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)
09/2012
09/27/2012US20120241143 Well tools incorporating valves operable by low electrical power input
09/26/2012CN202451112U Re-operating blowout preventing tail pipe valve for well completion
09/26/2012CN202451111U Water injection control valve for water injection well
09/26/2012CN202451110U Wellhead one-way valve
09/26/2012CN202451109U Aboveground pressure relief device of oil-well pump
09/26/2012CN202451108U Ring-type integrated well-washing composite device
09/26/2012CN202451102U Wellhead blowout-controlling blowout preventer
09/26/2012CN102695846A Process and apparatus to improve reliability of pinpoint stimulation operations
09/25/2012US8272445 Tubular valve system and method
09/25/2012US8272443 Downhole progressive pressurization actuated tool and method of using the same
09/25/2012US8272435 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well
09/25/2012CA2584952C Safety valve having mono spring closure mechanism
09/20/2012WO2012125454A2 Pressure coring assembly and method
09/20/2012WO2012125404A2 Remote subterranean tool activation system
09/20/2012WO2012125261A2 Flow control screen assembly having remotely disabled reverse flow control capability
09/20/2012WO2012125250A2 Valving system, method of adjusting a valve and method of fracing a wellbore
09/20/2012WO2012082488A3 Controlling flow of steam into and/or out of a wellbore
09/20/2012US20120234558 Remotely operated isolation valve
09/20/2012US20120234557 Method and apparatus for autonomous downhole fluid selection with pathway dependent resistance system
09/20/2012US20120234550 Mudline Managed Pressure Drilling and Enhanced Influx Detection
09/20/2012US20120234545 Valving system, method of adjusting a valve and method of fracing a wellbore
09/20/2012CA2830213A1 High pressure coring assembly and method
09/20/2012CA2826943A1 Remote subterranean tool activation system
09/20/2012CA2826567A1 Flow control screen assembly having remotely disabled reverse flow control capability
09/19/2012EP2499331A2 Downhole progressive pressurization actuated tool and method of using the same
09/19/2012CN202441349U Automatic back pressure and overflow-releasing device of water injection well during power failure
09/19/2012CN202441329U Oilfield self-sealing reverse circulation valve
09/19/2012CN202441328U Gas lift valve
09/19/2012CN202441327U Antitheft device for pressure gauge
09/19/2012CN202441326U Ground check valve of pumping well
09/19/2012CN202441325U Antitheft valve for oilfield and special wrench for antitheft valve
09/19/2012CN202441304U Sucker rod base sealing device
09/19/2012CN202441276U Axial casing pipe controller
09/19/2012CN102686826A Downhole progressive pressurization actuated tool and method of using the same
09/19/2012CN102678093A Vertical cementing manifold for offshore oil production
09/19/2012CN102678086A Novel pore plate type throttle valve for salt well
09/19/2012CN102678085A High-pressure metallic seal rotary plunger valve for oil well
09/19/2012CN102678080A Double-stage lifting oil-water well snubbing operation device
09/19/2012CN102678079A Natural gas double-wellhead device
09/18/2012US8267181 Open-hole mudcake cleanup
09/18/2012US8267180 Remotely controllable variable flow control configuration and method
09/18/2012US8267178 Valve for hydraulic fracturing through cement outside casing
09/18/2012US8267177 Means for creating field configurable bridge, fracture or soluble insert plugs
09/18/2012US8267168 Regulator dampening device and method
09/16/2012CA2771741A1 Downhole system and apparatus incorporating valve assembly with resilient deformable engaging element
09/16/2012CA2771732A1 Multistage production system incorporating valve assembly with collapsible or expandable c-ring
09/15/2012CA2770926A1 Downhole backspin retarder for progressive cavity pump
09/13/2012US20120227983 Safety valve control system and method of use
09/13/2012US20120227982 Flow stop valve
09/13/2012US20120227981 Real time downhole intervention during wellbore stimulation operations
09/13/2012US20120227980 Selective dart system for actuating downhole tools and methods of using same
09/13/2012US20120227979 Flow restrictor device
09/13/2012US20120227973 Tool with Multisize Segmented Ring Seat
09/13/2012US20120227972 Subsea arrangement
09/13/2012CA2827888A1 Check valve assembly for well stimulation operations
09/12/2012DE202012008247U1 Bohrkrone inkl. Rückschlagventil-System Drill bit incl. Non-return valve system
09/12/2012CN202431252U Rapid-inserting type open-blow rotary faucet
09/12/2012CN202431251U Multifunctional snubbing valve
09/12/2012CN102667053A Wireline-adjustable downhole flow control devices and methods for using same
09/12/2012CN102661130A By-pass type oil pipe float valve
09/12/2012CN102661129A Method for controlling opening and closing of sliding sleeve by mechanically encoding
09/12/2012CN101812981B Mechanical underground all-in-one blowout preventer
09/11/2012US8261839 Variable flow resistance system for use in a subterranean well
09/11/2012US8261836 Downhole deployment valves
09/11/2012US8261835 Dual acting rod piston control system
09/11/2012US8261817 Modular hydraulic operator for a subterranean tool
09/06/2012US20120222860 Selective placement of conformance treatments in multi-zone well completions
09/05/2012EP2494146A1 Plug retainer and method for wellbore fluid treatment
09/05/2012EP2494141A2 Hydraulic control system monitoring apparatus and method
09/05/2012CN202418661U Easily-opened high-pressure gate valve with one hand wheel and two valve rods
09/05/2012CN202417432U Hydraulic-balancing mechanical water detection-and-plugging switch
09/05/2012CN202417431U Combined type underground hydraulic decompression valve
09/05/2012CN202417430U Water injecting valve provided with flow regulating function and used for water distributor
09/05/2012CN202417429U Multifunctional oil well constant pressure air-release valve
09/05/2012CN202417428U Anti-theft sampling gate
09/05/2012CN202417427U High/low temperature resistant wellhead valve
09/05/2012CN202417363U Snubbing valve exchanging device
09/05/2012CN202417342U Drilling tool joint convenient for inclination measurement operation
09/05/2012CN102656336A Device for a fluid operated valve body and method for operation of the valve body
09/05/2012CN101818630B Mechanical underbalance downhole casing valve
09/04/2012US8256522 Sand control screen assembly having remotely disabled reverse flow control capability
09/04/2012US8256518 Fail as is mechanism and method
09/04/2012US8256508 Downhole safety valve apparatus and method
08/2012
08/30/2012WO2012115997A2 Apparatus and method for increasing the ultimate recovery of natural gas contained in shale and other tight gas reservoirs
08/30/2012WO2012115891A2 Method and apparatus for pulling a crown plug
08/30/2012WO2012115868A2 Multi-stage valve actuator
08/30/2012WO2012115749A2 Remotely operated production valve and method
08/30/2012US20120217021 Activation device for use in a downhole well
08/30/2012CA2827904A1 Apparatus and method for increasing the ultimate recovery of natural gas contained in shale and other tight gas reservoirs
08/29/2012EP2492437A2 Activation device for use in a downhole well
08/29/2012CN202402004U Negative pressure de-plugging well-flushing anti-backflow multifunctional underground device
08/29/2012CN102650204A Liquid control check valve
08/29/2012CN102650203A Buoyant valve and self-balancing arrangement method for valve-contained operation sleeve for gas pumping hole
08/29/2012CN101781978B Integrated control system for safety block valve
08/29/2012CN101718181B Lifting valve type underground inside-outside integrated blowout preventer
08/28/2012US8251150 Radial flow valve and method
08/28/2012US8251146 Frac sleeve system and method
08/28/2012CA2660219C System and method for thru tubing deepening of gas lift
08/28/2012CA2630105C Integrated plug/choke valve
08/23/2012WO2012112657A2 Integrated zonal contact and intelligent completion system
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