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