| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 02/25/2010 | US20100044044 Controlling transient underbalance in a wellbore |
| 02/25/2010 | CA2734871A1 Annulus isolation valve |
| 02/24/2010 | EP2156009A2 Improved activation device |
| 02/24/2010 | CN201412119Y Sand-setting type reversed check valve |
| 02/24/2010 | CN201412118Y Switchable safe inner plug cock ball valve |
| 02/24/2010 | CN201412117Y High temperature high pressure reverse circulation safe inner plug cock ball valve |
| 02/24/2010 | CN201412116Y Electromagnetic-pneumatic on/off valve for gas well |
| 02/24/2010 | CN201412115Y Front-mounted bypass valve of screw drill |
| 02/24/2010 | CN201412114Y Mine flameproof minor-caliber electric valve |
| 02/24/2010 | CN201412112Y Dual-Faner well cementing tool for well completion by expansible sleeve |
| 02/24/2010 | CN201412095Y Two-way well flushing valve for horizontal well |
| 02/24/2010 | CN101657604A Distortion compensation for rod piston bore in subsurface safety valves |
| 02/23/2010 | US7665545 Pressure controlled downhole operations |
| 02/23/2010 | US7665543 Permanent downhole deployment of optical sensors |
| 02/23/2010 | US7665536 System and method for preventing cross-flow between formations of a well |
| 02/23/2010 | US7665529 Lubricator valve with rotational flip-flap arm |
| 02/23/2010 | US7665528 Frangible flapper valve with hydraulic impact sleeve and method of breaking |
| 02/23/2010 | US7665527 Providing a rechargeable hydraulic accumulator in a wellbore |
| 02/23/2010 | US7665526 System and method for downhole operation using pressure activated and sleeve valve assembly |
| 02/18/2010 | WO2010019432A1 System and method for controlling a downhole actuator |
| 02/18/2010 | WO2009137729A3 Choke trim assembly |
| 02/18/2010 | WO2009134544A3 Downhole barrier valve |
| 02/18/2010 | WO2009129307A4 Multi-section tree completion system |
| 02/18/2010 | US20100038093 Flow control valve platform |
| 02/18/2010 | US20100038092 System and method for controlling a downhole actuator |
| 02/18/2010 | CA2733793A1 A controller for a downhole tool |
| 02/17/2010 | EP2153017A1 Tubing hanger with integral annulus shutoff valve |
| 02/17/2010 | EP2153015A1 Downhole flow control tool and method |
| 02/17/2010 | CN201407011Y Inner slide sleeve-type downhole switch |
| 02/17/2010 | CN201407010Y Thimble-type oil draining device |
| 02/11/2010 | US20100032162 Fill up and circulation tool and mudsaver valve |
| 02/11/2010 | US20100032155 Formation saver sub and method |
| 02/10/2010 | EP2151539A1 Electrically operated well tools |
| 02/10/2010 | EP1355169B1 Method and apparatus for controlling chemical injection of a surface treatment system |
| 02/10/2010 | CN101646839A Tubing pressure insensitive control system |
| 02/09/2010 | US7658229 Gas lift chamber purge and vent valve and pump systems |
| 02/04/2010 | WO2010014697A2 Subsea well intervention systems and methods |
| 02/04/2010 | WO2010014398A2 Electric wireline insert safety valve |
| 02/04/2010 | US20100025045 Electric Wireline Insert Safety Valve |
| 02/04/2010 | CA2730652A1 Subsea well intervention systems and methods |
| 02/03/2010 | CN201396140Y Cluster well automatic well-selecting on-line metering liquid inlet tee joint |
| 02/03/2010 | CN201396114Y Plug valve special for under-balanced drilling |
| 02/03/2010 | CN201396113Y Circlip type sliding sleeve oil drain |
| 02/03/2010 | CN201396112Y Large-latus rectum underground test valve |
| 02/03/2010 | CN201396111Y Automatic air evacuation valve of pumping well |
| 02/03/2010 | CN201396110Y Oil-water well wellhead simple hand wheel |
| 02/02/2010 | US7654333 Downhole safety valve |
| 02/02/2010 | US7654331 Method and apparatus for reduction of control lines to operate a multi-zone completion |
| 01/28/2010 | WO2010011461A1 A tool using outputs of sensors responsive to signaling |
| 01/28/2010 | US20100018714 Tool using outputs of sensors responsive to signaling |
| 01/27/2010 | EP2147188A2 Device of a test plug |
| 01/27/2010 | CN201391331Y Integral in-hole drilling tool for drilling slotting punched hole of coal seam |
| 01/27/2010 | CN201391295Y Oil well watering regulator |
| 01/27/2010 | CN201391293Y Water injection well water yield adjusting device |
| 01/27/2010 | CN201391284Y Multifunctional oil drain device |
| 01/27/2010 | CN201391277Y Electrically controlled surface blowout preventer control rotary valve |
| 01/27/2010 | CN201391276Y Rotary type oil drainage device |
| 01/27/2010 | CN201391275Y Hot-washing water-creep combination valve |
| 01/27/2010 | CN201391274Y Anti-theft valve used for well site technology |
| 01/27/2010 | CN201391273Y Multifunctional burglar-proof oil well valve |
| 01/27/2010 | CN201391272Y Flooding well wellhead single-flow valve |
| 01/27/2010 | CN201391264Y Wellhead anti-theft and anti-blowout device |
| 01/26/2010 | US7650945 Inflatable closure system |
| 01/26/2010 | US7650943 Hydraulic control system |
| 01/26/2010 | CA2517408C Piloting actuator valve for subterranean flow control |
| 01/26/2010 | CA2441748C Circulation control device within a well bore |
| 01/21/2010 | WO2010008958A2 A method and downhole tool actuator |
| 01/21/2010 | WO2010007403A1 Well tool |
| 01/21/2010 | WO2009111192A4 Multi-cycle single line switch |
| 01/21/2010 | US20100012383 High productivity core drilling system |
| 01/21/2010 | US20100012329 Casing mandrel for facilitating well completion, re-completion or workover |
| 01/21/2010 | US20100012328 Gate Valve and Method of Controlling Pressure During Casing-While-Drilling Operations |
| 01/21/2010 | US20100012326 Lightweight and compact subsea intervention package and method |
| 01/21/2010 | US20100012318 Completion assembly |
| 01/21/2010 | US20100012313 Downhole piezoelectric devices |
| 01/21/2010 | CA2730494A1 A method and downhole tool actuator |
| 01/20/2010 | EP2146049A2 Autonomous inflow restrictors for use in a subterranean well |
| 01/20/2010 | EP2145076A1 Methods and devices for treating multiple-interval well bores |
| 01/20/2010 | CN201386539Y Fracture used high-pressure sand blast sliding sleeve |
| 01/20/2010 | CN201386538Y Hydraulic control two-way valve bank |
| 01/20/2010 | CN201386507Y Rotary blocking type hydraulic power pulse well-drilling tool |
| 01/20/2010 | CN201386505Y Novel valve-type difunctional hydraulic impactor |
| 01/19/2010 | US7647975 Gas lift valve assembly |
| 01/14/2010 | WO2010005632A2 Flow control in a well bore |
| 01/14/2010 | US20100006296 Lock Open and Control System Access Apparatus for a Downhole Safety Valve |
| 01/14/2010 | US20100006295 Pressure relief actuated valves |
| 01/14/2010 | US20100006294 Well bore fluid redistribution and fluid disposal in wellbore environments |
| 01/14/2010 | US20100006282 Assembly for pressure control when drilling and method to control pressure when drilling in a formation with unpredictable high formation pressure |
| 01/13/2010 | EP2143875A2 Multi-purpose float |
| 01/13/2010 | EP2142755A2 Oil well completion tool having severable tubings string barrier disc |
| 01/13/2010 | EP2142754A2 Single line sliding sleeve downhole tool assembly |
| 01/13/2010 | CN201381826Y Snubbing oil pipe valve |
| 01/13/2010 | CN201381818Y Well cleaning oil gas anti-theft system |
| 01/12/2010 | US7644774 Selectively activated float equipment |
| 01/12/2010 | US7644772 Ball seat having segmented arcuate ball support member |
| 01/12/2010 | US7644767 Safety valve with flapper/flow tube friction reducer |
| 01/12/2010 | US7644766 Flushing device and method of flushing an annular space |
| 01/12/2010 | US7644756 Oil recovery by injection of steam, carbon dioxide and nitrogen |
| 01/12/2010 | CA2492920C Fast valve actuator and tool provided with same |
| 01/11/2010 | CA2637907A1 System, method and apparatus for lifting formation fluids in a wellbore |