| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 01/18/2012 | CN102325956A Bidirectional sealing mechanically shifted ball valve for downhole use |
| 01/18/2012 | CN102322241A Special well head device for formation test of oil and gas wells |
| 01/17/2012 | US8096365 Hydraulic control system |
| 01/17/2012 | US8096363 Circulation control valve and associated method |
| 01/17/2012 | US8096362 Phase-controlled well flow control and associated methods |
| 01/17/2012 | CA2683222C Solenoid system for use in a downhole tool |
| 01/17/2012 | CA2493698C System and method for utilizing nano-scale filler in downhole applications |
| 01/12/2012 | WO2012006344A2 Dual-flow valve and swivel |
| 01/12/2012 | WO2012005869A2 Downhole multiple-cycle tool |
| 01/12/2012 | WO2012005830A2 Injection valve with indexing mechanism |
| 01/12/2012 | US20120006563 Retrievable inflow control device |
| 01/12/2012 | US20120006562 Method and apparatus for a well employing the use of an activation ball |
| 01/12/2012 | US20120006561 Method and apparatus for a well employing the use of an activation ball |
| 01/12/2012 | US20120006558 Submergible oil well sealing device and method for sealing underwater oil wells |
| 01/12/2012 | US20120006553 Injection Valve with Indexing Mechanism |
| 01/12/2012 | US20120006543 Downhole oil-water-solids separation |
| 01/12/2012 | CA2804400A1 Dual-flow valve and swivel |
| 01/11/2012 | EP2404027A2 Circulation control valve and associated method |
| 01/11/2012 | EP2118439B1 Communication tool for subsurface safety valve |
| 01/11/2012 | CN202108488U Hydraulic plunger wellhead close, quantitative and continuous dosing device |
| 01/11/2012 | CN202108472U Separated steam injection well ball-casting air-operated valve device |
| 01/11/2012 | CN202108471U Oil release device of oil production pipe string |
| 01/11/2012 | CN202108470U Constant-pressure circulating valve |
| 01/11/2012 | CN202108469U Well head pressure releasing device for sleeve of oil well |
| 01/11/2012 | CN202108468U Single-flow oil nozzle capable of adjusting pressure |
| 01/11/2012 | CN202108467U Wellhead quantitative water mixing valve |
| 01/11/2012 | CN202108466U Bivalve check valve of continuous pipe |
| 01/11/2012 | CN202108456U Multifunctional long-stopped well shut-in device for oil field |
| 01/11/2012 | CN202108454U Test oil wellhead device with metal sealing structure |
| 01/11/2012 | CN102312661A Drilling gas blow-out preventing system |
| 01/10/2012 | US8091630 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
| 01/10/2012 | CA2679495C Improved system and method for stimulating multiple production zones in a wellbore |
| 01/10/2012 | CA2671096C System and method for longitudinal and lateral jetting in a wellbore |
| 01/10/2012 | CA2660505C Methods and apparatus for a downhole tool |
| 01/10/2012 | CA2622531C System and method for capping abandoned wells |
| 01/05/2012 | WO2012002817A2 Valve assembly |
| 01/05/2012 | WO2012001671A2 Flow control valve for polymer solutions |
| 01/05/2012 | US20120000656 Apparatus And Methods For Producing Oil and Plugging Blowouts |
| 01/05/2012 | CA2804042A1 Flow control valve for polymer solutions |
| 01/05/2012 | CA2803482A1 Valve assembly |
| 01/04/2012 | CN202100236U Valve adjusting device in valve well |
| 01/04/2012 | CN202100235U Special oil draining device communicated with pipe string oil sleeve under oil producing well of oilfield |
| 01/04/2012 | CN202100234U Irregular-shaped check valve |
| 01/04/2012 | CN102305055A Air foam flooding shaft bottom foaming process pipe column |
| 01/04/2012 | CN101324179B Underwater electrohydraulic control valve |
| 01/03/2012 | US8087476 System and method for damping vibration in a drill string using a magnetorheological damper |
| 01/03/2012 | US8087463 Multi-position hydraulic actuator |
| 01/03/2012 | CA2660839C A fluid loss control system and method for controlling fluid loss |
| 01/03/2012 | CA2597564C One trip cemented expandable monobore liner system and method |
| 01/03/2012 | CA2580177C Rotating control head radial seal protection and leak detection systems |
| 01/03/2012 | CA2565133C Valve seat |
| 01/03/2012 | CA2512615C Actuator for well-head valve or other similar applications and system incorporating same |
| 01/03/2012 | CA2474998C Well system |
| 12/29/2011 | WO2011163305A2 Side pocket barrier valve gas lift and mandrel |
| 12/29/2011 | WO2011160193A1 Inflatable packer and control valve |
| 12/29/2011 | WO2011160160A1 A shut-in tool |
| 12/29/2011 | WO2011133810A3 High pressure and high temperature ball seat |
| 12/29/2011 | US20110315401 Side pocket barrier valve gas lift and mandrel |
| 12/29/2011 | US20110315396 Method and apparatus for controlling valves of a subsea oil spill containment assembly |
| 12/29/2011 | US20110315395 Method and apparatus for containing a defective blowout preventer (bop) stack using bopstopper assemblies having remotely controlled valves and heating elements |
| 12/29/2011 | US20110315394 Method and apparatus for containing an oil spill caused by a subsea blowout |
| 12/29/2011 | US20110315393 Method and apparatus for containing an undersea oil and/or gas spill caused by a defective blowout preventer (bop) |
| 12/29/2011 | US20110315392 Subsea apparatus |
| 12/29/2011 | US20110315390 Tool with Multi-Size Ball Seat Having Segmented Arcuate Ball Support Member |
| 12/29/2011 | US20110315389 Downhole Multiple Cycle Tool |
| 12/29/2011 | US20110315388 Flow energy dissipation for downhole injection flow control devices |
| 12/29/2011 | CA2803032A1 Inflatable packer and control valve |
| 12/28/2011 | CN202090894U 卡瓦提拉式泄油器 Kava uplifting bleeder |
| 12/28/2011 | CN202090893U 一种防掉旁通阀 An anti-off bypass valve |
| 12/28/2011 | CN202090892U 筒形回压阀 Cylindrical back pressure valve |
| 12/28/2011 | CN202090891U 环保取样防盗阀门 Environmental sampling valve theft |
| 12/28/2011 | CN202090890U 一种井下钻柱近钻头用止回阀 A downhole drill string near the drill bit with a check valve |
| 12/28/2011 | CN202090887U 一种井下环空防喷器 A downhole annular preventer |
| 12/28/2011 | CN202090882U 一种低压漏油失油层多功能保护装置 A low-pressure oil spill loss multifunction protection device |
| 12/28/2011 | CN202090848U 井下堵水作业管柱 Underground water shutoff string |
| 12/28/2011 | CN102296941A 钻具旁通阀 Drill bypass valve |
| 12/28/2011 | CN102296940A 可调式油嘴套 Adjustable nozzle sets |
| 12/28/2011 | CN102296939A 自动平衡压力胀捞一体化膨胀管工具及其使用方法 Automatic integration of the equilibrium pressure expansion pipe expansion of fishing tools and methods of use |
| 12/28/2011 | CN101514614B 干冰升华孔底冷冻保压取样器及取样方法 Dry ice sublimation hole bottom freezer packing sampler and sampling methods |
| 12/28/2011 | CN101324180B 一种水下液压换向阀 Underwater hydraulic valve |
| 12/28/2011 | CN101265793B Y管自平衡式井下开关 Y tube downhole self-balancing switch |
| 12/28/2011 | CN101087926B 膨胀清管器 Expansion of pig |
| 12/27/2011 | US8084979 Method for testing an electric motor |
| 12/22/2011 | WO2011159523A2 Method and apparatus for use with an inflow control device |
| 12/22/2011 | WO2011093717A3 A tool for installing units in a well |
| 12/22/2011 | WO2011057774A3 Integrated choke manifold system for use in a well application |
| 12/22/2011 | US20110308861 Expandable reamers for subterranean drilling and related methods |
| 12/22/2011 | US20110308807 Use of wired tubulars for communications/power in an in-riser application |
| 12/22/2011 | US20110308806 Method and apparatus for autonomous downhole fluid selection with pathway dependent resistance system |
| 12/22/2011 | CA2801594A1 Method and apparatus for use with an inflow control device |
| 12/21/2011 | EP2396583A1 Modular hot stab with improved connection flange |
| 12/21/2011 | EP2396501A2 Stage cementing tool |
| 12/21/2011 | CN202081863U 变长度分级滑套 Variable-length sleeve grading |
| 12/21/2011 | CN202081862U 液力控制循环开关 Hydraulic control loop switch |
| 12/21/2011 | CN202081861U 一种油气井地层测试专用井口装置 One kind of stratigraphic test wells dedicated wellhead |
| 12/21/2011 | CN202081860U 调压单流阀 Single flow regulator valve |
| 12/21/2011 | CN202081859U 一种注汽阀 An injection steam valve |
| 12/21/2011 | CN202081858U 一种抗高压硬密封闸阀 A high pressure seal gate hard anti- |
| 12/21/2011 | CN102287164A 一种液动井口安全阀控制系统用控制阀 One kind of hydraulic valve control system wellhead control valve |
| 12/15/2011 | WO2011156372A2 Low impact ball-seat apparatus and method |