperature (hpht) well tool control system and method |
| 07/05/2012 | CA2822571A1 Method and apparatus for controlling fluid flow into a wellbore |