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)
04/2014
04/10/2014WO2014053062A1 Pressure sensitive cover for a fluid port in a downhole tool
04/10/2014WO2013138092A3 Reduced cavitation oilfield choke
04/10/2014WO2013028385A3 System and method for servicing a wellbore
04/10/2014US20140096978 Safety Valve System for Cable Deployed Electric Submersible Pump
04/10/2014US20140096976 Remote and manual actuated well tool
04/10/2014US20140096975 Well System With an Independently Retrievable Tree
04/10/2014US20140096973 Downhole flow control using perforator and membrane
04/10/2014US20140096963 Flow restrictor for use in a service tool
04/09/2014EP2715059A2 Pump system
04/09/2014EP2715054A2 Improved flow control system
04/09/2014EP2715053A2 Method of reducing deflection through a rod piston in a subsurface safety valve
04/09/2014EP2715052A1 System and method for servicing a wellbore
04/09/2014EP2715051A2 Ball valve
04/09/2014CN203531855U Gas-lift working barrel
04/09/2014CN203531848U Horizontal well completion real-time water controlling device
04/09/2014CN203531847U High-pressure bypass safety valve for downhole testing
04/09/2014CN203531846U Mortise type switching system
04/09/2014CN203531845U Novel corner type check valve
04/09/2014CN203531844U Pneumatic well opening safety control system
04/09/2014CN203531843U High-low pressure pilot valve for well mouth safety control system
04/09/2014CN203531842U Relay valve for well mouth safety control system
04/09/2014CN103711922A Seat apparatus and method
04/09/2014CN103711456A Hydraulic switching tool for deep-water oil well
04/09/2014CN103711455A Fixable ball-type production sleeve for deep-water oil well
04/09/2014CN102383761B Underground flow control valve based on fiber bragg grating sensing detection
04/08/2014US8689893 Check valve
04/08/2014US8689891 Ball and dart launcher with parallel axis release
04/08/2014US8689887 Methods of operating a radial flow valve
04/08/2014US8689886 Gate valve seat and seat ring
04/08/2014US8689885 Bi-directional flapper/sealing mechanism and technique
04/08/2014US8689884 Mud pulse telemetry system
04/08/2014US8689883 Adjustable venturi valve
04/08/2014CA2752336C Fail safe regulator for deep-set safety valve having dual control lines
04/08/2014CA2715250C System for drilling under-balanced wells
04/08/2014CA2618433C Cyclonic, debris removing valve and method
04/03/2014WO2014048794A1 Christmas tree and method
04/03/2014WO2014022320A3 Monitoring, diagnosing and optimizing gas lift operations
04/03/2014WO2013106615A3 Wellbore pressure actuation of downhole valves
04/03/2014WO2012127226A3 Wellbore valve assembly
04/03/2014US20140090851 Casing valves system for selective well stimulation and control
04/03/2014US20140090836 Safety Valve System for Cable Deployed Electric Submersible Pump
04/02/2014EP2713005A1 Drillstring valve
04/02/2014CN203515578U Anti-freeze anti-theft free-of-emptying oil well sampling device
04/02/2014CN203515567U Oil tube leakage detection switch
04/02/2014CN203515534U Thickened-oil thermal production well immovable-string dispensing joint exploitation device
04/02/2014CN203515527U Layering oil extraction device
04/02/2014CN203515498U Connected type associated gas recovery device
04/02/2014CN203515478U Production drill pipe joint bleeder
04/02/2014CN203515477U Centralizing sliding sleeve switch
04/02/2014CN203515476U Double-acting oil tube switch
04/02/2014CN203515475U Pressure-measurable type down-hole casing valve
04/02/2014CN203515474U Axial limiting check valve
04/02/2014CN203515473U Hydraulic two-way check valve
04/02/2014CN203515472U Down-hole operation multifunctional reversing valve
04/02/2014CN203515471U Bypass valve of drill pipe pup joint
04/02/2014CN203515470U Bottom switch for backward squeeze packing sand prevention of oil well
04/02/2014CN203515469U Oil well antitheft sampling device
04/02/2014CN203515468U Water injection well opening check valve convenient to dismantle
04/02/2014CN203515467U Expansion gate valve wedge disc reset mechanism
04/02/2014CN203515466U Low shearing regulating valve
04/02/2014CN203515465U Hidden type anti-theft oil check value
04/02/2014CN103703210A Selectively degradable passage restriction
04/02/2014CN103696748A Intelligent well cementation slide sleeve separate-layer fracturing transformation process pipe column without stage limitation
04/02/2014CN103696735A Anti-flyback type shaft isolating valve
04/02/2014CN103696734A Differential-pressure type pressure release valve of marine deep well pipe column
04/02/2014CN103696733A Pressure relief valve device of uninterrupted circulation system for oil drilling and implementation method thereof
04/02/2014CN103696732A Thermal recovery steam valve free of flow resistance
04/02/2014CN103696731A Quick cut-off device for wellhead production flow passages
04/02/2014CN102482929B Downhole device
04/02/2014CN102400661B Balance valve for continuous oil pipe multi-layer fracturing operation
04/02/2014CN101839117B Annulus safety valve
04/01/2014US8684099 System and method for formation isolation
04/01/2014US8684093 Electromechanical actuator apparatus and method for down-hole tools
04/01/2014US8684087 Downhole flow control using perforator and membrane
04/01/2014CA2792718A1 Self piloted check valve
03/2014
03/27/2014WO2014046841A2 Method of completing a multi-zone fracture stimulation treatment of a wellbore
03/27/2014WO2014046547A1 Valve, system and method for completion, stimulation and subsequent re-stimulation of wells for hydrocarbon production
03/27/2014WO2014043807A1 Wellbore tool with indexing mechanism and method
03/27/2014WO2014043806A1 Wellbore tool with indexing mechanism and method
03/27/2014WO2013034470A3 Adjustment device, side pocket mandrel and method related thereto
03/27/2014US20140083715 Remotely operated production valve and method
03/27/2014US20140083712 Safety Valve By-Pass System for Cable-Deployed Electric Submersible Pump
03/27/2014US20140083708 Systems and Methods for Reclosing a Sliding Side Door
03/27/2014US20140083685 Tubing conveyed multiple zone integrated intelligent well completion
03/27/2014US20140083684 Tubing conveyed multiple zone integrated intelligent well completion
03/27/2014US20140083680 System and Method for Detecting Screen-out using a Fracturing Valve for Mitigation
03/27/2014US20140083678 Ball seat for a well fracturing apparatus and method of making and using same
03/27/2014US20140083675 Single Trip Multi-Zone Completion Systems and Methods
03/26/2014EP2710220A2 Shear valve
03/26/2014CN203499637U Tubular column combination with oil drainage device
03/26/2014CN203499636U Oil field self-controlled back-pressure valve
03/26/2014CN203499635U Plug valve of kelly bar
03/26/2014CN203499634U DST (Drill Stem Test) automatic valve
03/26/2014CN203499633U Screw one-way bypass valve
03/26/2014CN203499630U Hydraulic sealing packer
03/26/2014CN203499609U Gas dividing valve of drilling tool
03/26/2014CN103688016A Multi-zone screened frac system
03/26/2014CN103688014A Selective hydraulic fracturing tool and method thereof
03/26/2014CN103670332A Wellbore isolation valve
03/26/2014CN103670331A Shaft isolation valve
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