| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 05/28/2013 | US8448711 Pressure balanced drilling system and method using the same |
| 05/28/2013 | US8448709 Method of killing an uncontrolled oil-gas fountain appeared after an explosion of an offshore oil platform |
| 05/28/2013 | US8448700 Abrasive perforator with fluid bypass |
| 05/28/2013 | US8448659 Check valve assembly for well stimulation operations |
| 05/28/2013 | CA2683432C Flow-actuated pressure equalization valve for a downhole tool |
| 05/23/2013 | WO2013074248A1 Reactive choke for automatic wellbore fluid management and methods of using same |
| 05/23/2013 | WO2013074113A1 Autonomous fluid control system having a fluid diode |
| 05/23/2013 | WO2013074069A1 Preventing flow of undesired fluid through a variable flow resistance system in a well |
| 05/23/2013 | WO2013071688A1 Method of controlling out-of-control high-pressure oil well blowout |
| 05/23/2013 | WO2013049487A3 Apparatus and method for galvanically removing from or depositing onto a device a metallic material downhole |
| 05/23/2013 | WO2012173870A3 Apparatus and method for connecting fluid lines |
| 05/23/2013 | US20130126184 Reactive choke for automatic wellbore fluid management and methods of using same |
| 05/23/2013 | US20130126183 Product sampling system within subsea tree |
| 05/23/2013 | US20130126154 Safety valve with electrical actuator and tubing pressure balancing |
| 05/23/2013 | CA2855371A1 Preventing flow of undesired fluid through a variable flow resistance system in a well |
| 05/23/2013 | CA2854120A1 Reactive choke for automatic wellbore fluid management and methods of using same |
| 05/23/2013 | CA2844928A1 Autonomous fluid control system having a fluid diode |
| 05/22/2013 | EP2593638A1 Apparatuses and methods for closing and reopening a pipe |
| 05/22/2013 | CN202946127U Ball-pressurized fracturing device |
| 05/22/2013 | CN202946112U Switching device of fracturing sliding sleeve |
| 05/22/2013 | CN202946111U Throw-in type oil bleeder |
| 05/22/2013 | CN202946110U Subsurface safety valve |
| 05/22/2013 | CN202946109U Downhole oil and gas mouth |
| 05/22/2013 | CN202946108U 注气阀 Note valve |
| 05/22/2013 | CN103114843A Multi-layer multi-section continuous oil testing system without lifting tubular column and operation method thereof |
| 05/22/2013 | CN103114826A Manual operation pressure relief device |
| 05/22/2013 | CN102061904B Automatic grout valve of adjustable pressure difference type |
| 05/21/2013 | US8443901 Inflow control device and methods for using same |
| 05/21/2013 | US8443894 Anchor/shifting tool with sequential shift then release functionality |
| 05/16/2013 | WO2013071167A1 Containment system for oil field riser pipes |
| 05/16/2013 | WO2013070446A1 Completion method for stimulation of multiple intervals |
| 05/16/2013 | WO2013070445A1 Completion method for stimulation of multiple intervals |
| 05/16/2013 | WO2013070235A1 Autonomous fluid control assembly having a movable, density-driven diverter for directing fluid flow in a fluid control system |
| 05/16/2013 | WO2013070219A1 Rotational motion-inducing variable flow resistance systems having a sidewall fluid outlet and methods for use thereof in a subterranean formation |
| 05/16/2013 | WO2013070182A1 Fluid discrimination for use with a subterranean well |
| 05/16/2013 | WO2013070181A1 Variable flow resistance for use with a subterranean well |
| 05/16/2013 | WO2013068323A1 Valve for a hydrocarbon well, hydrocarbon well provided with such valve and use of such valve |
| 05/16/2013 | WO2012083047A3 Multi-zone fracturing completion |
| 05/16/2013 | US20130118758 Hydrostatic pressure independent actuators and methods |
| 05/16/2013 | US20130118732 Multi-actuating seat and drop element |
| 05/16/2013 | US20130118729 Preventing flow of undesired fluid through a variable flow resistance system in a well |
| 05/16/2013 | CA2854793A1 Completion method for stimulation of multiple intervals |
| 05/16/2013 | CA2853932A1 Completion method for stimulation of multiple intervals |
| 05/16/2013 | CA2853890A1 Valve for a hydrocarbon well, hydrocarbon well provided with such valve and use of such valve |
| 05/16/2013 | CA2852423A1 Rotational motion-inducing variable flow resistance systems having a sidewall fluid outlet and methods for use thereof in a subterranean formation |
| 05/16/2013 | CA2851561A1 Fluid discrimination for use with a subterranean well |
| 05/16/2013 | CA2851559A1 Variable flow resistance for use with a subterranean well |
| 05/16/2013 | CA2830959A1 Autonomous fluid control assembly having a movable, density-driven diverter for directing fluid flow in a fluid control system |
| 05/15/2013 | EP2592218A1 Valve assembly for a hydrocarbon wellbore, method of retro-fitting a valve assembly and sub-surface use of such valve assembly |
| 05/15/2013 | EP2591206A2 Dual-flow valve and swivel |
| 05/15/2013 | CN202937229U High-low voltage limit valve shielding device for wellhead control cabinet |
| 05/15/2013 | CN202937228U Sleeve high-pressure opening valve |
| 05/15/2013 | CN202937227U Drill-free type ball-throwing sliding sleeve |
| 05/15/2013 | CN202937226U Horizontal flow blanking plug |
| 05/15/2013 | CN103104217A Drilling following cable underground hydraulic control sleeving valve |
| 05/15/2013 | CN103104216A Air pressure self-balancing check valve |
| 05/15/2013 | CN101821474B Circulation control valve and associated method |
| 05/15/2013 | CN101413385B Well head safe hydraulic pressure cut-off apparatus |
| 05/15/2013 | CN101135238B Downhole dump valve and usage method |
| 05/14/2013 | US8439118 Pressure vortex device to allow flapper closure in high velocity fluid applications |
| 05/14/2013 | US8439117 Vortex controlled variable flow resistance device and related tools and methods |
| 05/14/2013 | CA2787510C Control valve assembly |
| 05/14/2013 | CA2706501C Mechanical actuator with electronic adjustment |
| 05/14/2013 | CA2700661C Gas lift valve |
| 05/10/2013 | WO2013066295A1 Autonomus fluid control device having a movable valve plate for downhole fluid selection |
| 05/10/2013 | WO2013066291A1 Autonomous fluid control device having a reciprocating valve for downhole fluid selection |
| 05/10/2013 | WO2013039663A3 Magnetically coupled safety valve with satellite inner magnets |
| 05/10/2013 | WO2013028402A3 Variable frequency fluid oscillators for use with a subterranean well |
| 05/10/2013 | WO2013028384A3 Surface controlled subsurface safety valve |
| 05/10/2013 | WO2012051705A9 Tools and methods for use in completion of a wellbore |
| 05/10/2013 | WO2012030843A8 Methods for completing multi-zone production wells using sliding sleeve valve assembly |
| 05/10/2013 | CA2854036A1 Well shut in device |
| 05/10/2013 | CA2848963A1 Autonomous fluid control device having a movable valve plate for downhole fluid selection |
| 05/10/2013 | CA2844638A1 Autonomous fluid control device having a reciprocating valve for downhole fluid selection |
| 05/09/2013 | US20130112436 Completion Method for Stimulation of Multiple Intervals |
| 05/09/2013 | US20130112435 Completion Method for Stimulation of Multiple Intervals |
| 05/09/2013 | US20130112426 Resettable pressure cycle-operated production valve and method |
| 05/09/2013 | US20130112425 Fluid discrimination for use with a subterranean well |
| 05/09/2013 | US20130112424 Fluid discrimination for use with a subterranean well |
| 05/09/2013 | US20130112423 Variable flow resistance for use with a subterranean well |
| 05/09/2013 | US20130112422 Differential pressure actuator |
| 05/09/2013 | US20130112401 Downhole electrical energy conversion and generation |
| 05/08/2013 | EP2588711A2 Flow control valve for polymer solutions |
| 05/08/2013 | CN202926289U Packer deblocking and decompressing switch |
| 05/08/2013 | CN202926288U Oil pumping well oil bleeder |
| 05/08/2013 | CN202926287U Pressure reducing valve for air drilling coring tool |
| 05/08/2013 | CN202926286U Well mouth safety valve switching device |
| 05/08/2013 | CN202926285U Anti-theft gate of oil delivery pipeline |
| 05/08/2013 | CN202926284U Novel throttle valve |
| 05/08/2013 | CN103097649A Series configured variable flow restrictors for use in a subtrerranean well? |
| 05/08/2013 | CN103097645A A safety mechanism for a well, a well comprising the safety mechanism, and related methods |
| 05/08/2013 | CN103089197A Sliding sleeve control tool |
| 05/08/2013 | CN102071908B Anti-blowout control valve |
| 05/07/2013 | US8434559 High strength dissolvable structures for use in a subterranean well |
| 05/02/2013 | WO2013062907A1 Safety valve control system and method of use |
| 05/02/2013 | WO2013062786A2 Gradational insertion of an artificial lift system into a live wellbore |
| 05/02/2013 | WO2013062566A1 Downhole packer assembly having a selective fluid bypass and method for use thereof |
| 05/02/2013 | WO2013060847A1 Inflow control device |
| 05/02/2013 | WO2013028456A3 Composite inflow control device |
| 05/02/2013 | WO2013025364A3 System for enabling selective opening of ports |