E21B 34 - Valve arrangements for boreholes or wells

Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685)
06/2011
06/16/2011	WO2011019561A3 Tubular actuator, system and method
06/16/2011	US20110139460 Hydrocarbon production system, method for performing clean-up and method for controlling flow
06/16/2011	US20110139453 Fluid flow control device
06/16/2011	DE102008056261B4 Ventilzentrierung Ventilzentrierung
06/15/2011	EP2333232A2 Circulating sub
06/15/2011	CN201865628U Rotary oil leaking device
06/15/2011	CN201865627U Ball valve type oil reservoir protective valve
06/15/2011	CN201865626U Damage-free anchored oil draining device for underground pipe column
06/15/2011	CN201865625U Bidirectional back pressure valve for oilfield wellhead
06/15/2011	CN201865624U Perforated plate type throttle valve
06/15/2011	CN201865623U High temperature and low temperature resistant flat valve with pressure balancing hole
06/15/2011	CN201865622U Single tube ringlike blunging and heat mixing composite device
06/15/2011	CN201865578U Gas volume adjusting device for gas drilling
06/15/2011	CN1624295B stratum measuring apparatus and stratum measuring method
06/15/2011	CN102094596A Locking device for downhole sliding sleeve of intelligent well and operation method thereof
06/15/2011	CN102094595A Fully-enclosed device of upper part of injecting layer for downhole operation of high-pressure water injection well
06/15/2011	CN102094594A Device for totally sealing upper part of oil layer during underground operation of steam-driven well
06/15/2011	CN102094591A Fracturing packer for barefoot well
06/15/2011	CN102094577A Core valve jet-suction hydraulic down-the-hole (DTH) hammer
06/09/2011	WO2011068690A2 Gas lift valve
06/09/2011	WO2011031541A3 Method and apparatus for dropping a pump down plug or ball
06/09/2011	WO2011022284A3 Sliding sleeve locking mechanisms
06/09/2011	WO2011019645A3 Permanent magnet linear motor actuated safety valve and method
06/09/2011	WO2011019643A3 Tubular valving system and method
06/09/2011	US20110132618 Multi-position tool actuation system
06/09/2011	US20110132614 Wireline Run Mechanically or Hydraulically Operated Subterranean Insert Barrier Valve and Associated Landing Nipple
06/09/2011	US20110132613 Multiple Port Crossover Tool with Port Selection Feature
06/09/2011	US20110132592 Integrated system for the extraction, incineration and monitoring of waste or vented gases
06/08/2011	EP2145076B1 Methods and devices for treating multiple-interval well bores
06/08/2011	CN201857937U Check valve of electric submersible pump well
06/08/2011	CN201857936U Anti-theft gate for oil production well
06/08/2011	CN1806088B Submarine workover assembly and manufacture method thereof
06/07/2011	US7954555 Full function downhole valve and method of operating the valve
06/07/2011	US7954552 Overriding a primary control subsystem of a downhole tool
06/07/2011	US7954550 Tubing pressure insensitive control system
06/03/2011	WO2011065843A1 Device for a fluid operated valve body and method for operation of the valve body
06/03/2011	WO2011034695A3 Fracturing and gravel packing tool with multi movement wash pipe valve
06/03/2011	WO2011028559A3 Fracturing and gravel packing tool with upper annulus isolation in a reverse position without closing a wash pipe valve
06/03/2011	CA2781338A1 Device for a fluid operated valve
06/02/2011	US20110127044 Remotely controlled apparatus for downhole applications and methods of operation
06/02/2011	US20110127043 Gas lift valve
06/02/2011	US20110127042 Apparatus and method for treating a subterranean formation using diversion
06/02/2011	US20110127029 Dual pathway riser and its use for production of petroleum products in multi-phase fluid pipelines
06/02/2011	CA2687643A1 Method of sealing annular space between inner and outer upright tubes
06/01/2011	EP2326791A1 Subsea apparatus
06/01/2011	CN201851083U Two-way blowout-preventing oil drain device
06/01/2011	CN201851082U Fully-functional anti-spray oil drain device
06/01/2011	CN201851081U Adjustable-differential-pressure automatic grout valve
06/01/2011	CN201851080U Sampling valve capable of preventing impact abrasion
06/01/2011	CN201851079U Anti-oil theft and anti-freeze sampling valve
06/01/2011	CN201851064U Ocean underwater horizontal Christmas tree for oil pipe suspender with double wire rope plugs
06/01/2011	CN201851063U Submarine horizontal type oil extraction tree in the ocean
06/01/2011	CN201851060U Device for constant pressure, gas release and heat preservation of oil well casing
06/01/2011	CN201850859U Coded gate
06/01/2011	CN102084084A Choke trim assembly
06/01/2011	CN102080513A Fire flooding oil recovery wellhead device
06/01/2011	CN102080512A Multiposition one-way bypass connection structure for deep-water abandoned well cutting device
06/01/2011	CN102080511A Deepwater abandoned well cutting device having cementing plug and operation method of cementing plug thereof
05/2011
05/31/2011	US7950461 Screened valve system for selective well stimulation and control
05/31/2011	CA2437678C Apparatus and method for wellbore isolation
05/26/2011	WO2011062867A2 Subsurface safety valve and method of actuation
05/26/2011	WO2011062824A2 Subsurface safety valve and method of actuation
05/26/2011	WO2011062784A2 Anchor/shifting tool with sequential shift then release functionality
05/26/2011	WO2011060493A1 External casing packer
05/26/2011	WO2011028563A3 Multi-acting circulation valve
05/26/2011	WO2011028562A3 Isolation valve for subterranean use
05/26/2011	WO2011018623A3 System and method for servicing a wellbore
05/26/2011	US20110120773 Switchable circulating tool
05/26/2011	US20110120729 Modular electro-hydraulic controller for well tool
05/26/2011	US20110120728 Subsurface safety valve and method of actuation
05/26/2011	US20110120727 Subsurface safety valve and method of actuation
05/26/2011	US20110120726 Multi-Position Valve for Fracturing and Sand Control and Associated Completion Methods
05/26/2011	US20110120725 Wellbore instruments using magnetic motion converters
05/26/2011	US20110120722 Subsea control system with interchangeable mandrel
05/26/2011	CA2781001A1 External casing packer
05/25/2011	EP2324187A2 A controller for a downhole tool
05/25/2011	CN201843584U Tubing draining device
05/25/2011	CN201843583U Return-flow type bypass valve of spiral drilling rig
05/25/2011	CN201843582U Hydraulic sliding sleeve for well completion
05/25/2011	CN201843581U Double-center round plug and double-center round switch corresponding to same
05/25/2011	CN201843580U Antitheft valve
05/25/2011	CN201843579U Fixing screw cap for hand wheel of valve of Christmas tree
05/25/2011	CN201843578U Handwheel fixing clamp for well mouth gate
05/25/2011	CN201843577U Differential pressure exhaust valve for oil well mouth
05/25/2011	CN201843544U Metal-sealed one-way valve
05/25/2011	CN102071912A Underground hydraulic control switching device
05/25/2011	CN102071911A External differential pressure opening circulating valve
05/25/2011	CN102071910A Low-torque kelly cock valve
05/25/2011	CN102071909A Low-torque upper kelly cock valve
05/25/2011	CN102071908A Anti-blowout control valve
05/25/2011	CN102071907A High-pressure pipe manifold plug valve
05/25/2011	CN102071906A Thimble type one-way valve pressure relief device
05/24/2011	US7946347 Injection valve
05/19/2011	WO2011057416A1 Stage tool for wellbore cementing
05/19/2011	WO2011028558A3 Fracturing and gravel packing tool with anti-swabbing feature
05/19/2011	WO2011022323A3 Self aligning mud saver valve seat
05/19/2011	WO2011020006A3 Repeatable, compression set downhole bypass valve
05/19/2011	WO2011014634A3 Apparatus and method for controlling water in-flow into wellbores
05/19/2011	WO2011004161A3 Flow restrictor device
05/19/2011	US20110114335 Subsurface Safety Valve Flapper

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