| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 05/23/2012 | CN102472087A 可远程控制的变化流体流控制构造及方法 Remote control may be changes in fluid flow control structure and method |
| 05/23/2012 | CN102472086A 限流器 Flow restrictor |
| 05/23/2012 | CN102465712A 超长钻孔高压水射流钻割联动煤层瓦斯抽放与防突系统及方法 Bored high pressure water jet cutting linkage seam gas drainage drilling and outburst prevention system and method |
| 05/23/2012 | CN102465684A 压力感应阀 Pressure sensing valve |
| 05/23/2012 | CN101619652B Selective flow string |
| 05/22/2012 | US8181705 Fluid injection device |
| 05/22/2012 | CA2644122C A multi-way valve with fan-shaped flow channel sealing pair |
| 05/18/2012 | WO2012064946A2 Magnetically coupled actuation apparatus and method |
| 05/18/2012 | WO2012033638A3 Series configured variable flow restrictors for use in a subtrerranean well |
| 05/18/2012 | WO2012014126A3 Frequency sweeping tubewave sources for liquid filled boreholes |
| 05/17/2012 | US20120119125 Drive Device |
| 05/17/2012 | US20120118646 Borehole cutting assembly for directional cutting |
| 05/17/2012 | US20120118582 Magnetically coupled actuation apparatus and method |
| 05/17/2012 | US20120118579 Multi-Position Valve for Fracturing and Sand Control and Associated Completion Methods |
| 05/17/2012 | US20120118564 Erosion Tracer And Monitoring System And Methodology |
| 05/16/2012 | EP2453104A1 Downhole device |
| 05/16/2012 | EP2452042A2 Flow restrictor device |
| 05/16/2012 | CN202220585U Anti-resetting sliding sleeve tubing drain |
| 05/16/2012 | CN202220584U Top driving plug valve assembly |
| 05/16/2012 | CN202220583U Air release valve for casing of oil production well |
| 05/16/2012 | CN202220582U Portable floating type oil well check valve |
| 05/16/2012 | CN102454384A Three-proofing bypass-valve for screw drill |
| 05/16/2012 | CN102454383A Selective torque operator for a valve |
| 05/16/2012 | CN102454382A Straight-through adjustable throttling valve with high strength |
| 05/16/2012 | CN102454376A Double-well ocean oil extraction wellhead device |
| 05/16/2012 | CN102454370A Constant-pressure protection device of screw drilling tool |
| 05/10/2012 | WO2012027135A3 Tool with multisize ball seat having segmented arcuate ball support member |
| 05/10/2012 | WO2011104516A3 Pressure-activated valve for hybrid coiled tubing jointed tubing tool string |
| 05/10/2012 | US20120111577 Variable flow resistance system with circulation inducing structure therein to variably resist flow in a subterranean well |
| 05/10/2012 | US20120111576 Downhole tool |
| 05/10/2012 | US20120111575 Subsurface Safety Valve Flapper |
| 05/10/2012 | US20120111574 Delayed opening wellbore tubular port closure |
| 05/10/2012 | US20120111572 Emergency control system for subsea blowout preventer |
| 05/10/2012 | US20120111566 Apparatus and method for stimulating subterranean formations |
| 05/09/2012 | EP2449295A2 Tubular valving system and method |
| 05/09/2012 | EP2449293A2 Tubular valve system and method |
| 05/09/2012 | EP2449211A2 Remotely controllable manifold |
| 05/09/2012 | EP2449209A2 System and method for intermittent gas lift |
| 05/09/2012 | EP2449208A2 Remotely controllable variable flow control configuration and method |
| 05/09/2012 | EP2449207A2 Modular valve body and method of making |
| 05/09/2012 | CN202215222U Three-pipe thermal recovery wellhead of extremely-thicken oil horizontal well fireflood-assisted gravity drainage |
| 05/09/2012 | CN202215202U Opener for separate-layer acidification drain valve |
| 05/09/2012 | CN202215201U Open-close valve for natural gas wellhead pipeline |
| 05/09/2012 | CN202215200U Control tubular column for liquid quantitative injection |
| 05/09/2012 | CN202215199U Multi-flow-passage oil nozzle of oil production well |
| 05/09/2012 | CN202215198U Multi-sensor pressure relief valve |
| 05/09/2012 | CN202215181U Pilot production multifunctional integrated wellhead flow device |
| 05/09/2012 | CN202215180U Concentric tube wellhead assembly for thickened oil exploitation of steam-assisted gravity drainage |
| 05/09/2012 | CN101718167B Check valve device installed on well out of control |
| 05/08/2012 | US8171999 Downhole flow control device and method |
| 05/08/2012 | US8171998 System for controlling hydrocarbon bearing zones using a selectively openable and closable downhole tool |
| 05/08/2012 | CA2675395C System, method and apparatus for split gate valve with mechanically isolated seal surfaces |
| 05/08/2012 | CA2597563C One trip cemented expandable monobore liner system and method |
| 05/03/2012 | WO2012058544A1 Collapsible casing device for use in controlling flow |
| 05/03/2012 | WO2012009310A3 Method and apparatus for a well employing the use of an activation ball |
| 05/03/2012 | WO2011095512A3 Flow control device and flow control method |
| 05/03/2012 | US20120106297 Downhole apparatus, device, assembly and method |
| 05/03/2012 | US20120103628 Method and Apparatus for Single-Trip Time Progressive Wellbore Treatment |
| 05/03/2012 | US20120103627 System and method for control of tools in a subterranean completion application |
| 05/03/2012 | US20120103619 Drill String Valve and Method |
| 05/03/2012 | US20120103618 Coiled tubing bottom hole assembly with packer and anchor assembly |
| 05/03/2012 | US20120103595 Sintered Polycrystalline Diamond Tubular Members |
| 05/03/2012 | US20120103594 System for a Downhole String with a Downhole Valve |
| 05/03/2012 | DE102010043351A1 Submarine control system has control module with multiple double ball valve units, where each double ball valve unit is connected with supply line, vent line and functional line connected with submarine device |
| 05/03/2012 | CA2719371A1 Downhole valve member |
| 05/02/2012 | EP2447466A2 Downhole flow device with erosion resistant and pressure assisted metal seal |
| 05/02/2012 | EP2446108A1 A completion assembly for stimulating, segmenting and controlling erd wells |
| 05/02/2012 | EP2446107A1 A completion assembly and a method for stimulating, segmenting and controlling erd wells |
| 05/02/2012 | EP2446105A2 Through tubing intelligent completion and method |
| 05/01/2012 | US8167049 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
| 05/01/2012 | US8167048 Frac gate and well completion methods |
| 05/01/2012 | US8167047 Method and apparatus for wellbore fluid treatment |
| 05/01/2012 | CA2756519A1 Method and apparatus for single-trip time progressive wellbore treatment |
| 05/01/2012 | CA2657546C System and method for selectively communicatable hydraulic nipples |
| 04/26/2012 | WO2012054324A2 Remotely controllable fluid flow control assembly |
| 04/26/2012 | WO2012053935A1 Autonomous cut-off device |
| 04/26/2012 | WO2012051705A1 Tools and methods for use in completion of a wellbore |
| 04/26/2012 | WO2012021474A3 Downhole fracture system and method |
| 04/26/2012 | WO2012018496A3 Downhole displacement based actuator |
| 04/26/2012 | WO2012009400A3 Hydraulically controlled barrier valve equalizing system |
| 04/26/2012 | WO2012005830A3 Injection valve with indexing mechanism |
| 04/26/2012 | US20120097398 Multi-Zone Fracturing Completion |
| 04/26/2012 | US20120097397 Fracturing System and Method |
| 04/26/2012 | US20120097394 Modular dart launching valve |
| 04/26/2012 | US20120097386 Downhole Flow Device with Erosion Resistant and Pressure Assisted Metal Seal |
| 04/26/2012 | CA2852311A1 Tools and methods for use in completion of a wellbore |
| 04/26/2012 | CA2815184A1 Autonomous cut-off device |
| 04/26/2012 | CA2721545A1 Downhole flow device with erosion resistant and pressure assisted metal seal |
| 04/25/2012 | EP2443310A2 Downhole tools and methods of setting in a wellbore |
| 04/25/2012 | CN202202841U 高压泄压阀 High pressure relief valve |
| 04/25/2012 | CN202202840U 双管安全控制阀 Double-barreled security control valve |
| 04/25/2012 | CN202202839U 一种油田勘探开发用桥式分流装置 One kind of oil exploration and development with a bridge dividing device |
| 04/25/2012 | CN101307680B 螺杆钻具用旁通阀 Screw drill with a bypass valve |
| 04/24/2012 | US8162066 Tubing weight operation for a downhole tool |
| 04/24/2012 | CA2483174C Drill string shutoff valve |
| 04/19/2012 | WO2012051196A2 Lift-gas optimization with choke control |
| 04/19/2012 | WO2012050905A1 Keyless bearing sleeve for subterranean applications |
| 04/19/2012 | WO2012018700A3 Abrasive perforator with fluid bypass |
| 04/19/2012 | WO2012009311A3 Method and apparatus for a well employing the use of an activation ball |
| 04/19/2012 | WO2012005869A3 Downhole multiple-cycle tool |