| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 12/18/2013 | CN203347742U Kelly bar self-restoration splash-proof device |
| 12/18/2013 | CN203347704U Well washing and oil draining device for pumping well |
| 12/18/2013 | CN103452527A Oil well perforated plate type throttle valve |
| 12/18/2013 | CN103104216B Air pressure self-balancing check valve |
| 12/18/2013 | CN102678080B Double-stage lifting oil-water well snubbing operation device |
| 12/18/2013 | CN102278091B Hydraulic sliding sleeve |
| 12/17/2013 | US8607882 Load balancing spherical diameter single seat ball system |
| 12/17/2013 | US8607880 Gas lift plunger acceleration arrangement |
| 12/17/2013 | US8607876 Flapper valve |
| 12/17/2013 | US8607874 Controlling flow between a wellbore and an earth formation |
| 12/17/2013 | US8607873 Flow controller device |
| 12/17/2013 | US8607872 Fire prevention blow-out valve |
| 12/17/2013 | US8607869 Linear pressure reducer for regulating injection pressure in an enhanced oil recovery system |
| 12/17/2013 | US8607811 Injection valve with indexing mechanism |
| 12/17/2013 | CA2657209C Method for flow control and autonomous valve or flow control device |
| 12/12/2013 | WO2013184432A1 Tubing test system |
| 12/12/2013 | WO2013184302A1 Wellbore isolation while placing valves on production |
| 12/12/2013 | WO2013184185A1 Methods of removing a wellbore isolation device using galvanic corrosion |
| 12/12/2013 | US20130327547 Aquifier flow controlling valve assembly and method |
| 12/12/2013 | US20130327539 Downhole valve |
| 12/12/2013 | US20130327538 Underbalance actuators and methods |
| 12/12/2013 | US20130327537 Flow control system with variable staged adjustable triggering device |
| 12/12/2013 | US20130327536 Rotational shear valve |
| 12/12/2013 | US20130327535 Subsea Overpressure Relief Device |
| 12/12/2013 | US20130327519 Tubing test system |
| 12/12/2013 | US20130327516 Actuation and Release Tool for Subterranean Tools |
| 12/11/2013 | EP2672059A1 Method and apparatus for controlling fluid flow using moveable flow diverter assembly |
| 12/11/2013 | EP2670945A2 Segmented collapsible ball seat allowing ball recovery |
| 12/11/2013 | EP2670944A2 Downhole pressure relief apparatus |
| 12/11/2013 | CN203335042U Electric submersible pump production tubular column with hydraulic control valve |
| 12/11/2013 | CN203335040U Movable casing gas recycling device |
| 12/11/2013 | CN203335031U Multilateral deep well emergency flow guide switch |
| 12/11/2013 | CN203335030U Automatic grout valve with supporting rod capable of being broken under tension |
| 12/11/2013 | CN203335029U Pressure transmission top-supported-type automatic grouting valve floating valve |
| 12/11/2013 | CN203335028U 弹簧式自动灌浆阀 Automatic filling valve spring |
| 12/11/2013 | CN203335027U Hydraulic control switch for adjusting water injection rate of oil-field water injection well |
| 12/11/2013 | CN203335026U Thermal recovery even thermal fluid injection valve |
| 12/11/2013 | CN203335025U Hydraulic ball valve special for water exploitation of coal mine shaft |
| 12/11/2013 | CN203335024U Novel pumping well check valve |
| 12/11/2013 | CN203335023U Return pressure reducing structure of heavy oil well |
| 12/11/2013 | CN203335022U Portable check valve |
| 12/11/2013 | CN203335021U Shear-pin-type automatic grouting valve |
| 12/11/2013 | CN103443396A Check valve assembly for well stimulation operations |
| 12/11/2013 | CN103443395A Autonomous valve |
| 12/11/2013 | CN103443394A Autonomous valve |
| 12/11/2013 | CN103443393A Remote subterranean tool activation system |
| 12/11/2013 | CN103437747A Horizontal well stage-unlimited sectional reconstruction method |
| 12/11/2013 | CN103437743A Shear-type pressure actuating mechanism used for pressure initiation device and reverse circulation valve |
| 12/10/2013 | US8602112 Control apparatus for downhole valves |
| 12/10/2013 | US8602111 Method and system for controlling a downhole flow control device |
| 12/10/2013 | US8602108 Subsea tree safety control system |
| 12/10/2013 | US8602107 Downhole hydraulic control line |
| 12/10/2013 | US8602105 Actuator device for downhole tools |
| 12/10/2013 | US8602104 Bi-stable valve |
| 12/10/2013 | CA2734813C Fracture valve and equalizer system and method |
| 12/10/2013 | CA2700320C Flow restriction device |
| 12/10/2013 | CA2691925C Valve for controlling the flow of fluid between an interior region of the valve and an exterior region of the valve |
| 12/10/2013 | CA2502598C Openhole perforating |
| 12/05/2013 | WO2013180898A1 Materials with environmental degradability, methods of use and making |
| 12/05/2013 | WO2013180706A1 Auto-filling of a tubular string in a subterranean well |
| 12/05/2013 | WO2013064658A3 Well shut in device |
| 12/05/2013 | WO2013014439A3 Ball valve |
| 12/05/2013 | WO2013014438A3 Valve |
| 12/05/2013 | US20130319695 Downhole isolation tool having a ported sliding sleeve |
| 12/05/2013 | US20130319694 Downhole ported shifting sleeve |
| 12/05/2013 | US20130319687 Apparatus Configuration Downhole |
| 12/05/2013 | US20130319679 Downhole deployment valves |
| 12/05/2013 | US20130319678 Multi-function surge reduction apparatus |
| 12/05/2013 | US20130319658 Wellbore isolation while placing valves on production |
| 12/04/2013 | EP2669468A1 Method of and apparatus for completing a well |
| 12/04/2013 | EP2669466A2 Inflow control device having externally configurable flow ports |
| 12/04/2013 | CN203321478U Switch fracturing slide bush |
| 12/04/2013 | CN203321441U Sheet sealing pressure difference type oil drainage device |
| 12/04/2013 | CN203321440U Underground casing pressure vent valve of heavy oil well |
| 12/04/2013 | CN203321439U Downhole stable-pressure release valve for heavy oil well |
| 12/04/2013 | CN203321438U Constant-pressure valve for down-hole operation in oil and gas fields |
| 12/04/2013 | CN203321437U Novel antitheft sampling valve |
| 12/04/2013 | CN203321436U Guide cock valve |
| 12/04/2013 | CN203321435U Dual-tube thermal-recovery wellhead device |
| 12/04/2013 | CN203321434U Safety device for Christmas tree rubber gate |
| 12/04/2013 | CN203321433U Special tool for gas production tree valve governance |
| 12/04/2013 | CN203321432U Underwater vertical type Christmas tree valve set |
| 12/04/2013 | CN203321418U Near-bit downhole blowout preventer |
| 12/04/2013 | CN103429843A Flow control screen assembly having remotely disabled reverse flow control capability |
| 12/04/2013 | CN103422845A Y-type reducing dual-channel high-pressure acidizing and fracturing well head device |
| 12/04/2013 | CN103422830A Circulation killing sleeve perforator |
| 12/03/2013 | US8596368 Resettable pressure cycle-operated production valve and method |
| 12/03/2013 | US8596366 Wellbore flow control devices comprising coupled flow regulating assemblies and methods for use thereof |
| 12/03/2013 | US8596365 Resettable pressure cycle-operated production valve and method |
| 12/03/2013 | CA2751320C Stage cementing tool |
| 11/30/2013 | CA2816646A1 Inflow control device having externally configurable flow ports |
| 11/30/2013 | CA2802211A1 Improved downhole isolation tool having a ported sliding sleeve |
| 11/28/2013 | WO2013177212A1 Safety valve control system and method of use |
| 11/28/2013 | US20130312965 Kobe sub, wellbore tubing string apparatus and method |
| 11/28/2013 | US20130312964 Kobe sub, wellbore tubing string apparatus and method |
| 11/27/2013 | EP2665894A2 Telemetry operated circulation sub |
| 11/27/2013 | CN203308446U Multi-stage fracturing sliding sleeve free from opening in midway |
| 11/27/2013 | CN203308443U Circulating gas injection pipe column |
| 11/27/2013 | CN203308434U Built-in anti-freezing anti-theft sampler |
| 11/27/2013 | CN203308433U Ball screw gate valve |