| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 10/01/2013 | US8544548 Water dissolvable materials for activating inflow control devices that control flow of subsurface fluids |
| 09/26/2013 | WO2013141970A1 Alignment system for flapper valve |
| 09/26/2013 | WO2012149433A3 Annular relief valve |
| 09/26/2013 | US20130248203 Control system for a surface controlled subsurface safety valve |
| 09/26/2013 | US20130248202 Control Mechanism for Subsurface Safety Valve |
| 09/26/2013 | US20130248201 Method and apparatus for actuating a downhole tool |
| 09/26/2013 | US20130248196 High-capacity single-trip lockdown bushing and a method to operate the same |
| 09/26/2013 | US20130248194 Disposable downhole tool |
| 09/26/2013 | US20130248193 System and Method for Delaying Actuation using a Destructible Impedance Device |
| 09/26/2013 | US20130248190 System and Method for Controlling Flow through a Pipe using a Finger Valve |
| 09/26/2013 | US20130248189 System and Method for Fracturing of Oil and Gas Wells |
| 09/26/2013 | US20130248181 Downhole Isolation and Depressurization Tool |
| 09/26/2013 | US20130248030 Valve assembly |
| 09/25/2013 | EP2640930A1 Kobe sub, wellbore tubing string apparatus and method |
| 09/25/2013 | EP2640929A2 Valve assembly |
| 09/25/2013 | CN203214033U Batting sliding sleeve with buffering backstop device |
| 09/25/2013 | CN203214022U Sliding sleeve opening and closing tool |
| 09/25/2013 | CN203214006U Device for under-pressure replacement of wellhead gate valve |
| 09/25/2013 | CN203214005U Anti-theft oil outlet device |
| 09/25/2013 | CN203214004U Solar-powered constant-pressure gas releasing device allowing remote intelligent control |
| 09/25/2013 | CN203213990U Oil extraction well mouth device with leakage valve capable of being replaced safely |
| 09/25/2013 | CN103328762A Fluid injection device |
| 09/25/2013 | CN103321628A Electric intelligent switching sliding sleeve |
| 09/25/2013 | CN103321626A Fracture and sand prevention integrated completion pipe string and application method thereof |
| 09/25/2013 | CN103321625A Rotation-free locking ring type sliding sleeve with ball seat capable of being taken out |
| 09/25/2013 | CN103321624A Threaded sliding sleeve with ball seat capable of being taken out |
| 09/25/2013 | CN103321619A Polymer injection and water injection layered continuously-adjustable injection distribution device |
| 09/25/2013 | CN103321608A Rotation-free pawl-type sliding sleeve with ball seat capable of being taken out |
| 09/25/2013 | CN103321607A Double-layer-cage double-plunger cage throttling valve |
| 09/25/2013 | CN103321604A Packer with safety valve |
| 09/25/2013 | CN102155150B Crushing mechanism with gas inlet pipe |
| 09/24/2013 | US8540019 Fracturing system and method |
| 09/24/2013 | US8540018 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
| 09/24/2013 | CA2683215C Method to provide variability in fluid flow rates in a well |
| 09/24/2013 | CA2401705C Wireless downhole measurement and control for optimizing gas lift well and field performance |
| 09/19/2013 | WO2013137991A1 Actuation lockout system |
| 09/19/2013 | WO2013137933A1 Improved production valve |
| 09/19/2013 | WO2013049122A3 Ball valve float equipment |
| 09/19/2013 | WO2012148839A3 Pressure relief valve |
| 09/19/2013 | US20130240207 Cement retainer and squeeze technique |
| 09/18/2013 | CN203201532U Hydraulic switch for oil and gas well circulation sliding sleeve |
| 09/18/2013 | CN203201531U Oil drain device for electrical submersible progressive cavity pump oil extraction system |
| 09/18/2013 | CN203201530U Oil-field well-mouth double-pipe device |
| 09/18/2013 | CN203201529U Kelly bar plug valve |
| 09/18/2013 | CN203201528U Gas well opening casing pressure burglar alarm |
| 09/18/2013 | CN203201520U High-pressure efficient fracture well head device |
| 09/18/2013 | CN103306638A Pressure-transmitting supporting automatic grouting valve float valve |
| 09/17/2013 | US8534362 Downhole deployment valves |
| 09/17/2013 | US8534361 Multi-stage pressure equalization valve assembly for subterranean valves |
| 09/17/2013 | US8534360 Debris anti-compaction system for ball valves |
| 09/15/2013 | CA2780553A1 Improved valve with shuttle |
| 09/12/2013 | WO2013134013A2 Remotely activated down hole systems and methods |
| 09/12/2013 | WO2013133973A2 Improved segmented seat for wellbore servicing system |
| 09/12/2013 | WO2013133824A1 Thermally induced liquidizing downhole tool |
| 09/12/2013 | WO2013131194A1 Toe circulation sub |
| 09/12/2013 | WO2013034577A3 Flow activated circulating valve |
| 09/12/2013 | WO2012148840A3 Weighted pressure relief valve |
| 09/12/2013 | US20130233570 Remotely Activated Down Hole Systems and Methods |
| 09/12/2013 | US20130233565 Actuation lockout system |
| 09/12/2013 | US20130233564 Segmented seat for wellbore servicing system |
| 09/12/2013 | US20130233563 Well isolation control system and method |
| 09/12/2013 | US20130233557 Bottomhole assembly for capillary injection system |
| 09/12/2013 | US20130233549 System for controlling cement flow in a well |
| 09/12/2013 | US20130233540 System, apparatus and process for collecting balls from wellbore fluids containing sand |
| 09/11/2013 | EP2636842A1 A valve system |
| 09/11/2013 | EP2636840A1 Bottomhole assembly for capillary injection system |
| 09/11/2013 | CN203188984U Three-channel flow string |
| 09/11/2013 | CN203188972U Combination valve for water injecting pipeline |
| 09/11/2013 | CN103299028A Tools and methods for use in completion of a wellbore |
| 09/11/2013 | CN103299027A Rotational test valve with tension reset |
| 09/11/2013 | CN103291271A Fracturing slide sleeve capable of being opened and closed for many times |
| 09/11/2013 | CN103291263A Method and device for hollow water-distribution flow adjusting |
| 09/11/2013 | CN103291243A Double-stage driving circuit of down-hole electromagnetic valve |
| 09/11/2013 | CN103291242A Antifreezing anti-theft fast connecting pressure taking device |
| 09/11/2013 | CN103291241A Gas well remote high-voltage well switching device and control method thereof |
| 09/10/2013 | US8528649 Hydraulic pulse valve with improved pulse control |
| 09/10/2013 | CA2730494C A method and downhole tool actuator |
| 09/07/2013 | CA2807016A1 Bottomhole assembly for capillary injection system |
| 09/06/2013 | WO2013130272A1 Adjustable flow control device |
| 09/06/2013 | WO2013130266A1 High-pressure cap equalization valve |
| 09/06/2013 | WO2013130096A1 Downhole fluid flow control system having pressure sensitive autonomous operation |
| 09/06/2013 | WO2013130057A1 Downhole fluid flow control system and method having a fluidic module with a flow control turbine |
| 09/06/2013 | WO2013129939A1 Dlc-coated gate valve in petroleum production or water injection |
| 09/06/2013 | WO2012112983A3 Apparatus and methods for well completion design to avoid erosion and high friction loss for power cable deployed electric submersible pump systems |
| 09/06/2013 | CA2856828A1 Downhole fluid flow control system having pressure sensitive autonomous operation |
| 09/05/2013 | US20130228342 Apparatus and Methods for Restricting Flow in a Bore |
| 09/05/2013 | US20130228341 Downhole Fluid Flow Control System Having Pressure Sensitive Autonomous Operation |
| 09/05/2013 | US20130228338 Device for Operating Downhole Equipment |
| 09/04/2013 | CN203175527U Underground electric hydraulic control fracturing slide bushing |
| 09/04/2013 | CN203175517U Constant pressure and quantification water discharging device of water injection well |
| 09/04/2013 | CN203175509U Automatic selective-assembly injecting tubular column for air and steam injection |
| 09/04/2013 | CN203175500U Marine non-well-control electric pump lifting technique pipe column |
| 09/04/2013 | CN203175487U Sliding sleeve control tool |
| 09/04/2013 | CN203175486U Electronic tag ball for underground control |
| 09/04/2013 | CN203175485U Sliding sleeve control tool and hydraulically controlled sliding sleeve capable of extending to conduct operation |
| 09/04/2013 | CN203175484U Safety release valve for oil-gas well cable packer |
| 09/04/2013 | CN203175483U Cement-injection circulating valve |
| 09/04/2013 | CN203175482U Quantifying steam distributing valve |
| 09/04/2013 | CN203175481U Strutting-type flat gate valve |
| 09/04/2013 | CN203175480U Internal-pressure type RDS circulating valve |