| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
|---|
| 08/18/2010 | CN201554424U Oil casing ommunicating device |
| 08/18/2010 | CN201554423U Deep well pump travelling valve of heavy oil well |
| 08/18/2010 | CN201554422U Side open type sand control bottom valve |
| 08/18/2010 | CN201554421U Self-operated energy-saving control valve of oil well |
| 08/18/2010 | CN201554409U High-pressure manifold of drilling simulator |
| 08/18/2010 | CN201554408U Throttle manifold of drilling simulator |
| 08/18/2010 | CN101806200A Interlaminar multistep control valve used for well completion |
| 08/18/2010 | CN100999987B Electrohydraulic compound switch controlling valve for oil water well working with pressure |
| 08/17/2010 | US7775291 Retrievable surface controlled subsurface safety valve |
| 08/17/2010 | US7775285 Apparatus and method for servicing a wellbore |
| 08/17/2010 | US7775284 Apparatus for adjustably controlling the inflow of production fluids from a subterranean well |
| 08/17/2010 | US7775283 Valve for equalizer sand screens |
| 08/17/2010 | US7775273 Tool using outputs of sensors responsive to signaling |
| 08/17/2010 | US7775269 Communication tool for accessing a non annular hydraulic chamber of a subsurface safety valve |
| 08/17/2010 | CA2552170C Reverse flow flow trim for choke valve |
| 08/12/2010 | WO2010089728A2 Mechanical sliding sleeve |
| 08/12/2010 | WO2009113872A3 Device for fixing a valve to a tubular member |
| 08/12/2010 | US20100200245 Hydraulic Lockout Device for Pressure Controlled Well Tools |
| 08/12/2010 | US20100200244 Method of and apparatus for completing a well |
| 08/12/2010 | US20100200243 Method and device |
| 08/12/2010 | US20100200225 Multi-functional completion tool |
| 08/12/2010 | US20100200220 Pressure Equalization Device for Downhole Tools |
| 08/11/2010 | EP2216503A1 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
| 08/11/2010 | EP2216502A1 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
| 08/11/2010 | EP2216500A2 Hydraulic lockout device for pressure controlled well tools |
| 08/11/2010 | EP2216498A2 Latch position indicator system and method |
| 08/11/2010 | CN201547305U Cock valve with high-performance |
| 08/11/2010 | CN201546697U Oil logging instrument balance device |
| 08/11/2010 | CN201546675U Interlayer control valve used for well completion |
| 08/11/2010 | CN201546674U Novel multi-functional double-effect valve |
| 08/11/2010 | CN201546673U Leakproof valve-switch tool used in multilayer sand-prevention well |
| 08/11/2010 | CN201546672U Preset underground high pressure throttle |
| 08/11/2010 | CN201546671U Low-torque kelly cock valve |
| 08/11/2010 | CN201546670U Low-torque upper kelly cock valve |
| 08/11/2010 | CN201546669U High-pressure manifold plug valve |
| 08/11/2010 | CN101799008A Oil well pump fuel charging valve capable of transmitting pressure |
| 08/10/2010 | US7770652 Ball release procedure and release tool |
| 08/10/2010 | CA2547201C Interventionless reservoir control systems |
| 08/05/2010 | WO2010087719A1 Flow control device and flow control method |
| 08/05/2010 | WO2010086654A1 Apparatus and method |
| 08/05/2010 | US20100193196 Valve |
| 08/05/2010 | US20100193181 Method of running dts measurements in combination with a back pressure valve |
| 08/05/2010 | CA2749107A1 Apparatus and method |
| 08/04/2010 | CN1912335B Sealing process for preventing block of kelly bar plug valve |
| 08/04/2010 | CN101793146A Method for testing strata of horizontal well |
| 08/03/2010 | US7766086 Fluid actuated circulating sub |
| 08/03/2010 | US7766084 Downhole tool |
| 07/29/2010 | WO2010085667A2 Bidirectional sealing mechanically shifted ball valve for downhole use |
| 07/29/2010 | US20100186968 Method and Apparatus for Continuously Injecting Fluid in a Wellbore While Maintaining Safety Valve Operation |
| 07/29/2010 | US20100186967 Assembly for Controlled Delivery of Downhole Treatment Fluid |
| 07/28/2010 | CN201535149U Pilot-operated sliding sleeve switch |
| 07/28/2010 | CN201535148U Well mouth return pressure controller |
| 07/28/2010 | CN1965147B Duplex cone expander for expanding a tubular upward and downward from preexpanded section |
| 07/28/2010 | CN101787866A Pilot-operated type self-holding electromagnetic valve for gas well mouth |
| 07/27/2010 | US7762336 Flapper latch |
| 07/27/2010 | US7762335 Switching apparatus between independent control systems for a subsurface safety valve |
| 07/27/2010 | US7762333 Hydraulically openable ported sub |
| 07/27/2010 | US7762324 Bypass crossover sub selector for multi-zone fracturing processes |
| 07/27/2010 | CA2691257A1 A method of running dts measurements in combination with a back pressure valve |
| 07/23/2010 | CA2843619A1 Downhole tool assembly with debris relief, and method for using same |
| 07/23/2010 | CA2820652A1 Downhole tool assembly with debris relief, and method for using same |
| 07/23/2010 | CA2749636A1 Downhole tool assembly with debris relief, and method for using same |
| 07/22/2010 | WO2010065311A3 Tubing weight operation for a downhole tool |
| 07/22/2010 | WO2010056783A3 Tubing pressure insensitive control system |
| 07/21/2010 | EP2208242A2 Nested flextensional transducer and cylindrical actuator modules |
| 07/21/2010 | CN201531248U Differential-pressure type oil drain device |
| 07/21/2010 | CN201531247U Anti-spit back screw drilling tool bypass valve |
| 07/21/2010 | CN201531246U Multi-functional tool in underground oil pipe |
| 07/21/2010 | CN201531245U Adjustable valve of layered hollow production mandrel in oil field |
| 07/21/2010 | CN201531240U Combined choke free of disassembly and assembly |
| 07/21/2010 | CN201531238U Non-welding universal wellhead flow passage device |
| 07/21/2010 | CN101781978A Integrated control system for safety block valve |
| 07/20/2010 | US7759827 DC voltage converting device having a plurality of DC voltage converting units connected in series on an input side and in parallel on an output side |
| 07/20/2010 | US7757772 Modular backup fluid supply system |
| 07/20/2010 | US7757764 Method for drilling and casing a wellbore with a pump down cement float |
| 07/20/2010 | CA2461485C Gas lift valve |
| 07/15/2010 | WO2010051402A3 Linear actuation system in the form of a ring |
| 07/15/2010 | US20100175894 Single trip well completion system |
| 07/15/2010 | US20100175888 Downhole Device Actuator and Method |
| 07/15/2010 | US20100175887 Subsurface Safety Valve Flapper |
| 07/15/2010 | US20100175882 Subsea Internal Riser Rotating Control Device System and Method |
| 07/15/2010 | US20100175868 Modular Electro-Hydraulic Controller for Well Tool |
| 07/15/2010 | US20100175867 Well Tools Incorporating Valves Operable by Low Electrical Power Input |
| 07/14/2010 | EP2206880A2 Modular electro-hydraulic controller for well tool |
| 07/14/2010 | EP2205824A2 Subsea assembly |
| 07/14/2010 | EP2205822A2 Object manoeuvring apparatus |
| 07/14/2010 | CN101775966A Novel ultrahigh pressure throttling protection technology |
| 07/13/2010 | US7753127 Bottomhole tool and a method for enhanced oil production and stabilization of wells with high gas-to-oil ratio |
| 07/13/2010 | US7753112 Fluid production system and method |
| 07/08/2010 | WO2010039511A3 Subsea system and method for protecting equipment of a subsea system |
| 07/07/2010 | EP2204529A2 Mechanically operated hydraulic valve actuator |
| 07/07/2010 | CN201521286U Anti-dredging resistance-accounting concentric switch of water injection well |
| 07/07/2010 | CN201521281U Safety valve |
| 07/07/2010 | CN201521280U Novel drill pipe valve |
| 07/07/2010 | CN201521279U Antifreeze sand control anti-disorder sampling valve for oil field well mouth |
| 07/07/2010 | CN201521255U Novel anti-splash joint |
| 07/07/2010 | CN201521254U Novel pullout blowout control joint |
| 07/07/2010 | CN101769140A Device for displacing oil underground, preventing reflow and automatically relieving pressure |
| 07/06/2010 | US7748463 Cementing valve |
| 07/06/2010 | US7748462 Actuating mechanism |