| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 10/06/2011 | WO2011120959A2 An actuator device |
| 10/06/2011 | WO2011058325A3 Downhole progressive pressurization actuated tool and method of using the same |
| 10/06/2011 | US20110240311 Indexing Sleeve for Single-Trip, Multi-Stage Fracing |
| 10/06/2011 | US20110240301 Indexing Sleeve for Single-Trip, Multi-Stage Fracing |
| 10/06/2011 | US20110240299 Subterranean well valve activated with differential pressure |
| 10/06/2011 | US20110240298 Wellhead valve system for adjusting the flow with integrated multiphase flow rate measuring ability |
| 10/06/2011 | US20110240290 Shunt isolation valve |
| 10/06/2011 | US20110240284 Tubular Embedded Nozzle Assembly for Controlling the Flow Rate of Fluids Downhole |
| 10/06/2011 | CA2794815A1 An actuator device |
| 10/06/2011 | CA2792475A1 Device for a plug construction for conducting well tests |
| 10/05/2011 | EP2372080A2 Indexing sleeve for single-trip, multi-stage fracturing |
| 10/05/2011 | EP2370665A1 Flow control device |
| 10/05/2011 | EP2370664A1 Bellows valve |
| 10/05/2011 | EP2370662A1 Mechanical bi-directional isolation valve |
| 10/05/2011 | CN202000963U Improved subsurface safety valve |
| 10/05/2011 | CN202000962U Control sliding sleeve switch for segmented exploitation of oil and gas well |
| 10/05/2011 | CN202000961U Pulling-type tubing drain below pump |
| 10/05/2011 | CN202000960U Subsurface safety valve |
| 10/05/2011 | CN1922385B Method and actuator device |
| 10/05/2011 | CN1910337B Control system communication and lock open tool and method for locking open a safety valve and communicating with surface |
| 10/05/2011 | CN102209833A Disposal of well control fluids |
| 10/04/2011 | US8028752 Plug setting and retrieving apparatus |
| 10/04/2011 | CA2655577C Hydraulic metering valve for operation of downhole tools |
| 10/04/2011 | CA2542964C Instrumented internal blowout preventer valve for measuring drill string drilling parameters |
| 10/04/2011 | CA2520141C Surface flow controlled valve and screen |
| 10/02/2011 | CA2735402A1 Indexing sleeve for single-trip, multi-stage fracing |
| 09/30/2011 | CA2735753A1 Fluid system component with sacrificial element |
| 09/29/2011 | WO2011119728A2 System, assembly and method for port control |
| 09/29/2011 | WO2011119675A1 Apparatus and method for well operations |
| 09/29/2011 | WO2011119668A1 Apparatus and method for well operations |
| 09/29/2011 | WO2011119448A2 Remotely operated isolation valve |
| 09/29/2011 | WO2011119157A1 Electrically operated isolation valve |
| 09/29/2011 | WO2011119156A1 Bi-directional flapper/sealing mechanism and technique |
| 09/29/2011 | WO2011117602A2 Mechanical counter |
| 09/29/2011 | WO2011117601A2 Downhole actuating apparatus |
| 09/29/2011 | WO2011094084A3 Control system for a surface controlled subsurface safety valve |
| 09/29/2011 | WO2011082097A3 Gas lift barrier valve |
| 09/29/2011 | US20110232922 Foot valve assembly for a down hole drill |
| 09/29/2011 | US20110232917 Electrically operated isolation valve |
| 09/29/2011 | US20110232916 Bi-directional flapper/sealing mechanism and technique |
| 09/29/2011 | US20110232915 System, assembly and method for port control |
| 09/29/2011 | US20110232899 Composite reconfigurable tool |
| 09/29/2011 | CA2794331A1 Mechanical counter |
| 09/29/2011 | CA2794111A1 System, assembly and method for port control |
| 09/28/2011 | EP2368011A2 Linear actuation system in the form of a ring |
| 09/28/2011 | CN201991487U 找水管柱井底防喷专用开关 Bottom of the blowout preventer to find water column dedicated switch |
| 09/28/2011 | CN201991486U 杠杆式浮阀 Leveraged float valve |
| 09/28/2011 | CN201991485U 双液缸油套连通开关阀 Dual hydraulic cylinders communicating oil jacket off valve |
| 09/28/2011 | CN201991478U 一种组合式采油树 A modular Christmas tree |
| 09/28/2011 | CN1961133B Case of downhole tool with aperture |
| 09/27/2011 | US8025104 Method and apparatus for delayed flow or pressure change in wells |
| 09/27/2011 | US8024847 Method of manufacturing a downhole lubricator valve |
| 09/27/2011 | CA2618693C Convertible seal |
| 09/22/2011 | WO2011116207A1 Differential shifting tool and method of shifting |
| 09/22/2011 | WO2011115710A2 Well assembly with a composite fiber sleeve for an opening |
| 09/22/2011 | WO2011115494A1 Flow control device and flow control method |
| 09/22/2011 | WO2011113155A1 Casing fill-up fluid management tool |
| 09/22/2011 | WO2011072121A3 Wireline run mechanically or hydraulically operated subterranean insert barrier valve and associated landing nipple |
| 09/22/2011 | US20110226491 Downhole tool of high pressure operating cycle capability |
| 09/22/2011 | US20110226485 Dual ball upper internal blow out preventer valve |
| 09/22/2011 | US20110226483 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
| 09/22/2011 | CA2830353A1 Differential shifting tool and method of shifting |
| 09/22/2011 | CA2793722A1 Flow control device and flow control method |
| 09/22/2011 | CA2792999A1 Well assembly with a composite fiber sleeve for an opening |
| 09/22/2011 | CA2792805A1 Casing fill-up fluid management tool |
| 09/21/2011 | EP2366058A1 Apparatus and method for servicing a wellbore |
| 09/21/2011 | CN201982085U 智能测控流量装置 Intelligent monitoring and control flow device |
| 09/21/2011 | CN201982072U 注水流量调控装置 Water flow control devices |
| 09/21/2011 | CN201982060U 井下液控开关器 Downhole fluid control switch device |
| 09/21/2011 | CN201982059U 集成式井口组合阀 Integrated wellhead valve combination |
| 09/21/2011 | CN201982058U 油井高压金属密封旋柱阀 High pressure metal oil-sealed rotary cylinder valve |
| 09/21/2011 | CN201982055U 多功能封井器 Multifunction blowout preventer |
| 09/21/2011 | CN201982035U 独立式高压油水气井不压井作业装置 Independent high-pressure oil wells snubbing unit |
| 09/21/2011 | CN102197190A Utilizing swellable materials to control fluid flow |
| 09/21/2011 | CN102191926A Long-distance adjustable control valve |
| 09/20/2011 | US8020635 Expandable reamer apparatus |
| 09/20/2011 | US8020623 Control module for subsea equipment |
| 09/20/2011 | CA2627838C Downhole deployment valves |
| 09/20/2011 | CA2578501C Adjustable venturi valve |
| 09/15/2011 | WO2011110816A2 Well barrier |
| 09/15/2011 | WO2011110815A2 Operational control of multiple valves in a well |
| 09/15/2011 | WO2011110808A2 Multiple stage cementing tool with expandable sealing element |
| 09/15/2011 | WO2011072047A3 Wireline run mechanically or hydraulically operated subterranean insert barrier valve and associated landing nipple |
| 09/15/2011 | US20110220367 Operational control of multiple valves in a well |
| 09/15/2011 | CA2792337A1 Well barrier |
| 09/15/2011 | CA2696149A1 Rotational valve actuator (rva) |
| 09/14/2011 | CN201973247U 环带式高压防爆电磁阀 Annulus-pressure explosion-proof solenoid valve |
| 09/14/2011 | CN201972700U 耐用取样器 Durable sampler |
| 09/14/2011 | CN201972663U 一种油气井开采分段控制滑套 One kind of exploitation of oil and gas wells segmented control sleeve |
| 09/14/2011 | CN201972662U 一种阀体总成密封装置 One kind of valve assembly sealing device |
| 09/14/2011 | CN201972661U 一种投球开启自锁滑套 One kind of pitching to open self-locking sleeve |
| 09/14/2011 | CN201972660U 防盗手轮和手轮护罩及开关工具 Theft handwheel and handwheel guard and switch tools |
| 09/14/2011 | CN102182438A Layered fracturing technology for variable-length graded sliding sleeve |
| 09/14/2011 | CN102182423A Sleeve valve opening/closing device |
| 09/14/2011 | CN102182422A Pressure-adjusting check valve |
| 09/13/2011 | US8016035 Chemical injection check valve incorporated into a tubing retrievable safety valve |
| 09/13/2011 | US8016033 Continuous flow drilling systems and methods |
| 09/09/2011 | WO2011107082A1 Device and method for producing high-pressure pulses |
| 09/09/2011 | CA2791719A1 Flow control arrangement and method |
| 09/08/2011 | US20110214882 System and method for safe well control operations |