| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 02/21/2012 | US8118088 Shear activated safety valve system |
| 02/21/2012 | CA2403174C Multi-purpose float equipment and method |
| 02/20/2012 | CA2713973A1 Ball catcher with retention capability |
| 02/16/2012 | WO2012021474A2 Downhole fracture system and method |
| 02/16/2012 | WO2011095935A3 Methods of use for a positive displacement pump having an externally assisted valve |
| 02/16/2012 | US20120037380 Fracture valve tools and related methods |
| 02/16/2012 | US20120037373 Downhole fracture system and method |
| 02/16/2012 | US20120037360 Actuators and related methods |
| 02/15/2012 | CN202144737U 套管气限压回收装置 Casing head gas pressure limiting recovery |
| 02/15/2012 | CN202144727U 一种旋挖机用自动脱销新型内芯钻杆 One kind of rotary drilling machine with automatic stock new core drill |
| 02/15/2012 | CN101440700B 解脱封堵测试阀 Test relief valve closure |
| 02/14/2012 | US8113289 Flow regulator for downhole progressing cavity motor |
| 02/14/2012 | US8113287 Self sealing hydraulic coupler |
| 02/14/2012 | US8113286 Downhole barrier valve |
| 02/09/2012 | WO2012018700A2 Abrasive perforator with fluid bypass |
| 02/09/2012 | WO2012018496A2 Downhole displacement based actuator |
| 02/09/2012 | WO2012016276A2 Latching reciprocating valve assembly |
| 02/09/2012 | WO2011150048A3 Intelligent completion system for extended reach drilling wells |
| 02/09/2012 | US20120031625 Flow control device and flow control method |
| 02/09/2012 | US20120031624 Flow tube for use in subsurface valves |
| 02/09/2012 | US20120031623 Apparatus and method |
| 02/09/2012 | CA2807310A1 Abrasive perforator with fluid bypass |
| 02/08/2012 | EP2414628A1 Active in-situ controlled permanent downhole device |
| 02/08/2012 | EP2414621A2 Adjustable flow control devices for use in hydrocarbon production |
| 02/08/2012 | EP2313797B1 Control of sub surface safety valves |
| 02/08/2012 | CN202140073U 可调式油嘴套 Adjustable nozzle sets |
| 02/08/2012 | CN202140066U 浮球式开关 Float Switch |
| 02/08/2012 | CN202140065U 液压滑套 Hydraulic sleeve |
| 02/08/2012 | CN202140064U 油层多参数监测调参仪 Multi-parameter monitor reservoir parameter adjustment instrument |
| 02/08/2012 | CN102345452A Self-formed ball seat sliding sleeve |
| 02/07/2012 | CA2674135C Method for wellhead high integrity protection system |
| 02/02/2012 | WO2012014126A2 Frequency sweeping tubewave sources for liquid filled boreholes |
| 02/02/2012 | WO2011156372A3 Low impact ball-seat apparatus and method |
| 02/02/2012 | WO2011156368A3 Ball-seat apparatus and method |
| 02/02/2012 | WO2011156219A3 Method of determining position of a valve |
| 02/02/2012 | WO2011153621A3 Rotating flow control diverter |
| 02/02/2012 | WO2011151445A3 Gate valve, method for returned drilling mud pressure control and/or well killing, and uses of a gate valve |
| 02/02/2012 | US20120024546 Apparatus and method for autofill equipment activation |
| 02/02/2012 | US20120024537 Isolation valve with debris control and flow tube protection |
| 02/02/2012 | US20120024536 Wellhead tree pressure limiting device |
| 02/02/2012 | US20120024532 Pressure Vortex Device to Allow Flapper Closure in High Velocity Fluid Applications |
| 02/02/2012 | US20120024531 Autochoke system |
| 02/02/2012 | US20120024520 Well screens constructed utilizing pre-formed annular elements |
| 02/02/2012 | CA2806204A1 Frequency sweeping tubewave sources for liquid filled boreholes |
| 02/01/2012 | EP2412918A2 Isolation valve with debris control and flow tube protection |
| 02/01/2012 | EP2412917A1 Hydraulic bi-directional rotary isolation valve |
| 02/01/2012 | EP2411623A2 Active mud valve system |
| 02/01/2012 | CN202132018U Choke seat pressure release device of high-pressure manifold platform |
| 02/01/2012 | CN202132017U 全通径止回阀 Full bore valve |
| 02/01/2012 | CN202132012U 新型套管封井器 The new Casing Packer |
| 02/01/2012 | CN102337871A Underground adjustable concentric working barrel |
| 02/01/2012 | CN102337868A Automatic control system and method for offshore production platform |
| 02/01/2012 | CN102337864A Safety valve in pipe |
| 02/01/2012 | CN102337863A Rotary oil draining device |
| 02/01/2012 | CN102337862A Variable-diameter fracturing valve |
| 01/31/2012 | US8104540 Completion tool |
| 01/31/2012 | US8104535 Method of improving waterflood performance using barrier fractures and inflow control devices |
| 01/31/2012 | US8104337 Christmas tree with internally positioned flowmeter |
| 01/26/2012 | WO2011151730A3 Apparatus for emergency electrodynamic capping of pipes and wells |
| 01/26/2012 | US20120018172 Liner hanger fluid diverter tool and related methods |
| 01/26/2012 | US20120018170 Systems and techniques to actuate isolation valves |
| 01/26/2012 | US20120018169 Downhole displacement based actuator |
| 01/26/2012 | US20120018152 Fluid control in reservior fluid sampling tools |
| 01/26/2012 | CA2805955A1 A safety mechanism for a well, a well comprising the safety mechanism, and related methods |
| 01/25/2012 | EP2250338B1 Actuator device for downhole tools |
| 01/25/2012 | CN202125289U Sliding sleeve assembly of selective switch |
| 01/25/2012 | CN202125277U Sliding sleeve switch |
| 01/25/2012 | CN202125276U Throttle valve core for throttle manifold of petroleum drilling |
| 01/25/2012 | CN202125268U Sleeve tube pressure valve replacing mechanical device |
| 01/25/2012 | CN102330546A Open hole staged fracturing well completion pipe string provided with controllable valve and hydraulic control switching pipe string |
| 01/24/2012 | US8100181 Surface controlled subsurface safety valve having integral pack-off |
| 01/24/2012 | CA2668475C Valve for equalizer sand screens |
| 01/24/2012 | CA2626204C Reverse cementing float equipment |
| 01/19/2012 | WO2012009561A1 Apparatuses and methods for closing and reopening a pipe |
| 01/19/2012 | WO2012009400A2 Hydraulically controlled barrier valve equalizing system |
| 01/19/2012 | WO2012009311A2 Method and apparatus for a well employing the use of an activation ball |
| 01/19/2012 | WO2012009310A2 Method and apparatus for a well employing the use of an activation ball |
| 01/19/2012 | WO2012009098A2 Ball seat having collapsible helical seat |
| 01/19/2012 | WO2012008850A1 Binary control valve assembly |
| 01/19/2012 | WO2011147031A3 Downhole gas release apparatus |
| 01/19/2012 | WO2011146169A3 System and method for regulating pressure within a well annulus |
| 01/19/2012 | US20120012334 Method and apparatus for use with downhole tools having gas-filled cavities |
| 01/19/2012 | US20120012330 Apparatuses and methods for closing and reopening a pipe |
| 01/19/2012 | US20120012327 Hydraulically Controlled Barrier Valve Equalizing System |
| 01/19/2012 | US20120012322 Auto-production frac tool |
| 01/19/2012 | US20120012312 System and Method for Facilitating Downhole Operations |
| 01/19/2012 | CA2808452A1 Apparatuses and methods for closing and reopening a pipe |
| 01/19/2012 | CA2804871A1 Method and apparatus for a well employing the use of an activation ball |
| 01/19/2012 | CA2804868A1 Method and apparatus for a well employing the use of an activation ball |
| 01/18/2012 | EP2407635A2 Apparatus and methods for running liners |
| 01/18/2012 | EP2407634A2 Irregularly shaped flapper closure and sealing surfaces |
| 01/18/2012 | EP2225437B1 Valve assembly |
| 01/18/2012 | EP1848875B1 Flow regulator for use in a subterranean well |
| 01/18/2012 | CN202117628U Liquid flow diversion valve |
| 01/18/2012 | CN202117627U Overflow preventing device |
| 01/18/2012 | CN202117626U Disassembly-free flow controller for filtration |
| 01/18/2012 | CN202117625U Annular pressure control type underbalance well casing valve |
| 01/18/2012 | CN202117606U Blowout-preventing oil pipe head for non-well-killing valve replacing |
| 01/18/2012 | CN102325958A Screen flow equalization system |
| 01/18/2012 | CN102325957A Circulation control valve and associated method |