| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
|---|
| 01/21/2009 | CN201184167Y Inverse well-flushing valve |
| 01/21/2009 | CN101349148A Double-feedback fluid-control one-way throttle velocity modulation composite valve |
| 01/21/2009 | CN101349146A Deep water hurricane-proof valve |
| 01/15/2009 | WO2009009336A2 Producing resources using heated fluid injection |
| 01/15/2009 | WO2009009281A2 Incremental annular choke |
| 01/15/2009 | WO2008143784A3 Apparatus for autonomously controlling the inflow of production fluids from a subterranean well |
| 01/15/2009 | US20090014185 Incremental annular choke |
| 01/15/2009 | US20090014183 Injection valve and method |
| 01/15/2009 | US20090014168 Casing valves system for selective well stimulation and control |
| 01/15/2009 | US20090014071 Mud saver valve with magnetic latching |
| 01/15/2009 | CA2692686A1 Producing resources using heated fluid injection |
| 01/14/2009 | CN201180541Y Anti-emptying anti-theft sampling valve for oil well |
| 01/14/2009 | CN201180526Y Sand shovel for horizontal well sand pumping pump |
| 01/14/2009 | CN201180518Y Circulating cut-off valve apparatus |
| 01/13/2009 | US7475733 Communication tool for accessing a non annular hydraulic chamber of a subsurface safety valve |
| 01/13/2009 | US7475732 Instrumentation for a downhole deployment valve |
| 01/08/2009 | WO2009004431A1 Sub sea actuator |
| 01/08/2009 | US20090008102 Isolation Valve for Subsurface Safety Valve Line |
| 01/08/2009 | US20090008098 Method and apparatus for catching a pump-down plug or ball |
| 01/08/2009 | US20090008097 Externally energized constant-thrust device |
| 01/08/2009 | US20090008083 Method and apparatus for wellbore fluid treatment |
| 01/08/2009 | US20090008078 Flow control assembly having a fixed flow control device and an adjustable flow control device |
| 01/07/2009 | CN201177096Y Theft-proof device for sluice |
| 01/07/2009 | CN201176863Y Pressure and flow controlled gas recovery well head safety closing device |
| 01/07/2009 | CN101338657A Hydraulically controlled underbalance downhole casing valve |
| 01/07/2009 | CN100449112C Automatic safety switch for oil and gas well |
| 01/06/2009 | US7472756 Valve apparatus with seal assembly |
| 01/06/2009 | CA2513240C Well fluid control |
| 01/06/2009 | CA2426306C Gas displaced chamber lift system with closed loop/multi-stage vents |
| 01/01/2009 | US20090000793 Methods and apparatus for well construction |
| 12/31/2008 | WO2008134311B1 Restrictor valve mounting for downhole screens |
| 12/31/2008 | WO2008134311A4 Restrictor valve mounting for downhole screens |
| 12/31/2008 | EP2007967A2 A system and method for estimating supercharge pressure and initial pressure of a formation |
| 12/31/2008 | CN101333920A Inflow control device |
| 12/30/2008 | US7469877 Throttle device |
| 12/30/2008 | US7469744 Deformable ball seat and method |
| 12/26/2008 | CA2635816A1 Downhole linear actuation apparatus and method |
| 12/25/2008 | US20080315582 High Pressure Energizable Tube Connector for a Well and Method of Energizing the Connector |
| 12/25/2008 | US20080314599 Tubing Pressure Balanced Operating System with Low Operating Pressure |
| 12/25/2008 | US20080314596 Apparatus and method for wellbore isolation |
| 12/25/2008 | US20080314590 Inflow control device |
| 12/25/2008 | US20080314589 System and method for creating a gravel pack |
| 12/24/2008 | WO2008157765A1 Inflow control device |
| 12/24/2008 | WO2008156369A1 Sleeve valve |
| 12/24/2008 | WO2008155526A2 Improved activation device |
| 12/24/2008 | WO2008118916A3 Subsurface safety valve with metal seal |
| 12/24/2008 | CN201170083Y Reducing sliding bush |
| 12/24/2008 | CN201170082Y Christmas tree shutter hand wheel anti-theft fixing device |
| 12/24/2008 | CN201170079Y Shutter shaft seal flow leakage valve |
| 12/24/2008 | CA2692230A1 Improved activation device |
| 12/24/2008 | CA2692150A1 Inflow control device |
| 12/24/2008 | CA2690341A1 Sleeve valve |
| 12/23/2008 | US7467664 Production actuated mud flow back valve |
| 12/23/2008 | US7467658 Down hole drilling fluid heating apparatus and method |
| 12/23/2008 | CA2525065C Wellbores utilizing fiber optic-based sensors and operating devices |
| 12/18/2008 | WO2008154184A2 Removable injection or production flow equalization valve |
| 12/18/2008 | WO2008153698A1 Hydraulic pump-drive downhole fluids pump with linear driver |
| 12/18/2008 | WO2008153644A1 Apparatus for controlling the inflow of production fluids from a subterranean well |
| 12/18/2008 | WO2008130852A3 Christmas tree with internally positioned flowmeter |
| 12/18/2008 | WO2008106639A3 Improved system and method for stimulating multiple production zones in a wellbore |
| 12/18/2008 | US20080308268 Method and Apparatus to Hydraulically Bypass a Well Tool |
| 12/17/2008 | EP2002081A2 Downhole tool with c-ring closure seat |
| 12/17/2008 | CN201166172Y Ultra-decompression pilot valve for petroleum natural gas well head safe cut-off control |
| 12/17/2008 | CN201165862Y Hydraulic control oil field downhole multi-time opening-closing valve and opening-closing tools |
| 12/17/2008 | CN201165861Y Oil field downhole fluid control valve and opening-closing tools |
| 12/17/2008 | CN101324275A Compensation type double-seal adjusting valve |
| 12/17/2008 | CN101324180A Underwater hydraulic reversing valve |
| 12/17/2008 | CN101324179A Underwater electrohydraulic control valve |
| 12/16/2008 | US7464761 Flow control system for use in a well |
| 12/11/2008 | WO2007018877A3 Downhole uses of electroactive polymers |
| 12/11/2008 | US20080302538 Cemented Open Hole Selective Fracing System |
| 12/11/2008 | US20080302534 Full bore lined wellbores |
| 12/11/2008 | US20080302533 Removable Injection or Production Flow Equalization Valve |
| 12/11/2008 | US20080302524 Apparatus for wellbore communication |
| 12/10/2008 | CN201162878Y High pressure self-control valve |
| 12/10/2008 | CN201162524Y Sand-proof draining protection apparatus |
| 12/10/2008 | CN201162523Y Multifunctional hydraulic anchorage draining apparatus |
| 12/10/2008 | CN201162522Y Surface safety valve control system for petroleum natural gas extraction and transmission operation |
| 12/09/2008 | US7461698 Remotely operable top drive system safety valve having dual valve elements |
| 12/09/2008 | CA2458831C Method and system for determining and controlling position of a valve |
| 12/04/2008 | WO2008146012A2 Downhole apparatus |
| 12/04/2008 | WO2008070271A3 System and method for facilitating downhole operations |
| 12/04/2008 | WO2007123909A3 Downhole flow control apparatus, operable via surface applied pressure |
| 12/03/2008 | CN201159076Y Intelligent flux observing and controlling device |
| 12/03/2008 | CN201159066Y Induced flow test valve for high pressure oil gas well |
| 12/03/2008 | CN201159065Y Blowout prevention air deflector |
| 12/02/2008 | US7460438 Downhole data communication |
| 11/27/2008 | WO2008143784A2 Apparatus for autonomously controlling the inflow of production fluids from a subterranean well |
| 11/27/2008 | WO2008143522A1 Gas valve and production tubing with a gas valve |
| 11/27/2008 | WO2008142409A1 Downhole flow control tool and method |
| 11/27/2008 | WO2007149795A3 Wellbore valve having linear magnetically geared valve actuator |
| 11/27/2008 | US20080289878 Downhole blowout preventor |
| 11/27/2008 | CA2686270A1 Method and apparatus for dropping a pump down plug or ball |
| 11/27/2008 | CA2685946A1 Gas valve and production tubing with a gas valve |
| 11/26/2008 | CN201155322Y By-pass valve |
| 11/26/2008 | CN201155321Y Arrow type float-valve |
| 11/26/2008 | CN100436904C Valve system and method |
| 11/25/2008 | US7455116 Injection valve and method |
| 11/25/2008 | US7455115 Flow control device |
| 11/25/2008 | US7455114 Snorkel device for flow control |