Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 34 - Valve arrangements for boreholes or wells
Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685)
10/2012
10/24/2012CN202500534U Valve type oil pipe floating valve device
10/24/2012CN202500533U Double-bellows gas lift valve with set pressure range valves
10/24/2012CN202500532U Ball-throwing pressure-suppressing opening type constant-pressure float valve for oil pipe
10/24/2012CN202500531U Pressure release valve structure of downhole instrument
10/24/2012CN202500530U Sliding sleeve oil drainer for deep well
10/24/2012CN202500529U Divided-flow check valve
10/24/2012CN202500528U Multi-purpose right-angle check valve
10/24/2012CN202500527U Adjustable overpressure resistant oil nozzle sleeve
10/24/2012CN202500526U Surface valve used for oil and gas exploitation fracturing
10/24/2012CN202500521U High-pressure large flow water inrush borehole safety system
10/24/2012CN202500516U Secondary pressure-relief outburst-preventing device and engineering machine
10/24/2012CN101421487B Gravel pack crossover tool with single position multi-function capability
10/23/2012US8291984 Control device for an inflatable tool for the treatment of a well or a pipeline
10/23/2012US8291982 Multi-position valve for fracturing and sand control and associated completion methods
10/23/2012US8291981 Shear open valve
10/23/2012US8291976 Fluid flow control device
10/23/2012CA2670135C Control line hydrostatic minimally sensitive control system
10/18/2012WO2012141881A2 Pressure equalization apparatus and associated systems and methods
10/18/2012WO2012141842A2 Ball seat having ball support member
10/18/2012WO2012141753A1 Safety valve with electrical actuator and tubing pressure balancing
10/18/2012WO2012115749A3 Remotely operated production valve and method
10/18/2012US20120261139 Pressure equalization apparatus and associated systems and methods
10/18/2012US20120261137 Flow control system
10/18/2012US20120261136 Selectively activatable and deactivatable wellbore pressure isolation device
10/18/2012US20120261131 Assembly for Actuating a Downhole Tool
10/17/2012EP2511470A2 Cluster opening sleeves for wellbore
10/17/2012CN202493248U Water distributor for oil field oil well ground water injection
10/17/2012CN202493242U Unidirectional constant-pressure sleeving cock device
10/17/2012CN202493241U Slide sleeve type sleeve pipe gate
10/17/2012CN202493240U Antifreeze-type pressure-stabilizing and gas discharging oil extraction composite set
10/17/2012CN202493239U Blowout preventer
10/17/2012CN202493222U Quick pipe flushing connector
10/17/2012CN102741497A External casing packer
10/17/2012CN102733780A Controlling a tool
10/17/2012CN102733779A Monitoring and automatic control of operating parameters for a downhole oil/water separation system
10/17/2012CN102733778A Manually-adjustable throttle valve capable of mining mirabilite halide liquid in deep well
10/17/2012CN102733772A Christmas tree of tubing head for borehole operation without killing well
10/17/2012CN101949274B Casing shut-in valve for cementing operation
10/17/2012CN101684724B Snubbing downhole control valve
10/17/2012CN101646835B Drilling tool with feed control
10/16/2012US8286713 Oil and gas well completion system and method of installation
10/16/2012US8286710 Valve assembly
10/16/2012US8286709 Multi-point chemical injection system
10/15/2012CA2772277A1 Cluster opening sleeves for wellbore
10/14/2012CA2774319A1 Assembly for actuating a downhole tool
10/11/2012WO2012138681A2 Method and apparatus for controlling fluid flow in an autonomous valve using a sticky switch
10/11/2012WO2012138446A1 Annular circulation valve and methods of using same
10/11/2012WO2012106350A3 Segmented collapsible ball seat allowing ball recovery
10/11/2012WO2012054324A3 Remotely controllable fluid flow control assembly
10/11/2012US20120255777 Wellbore pressure control with optimized pressure drilling
10/11/2012US20120255741 Annular circulation valve and methods of using same
10/11/2012US20120255740 Method and apparatus for controlling fluid flow in an autonomous valve using a sticky switch
10/11/2012US20120255739 Selectively variable flow restrictor for use in a subterranean well
10/11/2012US20120255738 Multi-barrier system and method
10/11/2012CA2828689A1 Method and apparatus for controlling fluid flow in an autonomous valve using a sticky switch
10/10/2012EP2508708A1 Method of completing a well
10/10/2012CN202483532U Hierarchical oil production control device
10/10/2012CN202483513U Sliding sleeve for separate layer reconstruction
10/10/2012CN202483512U Mechanical shifting valve
10/10/2012CN202483511U Retrievable anti-blocking safety valve and special fishing tool thereof
10/10/2012CN202483510U Ground check valve of electric submersible pump oil extraction well
10/10/2012CN202483509U Frost-cracking preventing oil-production wellhead valve
10/10/2012CN202483508U Double-cylinder hydraulic security valve
10/10/2012CN202483496U Multifunctional totally-closed anti-theft well head device
10/10/2012CN102720471A Safety valve of pressure control water injection well
10/10/2012CN102720464A Subsurface safety valve
10/10/2012CN102720463A Novel throttling and depressurizing device
10/10/2012CN101688440B Gas valve and production tubing with a gas valve
10/09/2012US8281866 Production tubing drain valve
10/09/2012US8281865 Tubular valve system and method
10/09/2012US8281864 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well
10/04/2012WO2012135381A2 System for protecting against undersea oil spills
10/04/2012WO2012135219A2 Thermally-actuated gas lift safety valve
10/04/2012WO2012130144A1 Hydraulically-controlled multi-switch valve and positioning instrument therefor
10/04/2012WO2012097280A3 Rotational wellbore test valve
10/04/2012WO2012082491A3 Geothermal energy production
10/04/2012WO2012082489A3 Restricting production of gas or gas condensate into a wellbore
10/04/2012US20120247784 System for protecting against undersea oil spills
10/04/2012US20120247780 Thermally-Actuated Gas Lift Safety Valve
10/04/2012US20120247767 Stage tool for wellbore cementing
10/03/2012EP2504521A1 Device for a fluid operated valve body and method for operation of the valve body
10/03/2012CN202467764U Safety flow-releasing decompressor
10/03/2012CN202467763U High-pressure valve for cementing
10/03/2012CN202467762U Pumping well polished rod sealer gate plate
10/03/2012CN202467761U Novel Christmas tree oil pipe cap with safety gate device
10/03/2012CN202467741U Burglar alarm of oil well sleeve
10/03/2012CN102713135A Dual barrier plug system for a wellhead
10/03/2012CN102704904A Multi-stage fracturing sliding sleeve device and using method thereof
10/03/2012CN102704891A Device for collecting oil well natural gas
10/03/2012CN102704890A Controllable blanking plug
10/03/2012CN102704889A Pilot-operated type solenoid valve for gas well wellhead and valve plug lifting mechanism
10/02/2012US8276677 Coiled tubing bottom hole assembly with packer and anchor assembly
10/02/2012US8276675 System and method for servicing a wellbore
10/02/2012US8276674 Deploying an untethered object in a passageway of a well
10/02/2012US8276669 Variable flow resistance system with circulation inducing structure therein to variably resist flow in a subterranean well
10/02/2012US8276662 Systems and methods to filter and collect downhole fluid
09/2012
09/27/2012WO2012082469A3 Plural barrier valve system with wet connect
09/27/2012WO2011104516A8 Pressure-activated valve for hybrid coiled tubing jointed tubing tool string
09/27/2012US20120241168 Method and system for segmental flow control in oil-gas well
09/27/2012US20120241167 Flow activated sensor assembly
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