Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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11/16/2011 | CN202039813U Needle valve |
11/16/2011 | CN202039769U Crushing mechanism with air inlet pipe |
11/16/2011 | CN102242621A Negative pressure de-plugging and oil extraction process and device |
11/16/2011 | CN102242617A Pressure sensing valve |
11/16/2011 | CN102242615A 钻孔瓦斯防喷装置 Gas drilling blowout preventer |
11/15/2011 | US8056643 Systems and techniques to actuate isolation valves |
11/15/2011 | US8056637 Subsurface safety valve and method for chemical injection into a wellbore |
11/15/2011 | US8056628 System and method for facilitating downhole operations |
11/15/2011 | US8056618 Flapper mounted equalizer valve for subsurface safety valves |
11/15/2011 | CA2671282C Controlling transient pressure conditions in a wellbore |
11/15/2011 | CA2655501C Wireline slip hanging bypass assembly and method |
11/10/2011 | WO2011106614A3 Mechanical lock with pressure balanced floating piston |
11/10/2011 | US20110272163 Wellhead Downhole Line Communication Arrangement |
11/09/2011 | EP2385212A1 Choke assembly |
11/09/2011 | CN202031599U Hydraulic drilling machine |
11/09/2011 | CN202031547U Wellhead hydraulic signal generating device |
11/09/2011 | CN202031540U Intelligent Control device of oilfield water injection valve |
11/09/2011 | CN202031539U Pressure control device for high-sulfur content gas well |
11/09/2011 | CN202031538U Unloading high-pressure anti-explosion solenoid valve |
11/09/2011 | CN202031537U Quick release valve for well-mouth pneumatic safety valve |
11/09/2011 | CN202031536U Novel control system of well-mouth safety valve |
11/09/2011 | CN202031533U Shunting-type grouting plugging device for gas extraction center |
11/09/2011 | CN202031527U Pressing crack packer of barefoot well |
11/08/2011 | CA2546335C Gravel pack crossover tool with single position multi-function capability |
11/03/2011 | WO2011137112A2 Downhole barrier device |
11/03/2011 | WO2011091140A3 Ball drop module |
11/03/2011 | WO2011087673A3 Wireline-adjustable downhole flow control devices and methods for using same |
11/03/2011 | WO2011071906A3 Multi-component disappearing tripping ball and method for making the same |
11/03/2011 | WO2011049970A4 Pressure equalizing a ball valve through an upper seal bypass |
11/03/2011 | US20110266001 Method and apparatus for controlling fluid flow using movable flow diverter assembly |
11/02/2011 | EP2383430A2 Method and apparatus for controlling fluid flow using moveable flow diverter assembly |
11/02/2011 | EP2382367A2 Expandable stabilizer with roller reamer elements |
11/02/2011 | CN202023535U Hydraulic-control repeated on-off valve and locating instrument of same |
11/02/2011 | CN202023534U Double-prevention check valve |
11/02/2011 | CN202023533U Antitheft valve for oil pumping unit |
11/02/2011 | CN202023531U Large-size float shoe used for expandable casing pipe with constant well-diameter |
11/02/2011 | CN202023523U Operation-under-pressure device for two-stage elevating oil-water well |
11/02/2011 | CN102232139A Wellhead valve system for adjusting the flow with integrated multiphase flow rate measuring ability |
11/01/2011 | US8047304 Expandable reamer for subterranean boreholes and methods of use |
11/01/2011 | US8047294 Dual flapper safety valve |
11/01/2011 | US8047293 Flow-actuated actuator and method |
11/01/2011 | CA2693676C Downhole tool assembly with debris relief, and method for using same |
11/01/2011 | CA2671374C Controlling transient pressure conditions in a wellbore |
11/01/2011 | CA2564598C Plug setting and retrieving apparatus |
11/01/2011 | CA2493267C Fluid system component with sacrificial element |
10/29/2011 | CA2813763A1 Method and apparatus for controlling fluid flow using movable flow diverter assembly |
10/29/2011 | CA2737998A1 Method and apparatus for controlling fluid flow using movable flow diverter assembly |
10/27/2011 | WO2011133810A2 High pressure and high temperature ball seat |
10/27/2011 | WO2011130846A1 Method and apparatus for wellbore control |
10/27/2011 | WO2011109616A3 Flow control arrangement and method |
10/27/2011 | US20110259610 High pressure and high temperature ball seat |
10/27/2011 | US20110259600 Electromechanical actuator apparatus and method for down-hole tools |
10/27/2011 | US20110259595 Mechanical Sliding Sleeve |
10/27/2011 | US20110259582 Fluid system component with sacrificial element |
10/27/2011 | US20110259575 Injection of liquid into boreholes, with suckback pulsing |
10/27/2011 | DE10125369B4 Hydraulische Unterwasserkupplung mit Führung für ein Ventilstellglied Hydraulic coupling with guide for a valve actuator |
10/27/2011 | CA2795798A1 High pressure and high temperature ball seat |
10/27/2011 | CA2795199A1 Method and apparatus for wellbore control |
10/26/2011 | CN202017476U Novel anti-spray oil drain device |
10/26/2011 | CN202017475U Closed type cut-off device |
10/26/2011 | CN202017474U Constant current control device |
10/26/2011 | CN102226391A Anti-erosion system based on hydraulic jet fracturing anti-vortex erosion valve |
10/26/2011 | CN102226390A Testing device for deep wells and high-temperature and high-pressure wells |
10/23/2011 | CA2848473A1 Valve with shuttle |
10/23/2011 | CA2848469A1 Valve with shuttle |
10/23/2011 | CA2738107A1 Valve with shuttle |
10/20/2011 | WO2011130505A2 Apparatus and method for selective flow control |
10/20/2011 | WO2011129704A2 Variable orifice device |
10/20/2011 | WO2011059845A3 Modular hydraulic operator for a subterranean tool |
10/20/2011 | US20110253392 System and method for controlling flow in a wellbore |
10/20/2011 | US20110253383 System and method for servicing a wellbore |
10/20/2011 | US20110253380 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
10/20/2011 | US20110253379 Method for modifying an existing subsea arranged oil production well, and a thus modified oil production well |
10/20/2011 | US20110253378 Subsea wellhead providing controlled access to a casing annulus |
10/19/2011 | EP2378057A2 Sand control screen assembly having remotely disabled reverse flow control capability |
10/19/2011 | CN202012646U Safety valve |
10/19/2011 | CN202012330U Wellhead safety hydraulic intercepting control system |
10/19/2011 | CN202012329U Mud anti-splashing valve for kelly bar |
10/19/2011 | CN202012316U Supporting device for replacing valve |
10/19/2011 | CN102220851A Wellhead moving anti-theft device |
10/18/2011 | US8037940 Method of completing a well using a retrievable inflow control device |
10/18/2011 | CA2662467C Well cementing using a sleeve shifter actuated valve |
10/18/2011 | CA2654783C Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
10/18/2011 | CA2651083C Plunger lift system for well |
10/18/2011 | CA2637326C Positional control of downhole actuators |
10/18/2011 | CA2493210C Method and apparatus to selectively reduce wellbore pressure during pumping operations |
10/13/2011 | WO2011127411A2 Fluid displacement methods and apparatus for hydrocarbons in subsea production tubing |
10/13/2011 | WO2011126669A1 Subterranean well valve activated with differential pressure |
10/13/2011 | WO2011126633A1 Shunt isolation valve |
10/13/2011 | WO2011126378A1 Device for electromechanical actuator |
10/13/2011 | US20110247833 High strength dissolvable structures for use in a subterranean well |
10/13/2011 | US20110247798 Tubing hanger running tool with integrated pressure release valve |
10/12/2011 | EP2374993A1 Downhole data communication |
10/12/2011 | EP2374991A2 Anhydrous boron-based delay plugs |
10/12/2011 | EP2374989A1 Mechanical bi-directional isolation valve |
10/12/2011 | CN202007650U Buoyancy-type valve shaft bottom blowout prevention switch |
10/12/2011 | CN1936267B Pressure-controlled bridging system |
10/11/2011 | CA2465011C Underbalanced well completion |
10/06/2011 | WO2011123617A2 Improved mud saver valve and method of operation of same |
10/06/2011 | WO2011122957A1 Device for a plug construction for conducting well tests |