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