Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685)
09/2010
09/22/2010EP2230378A1 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well
09/22/2010EP2229499A2 Ball dropping assembly and technique for use in a well
09/22/2010EP1676066B1 Internal blow out preventer ball and seat
09/22/2010CN201588608U Flow control screen pipe
09/22/2010CN201588599U Pipe column oil drain device
09/22/2010CN201588592U Wireless remote control blowout preventer control device with high pressure test function
09/22/2010CN101839117A Annulus safety valve
09/21/2010US7798235 Safety valve torsional spring assembly and method
09/21/2010US7798230 Downhole tool
09/21/2010US7798229 Dual flapper safety valve
09/21/2010CA2491825C Linear hydraulic stepping actuator with fast close capabilities
09/21/2010CA2464050C Flow control mechanism for a downhole tool
09/21/2010CA2422996C Valve closing device
09/16/2010US20100230113 Multi-stage modulator
09/16/2010US20100230112 Multi-Channel, Combination Coiled Tubing Strings for Hydraulically Driven Downhole Pump
09/16/2010US20100230109 Methods for Preventing Mineral Scale Buildup in Subsurface Safety Valves
09/15/2010CN201582473U Electromagnetic valve for wireless measurement-while-drilling system
09/15/2010CN201581878U Cast-free dead-opening eccentric water distributor
09/15/2010CN201581864U Well cleaning pressure device
09/15/2010CN201581863U Anti-falling tubing drain
09/15/2010CN201581862U Dropping-prevention by-pass valve assembly
09/15/2010CN201581861U Integral anti-drop bypass valve
09/15/2010CN101835955A Multi-function indicating tool
09/15/2010CN101832120A Bidirectional slip insert mechanical casing valve
09/15/2010CN101832119A Low-consumption flat valve
09/14/2010US7793732 Backpressure valve for wireless communication
09/14/2010US7793729 Gate valve and method of controlling pressure during casing-while-drilling operations
09/13/2010CA2695329A1 Wireline run fracture isolation sleeve and plug and method of operating same
09/10/2010WO2010101775A2 Circulation control valve and associated method
09/10/2010WO2010101752A2 Subterranean screen with varying resistance to flow
09/10/2010WO2010099623A1 Control logic method and system for optimizing production from natural gas wells
09/10/2010CA2787510A1 Control valve assembly
09/10/2010CA2752521A1 Circulation control valve and associated method
09/09/2010US20100224410 System and method for damping vibration in a drill string using a magnetorheological damper
09/09/2010US20100224371 Circulation control valve and associated method
09/08/2010EP2225437A1 Valve assembly
09/08/2010EP2225435A1 Screened valve system for selective well stimulation and control
09/08/2010CN201574726U Resistance-prevention and pressure-limiting anchoring oil drainage device for oilfields
09/08/2010CN201574725U Casing pressure tapping device at steam injection wellhead
09/08/2010CN101828002A Permeable medium flow control devices for use in hydrocarbon production
09/08/2010CN101828001A Water sensing devices and methods utilizing same to control flow of subsurface fluids
09/08/2010CN101828000A Water control device using electromagnetics
09/08/2010CN101824974A Self-sealing type floating well head water injecting valve
09/07/2010US7789156 Flapper valve for use in downhole applications
09/07/2010CA2572516C Flow control apparatus for use in a wellbore
09/02/2010WO2010099010A1 Linearly actuated hydraulic switch
09/02/2010US20100218955 Oil field system for through tubing rotary drilling
09/01/2010EP2222989A2 Electro-magnetic multi choke position valve
09/01/2010EP2222936A2 Multi-position valves for fracturing and sand control associated completion methods
09/01/2010CN201568025U Quick-mounted blowout-control and anti-jacking well control device
09/01/2010CN201568024U Reverse well-flushing valve
09/01/2010CN201568023U Underground self-balance blowout control drip
09/01/2010CN201568022U Pipe column underground switch for changing deep horizontal gas-well bare-hole after being segmented and cracked
09/01/2010CN201568021U Backpack-type safe turn-off system
09/01/2010CN201568020U Double-pipe watering antifreeze well head combined device
09/01/2010CN201568019U Single-pipe annular heat-mixing assembled device at oil well mouth
09/01/2010CN201568018U Novel device for replacing main control valve of oil-gas wellhead under pressure without loosing hands
09/01/2010CN101821476A Flow restriction device
09/01/2010CN101821474A Circulation control valve and associated method
09/01/2010CN101818630A Mechanical underbalance downhole casing valve
09/01/2010CN101818629A Method for converting down-hole pressure into power for opening and closing oil testing valve
08/2010
08/31/2010US7784553 Downhole waterflood regulator
08/31/2010US7784549 Self-propelled swabbing device and method
08/26/2010WO2010096309A1 Triggering mechanism discriminated by length difference
08/26/2010WO2010096255A2 Screen flow equalization system
08/26/2010US20100212963 Measurement while drilling apparatus and method of using the same
08/26/2010US20100212912 Valve
08/26/2010US20100212911 Triggering mechanism discriminated by length difference
08/26/2010US20100212910 Fluid metering device and method for well tool
08/26/2010US20100212908 Stealth Orifice
08/26/2010US20100212907 Full Bore Valve for Downhole Use
08/26/2010US20100212900 Running and Cement Tubing
08/26/2010US20100212895 Screen Flow Equalization System
08/26/2010US20100212881 Dual Mini Well Surface Control System
08/25/2010EP2221450A1 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well
08/25/2010EP2221448A2 Fluid metering device and method for well tool
08/25/2010CN201561163U Big-runner check valve
08/25/2010CN201561130U Oil well plug valve
08/25/2010CN201560742U Check valve for drill bit of downhole drill hammer
08/25/2010CN201560741U Hydraulic switch of borehole oil sleeve communicator
08/25/2010CN201560740U Novel drilling pump valve assembly
08/25/2010CN101812982A Switch valve device for passing pipe column in bottom hole for oil-gas well production
08/25/2010CN101812981A Mechanical underground all-in-one blowout preventer
08/24/2010US7779925 Seal assembly energized with floating pistons
08/24/2010US7779919 Flapper valve retention method and system
08/24/2010US7779918 Wellbore control device
08/23/2010CA2821553A1 Fluid metering device and method for well tool
08/23/2010CA2692670A1 Fluid metering device and method for well tool
08/19/2010WO2009123472A3 System and method for recompletion of old wells
08/19/2010WO2009113870A3 System and method for controlling the flow of fluid in branched wells
08/19/2010US20100206584 Downhole tubular connector
08/19/2010US20100206579 Fail as is mechanism and method
08/19/2010US20100206576 Apparatus and Method for Recovering Fluids From a Well and/or Injecting Fluids Into a Well
08/19/2010US20100206572 Stage cementing tool
08/19/2010US20100206566 One Trip Cemented Expandable Monobore Liner System and Method
08/19/2010US20100206547 Apparatus and Method for Recovering Fluids From a Well and/or Injecting Fluids Into a Well
08/19/2010US20100206546 Apparatus and Method for Recovering Fluids From a Well and/or Injecting Fluids Into a Well
08/19/2010CA2751320A1 Stage cementing tool
08/18/2010CN201554426U Pollution-free well-washing device
08/18/2010CN201554425U Position-limiting inverted valve
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