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)
11/2008
11/25/2008CA2455101C Fiber optic based method and system for determining and controlling position of a sliding sleeve valve
11/25/2008CA2446529C Disconnect check valve mechanism for coiled tubing
11/20/2008WO2008099166A3 Valve seat assembly, downhole tool and methods
11/20/2008US20080283251 Method and apparatus for dropping a pump down plug or ball
11/20/2008US20080283238 Apparatus for autonomously controlling the inflow of production fluids from a subterranean well
11/19/2008CN201152167Y Downhole tool constant pressure signal valve
11/19/2008CN201152166Y Tilted hole ball type drill string back-pressure valve
11/19/2008CN201152165Y Compound type sand-setting uniflow valve
11/19/2008CN201152164Y Relief valve
11/19/2008CN101307680A Screw drilling tool by-pass valve
11/18/2008US7451828 Downhole pressure containment system
11/18/2008US7451825 Annular choke
11/18/2008US7451819 Openhole perforating
11/18/2008US7451809 Apparatus and methods for utilizing a downhole deployment valve
11/18/2008CA2392117C Production valve
11/13/2008WO2008137340A1 Tubing hanger with integral annulus shutoff valve
11/13/2008WO2008079782B1 Production actuated mud flow back valve
11/13/2008US20080277120 Retrievable frac mandrel and well control stack to facilitate well completion, re-completion or workover and method of use
11/13/2008US20080277110 Hydraulic open hole packer
11/12/2008EP1990505A1 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well
11/12/2008CN201148860Y Novel oil well single flow valve
11/12/2008CN101302927A Metering control valve and oil well quality on-line metering device using the same
11/11/2008US7448454 Method and system for return of drilling fluid from a sealed marine riser to a floating drilling rig while drilling
11/07/2008CA2587752A1 Mud saver valve
11/06/2008WO2008134311A1 Restrictor valve mounting for downhole screens
11/06/2008WO2008060891B1 Downhole lubricator valve
11/06/2008WO2007124374A3 Well tools with actuators utilizing swellable materials
11/06/2008US20080271895 Method and a device for regulating a fluid flow between an outside and an inside of a well pipe
11/06/2008US20080271883 Oil well completion tool having severable tubing string barrier disc
11/06/2008CA2739601A1 Restrictor valve mounting for downhole screens
11/06/2008CA2685053A1 Restrictor valve mounting for downhole screens
11/05/2008EP1456501B1 Method and apparatus for replacing bop with gate valve
11/05/2008CN201144674Y Novel downhole choke having sealing structure
11/05/2008CN201144668Y Oil pipe internal drainage device
11/05/2008CN201144667Y Anti-release blowout-preventing ball seat
11/05/2008CN201144666Y Blowout-preventing double-functional valve in oil pipe
11/04/2008US7445047 Metal-to-metal non-elastomeric seal stack
10/2008
10/30/2008WO2008130852A2 Christmas tree with internally positioned flowmeter
10/30/2008WO2008067152B1 Lubricator valve with rotational flip-flap arm
10/30/2008US20080264646 Modular Actuator for Subsea Valves and Equipment, and Methods of Using Same
10/29/2008EP1984597A1 Method and system for controlling a downhole flow control device
10/29/2008CN201141473Y Two-stage anti-theft cipher sampling valve
10/29/2008CN201141302Y Emptying-free anti-theft sampler
10/29/2008CN201141295Y Oil well and oil jacket communicating vessel
10/29/2008CN101294482A Shape memory materials for downhole tool applications
10/23/2008WO2008127126A2 Device of a test plug
10/23/2008WO2008125824A1 Control mechanism for subsurface safety valve
10/23/2008US20080262735 System and Method for Water Breakthrough Detection and Intervention in a Production Well
10/23/2008US20080257559 Hybrid Control System And Method
10/23/2008US20080257558 Shifting apparatus and method
10/23/2008US20080257557 Wellbore Control Device
10/23/2008CA2684006A1 Control mechanism for subsurface safety valve
10/23/2008CA2681422A1 Safety cement plug launch system
10/22/2008EP1315881B1 Method and system for perforating
10/22/2008CN201137485Y High pressure anti-theft constant-current water-mixing device
10/21/2008US7438131 Expandable injector pipe
10/21/2008US7438130 Downhole actuating apparatus and method
10/21/2008CA2360930C Multilateral well and electrical transmission system
10/16/2008WO2008104179A3 Drilling head for reborinq a stuck valve
10/16/2008WO2008094965A3 Rupture disc assembly that withstands much higher back pressures than actuation pressure
10/16/2008WO2008070674B1 Flow restriction apparatus and methods
10/16/2008WO2008070051B1 Restriction element trap for use with and actuation element of a downhole apparatus and method of use
10/16/2008WO2007083192B1 Wellbore system and method using a flow-actuated diverter valve
10/16/2008US20080251260 Stabilizing a flow along a wellbore
10/16/2008US20080251259 Safety valve
10/15/2008EP1980711A2 Downhole deployment valves
10/15/2008CN201133246Y Anti-theft antifreezing sampling valve
10/15/2008CN201133235Y Liquid flow controller
10/15/2008CN201133234Y Bidirectional type uniflow valve
10/15/2008CN201133233Y Wellhead safe automatic cutting device
10/15/2008CN100425797C Control system of well mouth release valve
10/14/2008US7434626 Deep set safety valve
10/14/2008CA2296108C Actuation system for a downhole tool
10/12/2008CA2629124A1 Safety valve
10/09/2008WO2008119931A1 Ball seat assembly and method of controlling fluid flow through a hollow body
10/09/2008WO2008095113A3 Chemical-injection management system
10/09/2008WO2008079777B1 Material sensitive downhole flow control device
10/09/2008US20080245531 Downhole deployment valves
10/08/2008EP1977076A1 Positional control of downhole actuators
10/08/2008EP1977075A1 Well tool having magnetically coupled position sensor
10/08/2008CN201129506Y Back valve
10/08/2008CN201129497Y Multifunctional pressure test ball valve
10/08/2008CN201129174Y Anti-freeze and anti-theft petroleum crude sample valve
10/08/2008CN201129167Y Anti-gas leakage gas well single flow valve
10/08/2008CN201129166Y Shearing flashboard valve
10/08/2008CN201129164Y Floating hoop and floating shoe core body with self-pouring function convenient for connecting
10/08/2008CN201129158Y Oilfield well head shutter
10/07/2008US7431091 Method and apparatus for wellbore fluid treatment
10/04/2008CA2744842A1 Downhole deployment valves
10/02/2008WO2007124041A3 A system and method for estimating supercharge pressure and initial pressure of a formation
10/02/2008US20080236839 Controlling flows in a well
10/02/2008US20080236838 Tool Trap Assembly and Method
10/02/2008US20080236835 Hydraulically Operated Protector For Downhole Devices
10/01/2008EP1974120A1 Cementing valve
10/01/2008CN201125709Y Pressure transmission valve
10/01/2008CN201125708Y Safety valve for inner pipe pillar
10/01/2008CN201125707Y Boring tool flechette-type pressure relief back valve
10/01/2008CN201125706Y Antifreeze, anti-theft back pressure meter valve
10/01/2008CN101275465A Monitoring and automatic control of operating parameters for a downhole oil/water separation system
10/01/2008CN101275461A Separate type oil riser bleeder
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