| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 01/08/2014 | CN203383782U Inner sleeve pressure relief screwed plug in pit |
| 01/08/2014 | CN203383781U Plug valve of oil pipe |
| 01/08/2014 | CN203383780U Integral type oil extraction wellhead device |
| 01/08/2014 | CN203383772U Packer with safety valve |
| 01/08/2014 | CN203383744U One-way check drill rod for coal mine |
| 01/08/2014 | CN103502567A A device for directing the flow of a fluid using a centrifugal switch |
| 01/08/2014 | CN103498656A Tongue-and-groove type multi-layer fracturing pipe column with equal drift diameters |
| 01/08/2014 | CN103498645A 低剪切调节阀 Low shear valve |
| 01/08/2014 | CN101675210B Rupture disc assembly that withstands much higher back pressures than actuation pressure |
| 01/07/2014 | US8622139 Emergency subsea wellhead closure devices |
| 01/07/2014 | US8622138 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
| 01/07/2014 | US8621958 Drive device |
| 01/03/2014 | WO2014004561A2 Method and apparatus for injecting gas into a reservoir |
| 01/03/2014 | WO2014004144A2 System and method for servicing a wellbore |
| 01/03/2014 | WO2014004143A1 Actuating device and method |
| 01/03/2014 | WO2014004125A1 Device having a hard seat support |
| 01/03/2014 | WO2014003911A1 Redundant actuation system |
| 01/03/2014 | WO2014003754A1 Well clean-up with subsea separator |
| 01/03/2014 | WO2014003731A1 Safety valve with independent flow tube |
| 01/03/2014 | WO2014000777A1 Remote and manually actuated well tool |
| 01/03/2014 | CA2877468A1 System and method for servicing a wellbore |
| 01/03/2014 | CA2877309A1 Remote and manually actuated well tool |
| 01/02/2014 | US20140000909 System and Method for Servicing a Wellbore |
| 01/02/2014 | US20140000908 Actuating device and method |
| 01/02/2014 | US20140000907 Apparatus and method for backseating a gate valve |
| 01/02/2014 | US20140000906 Liner flotation system |
| 01/02/2014 | US20140000905 Method and apparatus for injecting gas into a reservoir |
| 01/02/2014 | US20140000903 Ball valve assembly |
| 01/02/2014 | US20140000870 Safety Valve With Independent Flow Tube |
| 01/01/2014 | EP2679764A1 A Well comprising a Safety Mechanism and Sensors |
| 01/01/2014 | EP2679763A1 Well |
| 01/01/2014 | EP2679762A1 Casing Valve |
| 01/01/2014 | CN203374245U Tubing drain |
| 01/01/2014 | CN203374244U Inner cage valve sleeve type throttle valve |
| 01/01/2014 | CN203374243U Outer cage throttle valve |
| 01/01/2014 | CN203374242U Annular self heat preserving well mouth combination device |
| 01/01/2014 | CN203374241U Sleeve pipe constant pressure deflation valve |
| 01/01/2014 | CN203374240U Constant-pressure blow-off and heat preservation device for oil well casing |
| 01/01/2014 | CN203374239U Pressure-relievable check valve |
| 01/01/2014 | CN103492671A Method and apparatus for controlling fluid flow in an autonomous valve using a sticky switch |
| 01/01/2014 | CN103492670A Apparatus and method for increasing the ultimate recovery of natural gas contained in shale and other tight gas reservoirs |
| 01/01/2014 | CN103485774A Self-sealing anti-theft sampling valve of oil well |
| 01/01/2014 | CN103485743A Oil layer leak-proof device |
| 12/31/2013 | US8616291 Fail safe regulator for deep-set safety valve having dual control lines |
| 12/31/2013 | US8616290 Method and apparatus for controlling fluid flow using movable flow diverter assembly |
| 12/31/2013 | US8616289 Back pressure valve |
| 12/31/2013 | US8616285 Step ratchet fracture window system |
| 12/31/2013 | CA2743381C Apparatus and method for servicing a wellbore |
| 12/31/2013 | CA2639341C Downhole sliding sleeve combination tool |
| 12/29/2013 | CA2819808A1 Downhole shut-in device for pressure variation testing in gas lift wells |
| 12/27/2013 | CA2814893A1 Hydraulic pulse valve with improved pulse control |
| 12/26/2013 | US20130341539 Valve apparatus |
| 12/26/2013 | US20130341050 Device having a hard seat support |
| 12/26/2013 | US20130341035 Method and Apparatus for Remotely Changing Flow Profile in Conduit and Drilling Bit |
| 12/26/2013 | US20130341034 Flapper retention devices and methods |
| 12/26/2013 | CA2820777A1 Two-step hydraulic valve |
| 12/25/2013 | EP2675994A1 Autonomous fluid control assembly having a movable, density-driven diverter for directing fluid flow in a fluid control system |
| 12/25/2013 | CN203362142U Actuating and differential pressure type fracturing sliding sleeve |
| 12/25/2013 | CN203362138U Watering flow regulating and controlling valve |
| 12/25/2013 | CN203362137U High-pressure controllable water injection device |
| 12/25/2013 | CN203362115U Double-direction starting type sliding sleeve on-off tool |
| 12/25/2013 | CN203362114U Down hole differential pressure type openable and closeable circulating valve |
| 12/25/2013 | CN203362113U Arrow-shaped check valve |
| 12/25/2013 | CN203362112U Full-bore-type voltage-controlled underground well opening valve |
| 12/25/2013 | CN203362111U Sleeving-pressing type anti-freezing anti-theft device for oil well valve |
| 12/25/2013 | CN203362110U Novel anti-theft oil well sampling device |
| 12/25/2013 | CN203362109U Faucet used for oil field workover |
| 12/25/2013 | CN203362108U Vent valve for gas recovery well mouth |
| 12/25/2013 | CN203362100U Wellhead oil-gas mixing transportation device |
| 12/25/2013 | CN103477028A A method for indivdually servicing a plurality of zones of a subterranean formation |
| 12/25/2013 | CN103477026A Wellbore injection system |
| 12/25/2013 | CN103470229A Sand protection matching pipe string for high-throughput sand filter pipe |
| 12/25/2013 | CN103470218A Novel low-pressure triggering pressure lever instability shut-off valve |
| 12/25/2013 | CN103470217A Low-voltage triggering type compression bar unstability wellhead shutdown valve |
| 12/25/2013 | CN103470216A Novel compression bar buckling triggering type wellhead shut-off valve |
| 12/25/2013 | CN103470215A Compression bar buckling triggering type wellhead safety valve |
| 12/25/2013 | CN102226391B Anti-erosion system based on hydraulic jet fracturing anti-vortex erosion valve |
| 12/25/2013 | CA2820491A1 System, method and apparatus for controlling fluid flow through drill string |
| 12/19/2013 | WO2013188143A1 Elastically responsive unibody shear valve |
| 12/19/2013 | WO2013187943A1 Methods of removing a wellbore isolation device using a eutectic composition |
| 12/19/2013 | WO2013185227A1 Rotating flow control diverter having dual stripper elements |
| 12/19/2013 | WO2013062786A3 Gradational insertion of an artificial lift system into a live wellbore |
| 12/19/2013 | WO2013040298A3 Self-controlled inflow control device |
| 12/19/2013 | WO2013039943A3 Method and apparatus for unplugging hydrocarbon drains or vents |
| 12/19/2013 | US20130333898 Elastically responsive unibody shear valve |
| 12/19/2013 | US20130333894 Subsea actuation system |
| 12/19/2013 | US20130333891 Wellbore isolation device containing a substance that undergoes a phase transition |
| 12/19/2013 | US20130333887 Washpipe isolation valve and associated systems and methods |
| 12/19/2013 | CA2876067A1 Rotating flow control diverter having dual stripper elements |
| 12/18/2013 | EP2673463A2 System and method for servicing a wellbore |
| 12/18/2013 | EP2673462A2 A METHOD FOR INDIViDUALLY SERVICING A PLURALITY OF ZONES OF A SUBTERRANEAN FORMATION |
| 12/18/2013 | EP2673461A1 Wellbore injection system |
| 12/18/2013 | EP2536917B1 Valve system |
| 12/18/2013 | EP2255064B1 Multi-cycle single line switch |
| 12/18/2013 | EP2221450B1 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
| 12/18/2013 | CN203348702U Oil-water well mouth valve opening and closing device |
| 12/18/2013 | CN203347771U Fracture sliding sleeve capable of being opened and closed repeatedly |
| 12/18/2013 | CN203347745U Self-sealing well washing device |
| 12/18/2013 | CN203347744U Oil well gate protection device |
| 12/18/2013 | CN203347743U Novel check valve of oil pumping well |