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)
12/2012
12/06/2012CA2836860A1 System and method for servicing a wellbore
12/06/2012CA2836629A1 Wellbore cementing tool having one way flow
12/05/2012EP2529078A2 Control system for a surface controlled subsurface safety valve
12/05/2012EP2529076A2 A tool for installing units in a well
12/05/2012CN202578635U Acidization flowback valve of oil-water well
12/05/2012CN202578634U Switching type rail sealing sliding sleeve
12/05/2012CN202578633U Anti-freezing and anti-blocking sampling valve for heavy oil wellhead
12/05/2012CN202578632U Anti-theft locking device with clamping hoop for oil production wellhead valve
12/05/2012CN202578631U Control system for return pressure of wellhead of pressure-controlling drilling well
12/05/2012CN202578630U Wellhead check valve of water injection well
12/05/2012CN202578629U Oil well wellhead novel consolidation valve group
12/05/2012CN202578628U Check valve
12/05/2012CN202578595U Rush installing device for plug valve of oil tube
12/05/2012CN102808597A Oil draining device for oil pipe
12/05/2012CN102808596A Downhole constant pressure valve for oil tube
12/05/2012CN102808595A Adjustable sleeve air release device
12/04/2012US8322447 Generating power in a well
12/04/2012US8322446 Remote actuation of downhole well tools
12/04/2012US8322443 Wellhead tree pressure limiting device
12/04/2012US8322426 Downhole actuator apparatus having a chemically activated trigger
12/04/2012US8322417 Temperature triggered actuator for subterranean control systems
11/2012
11/29/2012WO2012162528A2 Pump system
11/29/2012WO2012162157A2 Formation treatment system and method
11/29/2012WO2012115997A3 Apparatus and method for increasing the ultimate recovery of natural gas contained in shale and other tight gas reservoirs
11/29/2012WO2012047847A8 Status indicators for use in earth-boring tools having expandable members and methods of making and using such status indicators and earth-boring tools
11/29/2012US20120298377 Velocity Strings
11/29/2012US20120298371 Flapper valve
11/29/2012US20120298370 Flow restriction devices
11/29/2012US20120298356 Dual-Purpose Steam Injection and Production Tool
11/29/2012CA2837299A1 Improved flow control system
11/29/2012CA2834794A1 Formation treatment system and method
11/28/2012EP2526324A1 Cage valve with flow trim for reduced fracturing
11/28/2012EP2526253A2 Ball drop module
11/28/2012CN202560180U A buried type gas-lift working barrel
11/28/2012CN202560165U Valve element reset system of down-hole check valve for oil and gas drilling
11/28/2012CN202560164U Mining filling drilling accidental blowdown valve
11/28/2012CN202560163U Throttle valve
11/28/2012CN202560162U Multipurpose well mouth combined-type valve
11/28/2012CN202560161U Check valve with pressure release valve
11/28/2012CN202560160U Thick oil wellhead anti-backflow oil nozzle
11/28/2012CN202560159U Fire-fighting environment-friendly safe gate valve device
11/28/2012CN102797436A Rotary type tubing drain and use method thereof
11/28/2012CN102797435A Safety valve of ground hydraulic control water injection well
11/28/2012CN102797434A Safety valve of pneumatic control water injection well
11/28/2012CN102797433A Differential deep water blowout preventer control valve
11/28/2012CN102797432A Pierce preventing pup joint for choke manifold
11/28/2012CN102797431A High-performance metal sealing mud valve used in brine well
11/28/2012CN101532391B In-hole drilling tool integrating drilling, slotting and punching coal seam and using method thereof
11/27/2012US8316953 Valve
11/27/2012US8316951 Tubular actuator and method
11/27/2012US8316950 Systems and methods for deliquifying a commingled well using natural well pressure
11/27/2012US8316946 Subsea completion with a wellhead annulus access adapter
11/27/2012US8316944 System for pulse-injecting fluid into a borehole
11/22/2012WO2012125404A3 Remote subterranean tool activation system
11/22/2012WO2012109562A3 Flow control device and methods for using same
11/22/2012WO2012040140A3 System and method for controlling flow in a wellbore
11/22/2012WO2011120959A3 An actuator device
11/22/2012US20120292116 Vortex Controlled Variable Flow Resistance Device and Related Tools and Methods
11/22/2012US20120292044 Telemetric chemical injection assembly
11/22/2012US20120292034 Dual Barrier Side Pocket Mandrel
11/22/2012US20120292033 Vortex Controlled Variable Flow Resistance Device and Related Tools and Methods
11/22/2012US20120292032 Wellbore treatment apparatus and method
11/22/2012US20120292030 System and method for pinpoint fracturing initiation using acids in open hole wellbores
11/22/2012US20120292029 Linear pressure reducer for regulating injection pressure in an enhanced oil recovery system
11/22/2012US20120292020 Vortex Controlled Variable Flow Resistance Device and Related Tools and Methods
11/22/2012US20120292019 Vortex Controlled Variable Flow Resistance Device and Related Tools and Methods
11/22/2012US20120292018 Vortex Controlled Variable Flow Resistance Device and Related Tools and Methods
11/22/2012US20120292016 Vortex Controlled Variable Flow Resistance Device and Related Tools and Methods
11/22/2012CA2835322A1 Shear valve
11/21/2012EP2524108A1 Internal blow out preventer
11/21/2012CN202544824U Concentric double-pipe hierarchical injection pipe column
11/21/2012CN202544812U Rotary oil draining device
11/21/2012CN202544811U Double-stage constant pressure type oil pipe constant pressure device
11/21/2012CN202544810U Drillable automatic grouting float collar
11/21/2012CN202544809U Check valve on ground of oil producing well
11/21/2012CN202544808U Anti-theft emission-reducing sleeve placement device
11/21/2012CN202544807U Oil-fishing shearing sealing blowout preventer
11/21/2012CN202544806U High-pressure valve state identification device
11/21/2012CN202544805U Intelligent micro steady-flow water distribution valve group
11/21/2012CN202544804U Pressing ring with inverted Z-shaped opening
11/21/2012CN102791956A Valve system
11/21/2012CN102787834A Electric control fracturing switch with secondary driving device and control method of electric control fracturing switch
11/21/2012CN102787826A Magnetic float collar float shoe
11/21/2012CN101832120B Bidirectional slip insert mechanical casing valve
11/20/2012CA2735427C Remote actuation of downhole well tools
11/20/2012CA2473372C Two string drilling system using coil tubing
11/15/2012WO2012154686A1 Downhole shifting tool
11/15/2012WO2012154167A1 Pressure and flow control in drilling operations
11/15/2012WO2012154058A1 Mandrel arrangement and method of operating same
11/15/2012WO2012154056A1 Valve stem seal arrangement
11/15/2012WO2012125454A3 Pressure coring assembly and method
11/15/2012WO2012125261A3 Flow control screen assembly having remotely disabled reverse flow control capability
11/15/2012WO2012085556A3 Downhole apparatus and method
11/15/2012US20120285744 Pressure and flow control in drilling operations
11/15/2012US20120285702 System and method for actuating tools downhole
11/15/2012US20120285687 Selective fracturing tool
11/15/2012CA2835238A1 Downhole shifting tool
11/15/2012CA2832720A1 Pressure and flow control in drilling operations
11/14/2012EP2522997A1 Monitoring hydrocarbon fluid flow
11/14/2012EP2521840A1 Process and apparatus to improve reliability of pinpoint stimulation operations
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