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)
07/2010
07/06/2010US7748461 Method and apparatus for multi-drop tool control
07/06/2010US7748460 Method and apparatus for wellbore fluid treatment
07/06/2010CA2637382C Well tool having magnetically coupled position sensor
07/01/2010US20100163309 Sub-Surface Deployment Valve
07/01/2010US20100163241 Modular saddle flapper valve
07/01/2010US20100163235 Efficient single trip gravel pack service tool
06/2010
06/30/2010EP2201215A1 Circulation control valve and associated method
06/30/2010EP2201214A1 Activating mechanism
06/30/2010EP2201213A1 Oil field system for through tubing rotary drilling
06/30/2010EP2201211A1 Setting tool for expandable liner hanger and associated methods
06/30/2010CN201517397U Fixed subsurface choke
06/30/2010CN201517396U Preset downhole choke and delivery tool
06/30/2010CN201517395U Block-resistant sampling valve for oil well
06/30/2010CN201517394U Anti-theft blocking-removing check valve of oil production well head
06/30/2010CN201517393U 背压阀 Backpressure valve
06/30/2010CN201517392U Inclined well water injection bottom valve device
06/29/2010US7743833 Pressure balanced piston for subsurface safety valves
06/29/2010CA2620849C Chemical delivery system for plunger lift
06/24/2010US20100155143 Continuous fluid circulation valve for well drilling
06/24/2010US20100155081 Fluid actuated circulating sub
06/24/2010US20100155080 Bidirectional ram bop and method
06/24/2010US20100155079 Bellows valve
06/23/2010CN201513157U Inverse well-flushing double seal check valve
06/23/2010CN201513156U Unidirectional switch at bottom of oil pipe
06/23/2010CN201513131U Tubular column for drilling plugs in well repairing
06/23/2010CN101748983A Protector for oil pipe working under pressure used for oil well
06/22/2010US7740075 Pressure relief actuated valves
06/22/2010CA2542060C Valve for controlling the flow of fluid between an interior region of the valve and an exterior region of the valve
06/17/2010US20100147531 Downhole tools
06/17/2010US20100147525 High pressure fast response sealing system for flow modulating devices
06/16/2010CN201507279U Separate-acidification hydraulic switch as well as upper valve and lower valve thereof
06/16/2010CN201507278U Oilfield down-hole oil tube water filling balanced pressure apparatus
06/16/2010CN201507277U Blowout prevention pressure testing and oil drain switch
06/16/2010CN201507276U Sand prevention valve for controlling washing of well
06/16/2010CN201507275U Filter sleeve integral-type bypass valve of screw drill
06/16/2010CN201507274U Leak-resistance valve
06/16/2010CN201507273U Kelly bar splash valve
06/16/2010CN201507272U Mounting clamping board and positioning bolt used for pressurized valve replacement and
06/16/2010CN101737020A Oil pumping state switching and effect-increasing device
06/15/2010US7735560 Distortion compensation for rod piston bore in subsurface safety valves
06/15/2010US7735557 Wireline slip hanging bypass assembly and method
06/10/2010WO2010065311A2 Tubing weight operation for a downhole tool
06/10/2010WO2010064922A1 Wellhead having an integrated safety valve and method of making same
06/10/2010WO2010064053A1 Flow control device
06/10/2010WO2010027738A3 System for selective incremental closing of a hydraulic downhole choking valve
06/10/2010WO2009085813A3 Ball dropping assembly and technique for use in a well
06/10/2010US20100139923 System and method for controlling flow in a wellbore
06/10/2010US20100139910 Annulus isolation valve
06/10/2010US20100139909 Intelligent Well Control System for Three or More Zones
06/10/2010CA2744593A1 Flow control device
06/09/2010CN201502358U Oil drainage device
06/09/2010CN201502357U Constant-pressure automatic gas discharge/collecting device of oil well sleeve
06/08/2010US7730968 Apparatus for wellbore communication
06/08/2010US7730954 Hydraulic control and actuation system for downhole tools
06/08/2010CA2554066C Mechanically opened ball seat and expandable ball seat
06/03/2010WO2010062417A1 Utilizing swellable materials to control fluid flow
06/03/2010WO2010062187A1 Bellows valve
06/03/2010WO2010062181A1 Method for modifying an existing subsea arranged oil production well, and a thus modified oil production well
06/03/2010US20100132954 Ball seat assembly and method of controlling fluid flow through a hollow body
06/03/2010CA2742884A1 Bellows valve
06/03/2010CA2742577A1 Method for modifying an existing subsea arranged oil production well, and a thus modified oil production well
06/02/2010EP2191100A1 Annular pressure monitoring during hydraulic fracturing
06/02/2010EP2191099A1 Downhole valve for preventing zonal cross-flow
06/02/2010CN201496039U Plug valve with grease injection function
06/02/2010CN201496038U Downhole isotonic electric oil nozzle
06/02/2010CN201496037U Electric equipressure oil nozzle
06/02/2010CN201496036U Constant-pressure choke
06/02/2010CN201496035U Sand prevention bottom valve
06/02/2010CN201496034U Integral oil well head anti-theft temporary blocking ball valve
06/02/2010CN201496033U Deflation valve for closed production space of oil well
06/02/2010CN201496032U Novel well head device of oil pumping machine
06/02/2010CN201496031U Water tap
06/02/2010CN201496024U Gate valve type polished rod sealer
06/02/2010CN101718182A Ball valve type inside and outside integrative downhole blow-out preventer
06/02/2010CN101718181A Lifting valve type underground inside-outside integrated blowout preventer
06/02/2010CN101718167A Check valve device installed on well out of control
06/01/2010US7726418 Method and apparatus for adding a tubular to drill string with diverter
06/01/2010CA2541111C Mud flow back valve
06/01/2010CA2485810C System and method to control multiple tools through one control line
05/2010
05/27/2010WO2010059062A1 A method and apparatus for controlling the flow of fluid in oil and/or gas production
05/27/2010WO2010059060A1 Real time downhole intervention during wellbore stimulation operations
05/27/2010WO2010058160A1 Apparatus and method for servicing a wellbore
05/27/2010WO2010040095A3 Downhole ball mechanism with enhanced drift clearance
05/27/2010US20100126731 Apparatus and methods to remove impurities at a sensor in a downhole tool
05/27/2010US20100126730 On demand actuation system
05/27/2010US20100126725 Coiled tubing bottom hole assembly with packer and anchor assembly
05/27/2010US20100126712 Tubing Weight Operation for a Downhole Tool
05/27/2010CA2778426A1 Real time downhole intervention during wellbore stimulation operations
05/27/2010CA2743381A1 Apparatus and method for servicing a wellbore
05/26/2010EP2189622A2 Casing valves system for selective well stimulation and control
05/26/2010EP2189621A1 Well tool system and method of operating a downhole well tool
05/26/2010EP2188488A2 Tubing retrievable injection valve
05/26/2010CN201486538U Sand prevention pipe string used for open-hole well completion of side-drilled multilateral well and plug-in type acid cleaning filling inner pipe string thereof
05/26/2010CN201486524U Underground annulus pressure opening valve
05/26/2010CN201486523U High-pressure water return preventing safety control device in borehole rod below high-pressure water head
05/26/2010CN201486522U Ultra pressure-loss pilot valve applied to safety valve control system at mouths of petroleum and natural gas wells
05/26/2010CN201486521U Well control manifold pressure relief and cleaning device
05/26/2010CN201486520U Position straightener for oil well processes
05/26/2010CN201486519U High-pressure unimpeded switch valve
05/25/2010US7721823 Moveable blades and bearing pads
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