| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 04/08/2009 | CN201218081Y Casing tube constant pressure deflation valve |
| 04/07/2009 | US7513311 Temporary well zone isolation |
| 04/07/2009 | US7513301 Liquid aeration plunger |
| 04/07/2009 | CA2590594C Method and apparatus for fluid bypass of a well tool |
| 04/07/2009 | CA2445870C Automatic tubing filler |
| 04/07/2009 | CA2383370C Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
| 04/07/2009 | CA2259883C Sealing assembly and method |
| 04/02/2009 | WO2009042391A1 Flow control systems and methods |
| 04/02/2009 | WO2009041823A1 Activating mechanism |
| 04/02/2009 | WO2009040518A1 Choke assembly |
| 04/02/2009 | US20090084556 Apparatus for adjustably controlling the inflow of production fluids from a subterranean well |
| 04/02/2009 | US20090084555 Novel activating mechanism for controlling the operation of a downhole tool |
| 04/02/2009 | US20090084553 Sliding sleeve valve assembly with sand screen |
| 04/01/2009 | EP2042685A1 Choke assembly |
| 04/01/2009 | EP2041392A1 Sealing device |
| 04/01/2009 | EP2041391A1 A regulating device and methods of using same |
| 04/01/2009 | CN201215003Y Sucker rod controlled three-layer wheel pumping water finding switch |
| 04/01/2009 | CN201215001Y Heating and insulating device for manifold valve of petroleum well drilling wellhead |
| 04/01/2009 | CN201215000Y Choke manifold filter valve |
| 04/01/2009 | CN201214227Y Tool special for mounting valve body rubber ring of cementing truck plunger pump |
| 04/01/2009 | CN101397897A Oil production wellhead stop valve |
| 03/31/2009 | US7510018 Convertible seal |
| 03/31/2009 | US7510013 Hydraulic metering valve for operation of downhole tools |
| 03/31/2009 | US7510010 System and method for cementing through a safety valve |
| 03/31/2009 | US7510001 Downhole actuation tools |
| 03/26/2009 | WO2009038999A1 Annular pressure monitoring during hydraulic fracturing |
| 03/26/2009 | WO2009038997A2 Tubing retrievable injection valve |
| 03/26/2009 | WO2009038467A2 Shear open valve |
| 03/26/2009 | US20090078428 Flow control systems and methods |
| 03/26/2009 | US20090078423 Distortion Compensation for Rod Piston Bore in Subsurface Safety Valves |
| 03/26/2009 | CA2699112A1 Shear open valve |
| 03/25/2009 | EP2039969A1 A milti-way valve with fan-shape passage sealing pairs |
| 03/25/2009 | EP2039879A2 Apparatus and methods for running liners |
| 03/25/2009 | EP1721058B1 Connection system for subsea flow interface equipment |
| 03/25/2009 | CN201212376Y Injection well pipe column pressure release valve |
| 03/25/2009 | CN201212375Y Check valve |
| 03/25/2009 | CN101392637A Pull-discharging general-purpose drip |
| 03/24/2009 | CA2398289C Choke inductor for wireless communication and control in a well |
| 03/19/2009 | WO2009035923A2 Multi-function indicating tool |
| 03/19/2009 | WO2009035917A2 Method and apparatus for multi-positioning a sleeve |
| 03/19/2009 | WO2009035837A1 Downhole valve for preventing zonal cross-flow |
| 03/19/2009 | WO2009035455A1 Pressure compensator for drill bit |
| 03/19/2009 | US20090071658 Valve |
| 03/19/2009 | US20090071657 Annular Pressure Monitoring During Hydraulic Fracturing |
| 03/19/2009 | US20090071655 Method and Apparatus for Multi-Positioning a Sleeve |
| 03/19/2009 | US20090071654 Tubing Retrievable Injection Valve |
| 03/19/2009 | US20090071643 Downhole valve for preventing zonal cross-flow |
| 03/19/2009 | CA2712596A1 Pressure compensator for drill bit |
| 03/19/2009 | CA2698948A1 Multi-function indicating tool |
| 03/18/2009 | EP2035655A1 Hydraulic metering valve for operation of downhole tools |
| 03/18/2009 | EP2035654A2 Wellbore valve having linear magnetically geared valve actuator |
| 03/18/2009 | CN201209436Y Directional flow packer |
| 03/18/2009 | CN201209428Y Work regulating and controlling linkage drip |
| 03/18/2009 | CN201209427Y Temporary blocking single flow valve |
| 03/18/2009 | CN201209426Y Layered acidizing switch |
| 03/18/2009 | CN201209425Y Anti-theft device for wellhead gate valve |
| 03/18/2009 | CN201209424Y Flow control valve |
| 03/18/2009 | CN201209417Y Concentric double tube zonal injection wellhead device |
| 03/17/2009 | US7503399 Casing shoes and methods of reverse-circulation cementing of casing |
| 03/17/2009 | US7503398 Methods and apparatus for actuating a downhole tool |
| 03/17/2009 | US7503392 Deformable ball seat |
| 03/17/2009 | US7503390 Lock mechanism for a sliding sleeve |
| 03/17/2009 | US7503385 Single line control module for well tool actuation |
| 03/17/2009 | CA2639556A1 A system for completing water injector wells |
| 03/12/2009 | WO2009033018A1 Lubricator valve |
| 03/12/2009 | WO2009032889A1 Method and system for controlling a well service rig based on load data |
| 03/12/2009 | WO2009009336A3 Producing resources using heated fluid injection |
| 03/12/2009 | WO2008155526A3 Improved activation device |
| 03/12/2009 | US20090065257 Apparatus and methods for utilizing a downhole deployment valve |
| 03/12/2009 | US20090065218 Downhole hydraulic valve systems |
| 03/12/2009 | US20090065217 Step ratchet mechanism |
| 03/12/2009 | US20090065216 Degradable Downhole Check Valve |
| 03/12/2009 | US20090065214 Apparatus for controlling a downhole device |
| 03/12/2009 | US20090065213 Downhole valve assembly, actuation device for a downhole valve assembly and method of controlling fluid flow downhole |
| 03/12/2009 | US20090065212 Lubricator valve |
| 03/12/2009 | US20090065199 Retrievable Inflow Control Device |
| 03/12/2009 | CA2618433A1 Cyclonic, debris removing valve and method |
| 03/11/2009 | EP2032798A2 Wireline slip hanging bypass assembly and method |
| 03/11/2009 | CN201206458Y Controllable switch hole sliding bush assembly |
| 03/11/2009 | CN201206457Y Flow dividing valve |
| 03/11/2009 | CN201206451Y Double tube valves of oil production process flow |
| 03/11/2009 | CN201206450Y Antifreezing and collection transmitting process device of oil production well special for oilfield |
| 03/11/2009 | CN101384793A Pressure monitoring of control lines for tool position feedback |
| 03/11/2009 | CN101382055A Spiral type push rod oil drainage method under pump and device thereof |
| 03/11/2009 | CN101382054A Lubricator valve |
| 03/10/2009 | US7500526 Downhole tool |
| 03/10/2009 | US7500524 Well operations systems |
| 03/10/2009 | US7500523 Valve for controlling the flow of fluid between an interior region of the valve and an exterior region of the valve |
| 03/10/2009 | US7500516 System, method, and apparatus for accessing outlets in a two-stage diverter spool assembly |
| 03/10/2009 | CA2496956C Reverse circulation drilling blowout preventor |
| 03/07/2009 | CA2639342A1 Degradable downhole check valve |
| 03/07/2009 | CA2639341A1 Downhole sliding sleeve combination tool |
| 03/05/2009 | WO2009029146A1 Bearing assembly system with integral lubricant distribution and well drilling equipment comprising same |
| 03/05/2009 | WO2008118916A4 Subsurface safety valve with metal seal |
| 03/05/2009 | US20090056954 High angle water flood kickover tool |
| 03/05/2009 | US20090056952 Downhole Tool |
| 03/05/2009 | US20090056951 Fluid loss control flapper valve |
| 03/05/2009 | US20090056948 Safety Valve |
| 03/05/2009 | US20090056937 High angle water flood kickover tool |
| 03/04/2009 | EP1825176B1 Axially energisable ball valve |