| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 04/14/2010 | EP2173968A2 Producing resources using heated fluid injection |
| 04/14/2010 | CN201437717U Underground sand-prevention throttleer |
| 04/14/2010 | CN201437712U Fast-assembly two-way dual-purpose oil pipe plug valve |
| 04/14/2010 | CN201437711U Check valve body of water injection well wellhead |
| 04/14/2010 | CN101694152A Multi-level fine choke manifold and automatic control system |
| 04/14/2010 | CA2641778A1 Method and apparatus for use in selectively fracing a well |
| 04/13/2010 | US7694742 Downhole hydraulic control system with failsafe features |
| 04/08/2010 | WO2010040095A2 Downhole ball mechanism with enhanced drift clearance |
| 04/08/2010 | WO2010039511A2 Subsea system and method for protecting equipment of a subsea system |
| 04/08/2010 | WO2010039043A1 Downhole tool unit |
| 04/08/2010 | WO2010039042A2 Down hole valve device |
| 04/08/2010 | WO2009151684A3 Temperature triggered actuator |
| 04/08/2010 | US20100084139 Downhole Waterflood Regulator |
| 04/08/2010 | US20100084138 Downhole Ball Mechanism With Enhanced Drift Clearance |
| 04/07/2010 | EP2171208A2 Flapper operating system without a flow tube |
| 04/07/2010 | CN101691835A Layered high-pressure high-resolution adjustable water injection valve in oilfield |
| 04/07/2010 | CN101691833A Mounting method and mounting device for replacing valve under pressure |
| 04/06/2010 | US7690437 Methods and apparatus for well construction |
| 04/06/2010 | US7690432 Apparatus and methods for utilizing a downhole deployment valve |
| 04/06/2010 | CA2596383C Underbalanced downhole casing valve and force open tool thereof |
| 04/06/2010 | CA2498694C Downhole ball dropping apparatus |
| 04/01/2010 | WO2010008958A3 A method and downhole tool actuator |
| 04/01/2010 | WO2009009281A3 Incremental annular choke |
| 04/01/2010 | US20100078175 Hydraulic Control System |
| 04/01/2010 | US20100078164 Permanent downhole deployment of optical sensors |
| 04/01/2010 | US20100078161 Electrical control for a downhole system |
| 03/31/2010 | EP2167786A1 Sleeve valve |
| 03/31/2010 | CN201433738Y Counterbalance valve and fetching device thereof |
| 03/31/2010 | CN201433735Y Packer special for plugging water |
| 03/31/2010 | CN101688441A Producing resources using heated fluid injection |
| 03/31/2010 | CN101688440A Gas valve and production tubing with a gas valve |
| 03/31/2010 | CN101688439A Christmas tree with internally positioned flowmeter |
| 03/31/2010 | CN101684724A Snubbing downhole control valve |
| 03/30/2010 | CA2499901C Remote intervention logic valving method and apparatus |
| 03/25/2010 | WO2010032019A1 Subsea apparatus |
| 03/25/2010 | US20100071913 Well bore control valve |
| 03/25/2010 | US20100071896 Downhole apparatus and method |
| 03/25/2010 | US20100071891 Apparatus For Pumping Fluids From A Well |
| 03/25/2010 | CA2737381A1 Subsea apparatus |
| 03/24/2010 | CN201428429Y Anti-clogging arrow back pressure valve |
| 03/24/2010 | CN201428428Y Sand setting type flushing valve |
| 03/24/2010 | CN201428427Y Single flash-board thermal-production flat-plate gate valve |
| 03/24/2010 | CN201428395Y Ball-injection-free pressure building joint |
| 03/24/2010 | CN201428387Y Energy-saving oil pump |
| 03/23/2010 | US7681666 Expandable reamer for subterranean boreholes and methods of use |
| 03/23/2010 | US7681650 Valve seat |
| 03/23/2010 | US7681645 System and method for stimulating multiple production zones in a wellbore |
| 03/18/2010 | WO2010030266A1 Remote actuation of downhole well tools |
| 03/18/2010 | WO2009134578A3 Drilling system with drill string valves |
| 03/18/2010 | WO2009113875A3 Bellows valve |
| 03/18/2010 | US20100065281 Shoe for wellbore lining tubing |
| 03/18/2010 | US20100065276 Method and apparatus for wellbore fluid treatment |
| 03/17/2010 | CN101675212A Improved system and method for stimulating multiple production zones in a wellbore |
| 03/17/2010 | CN101675210A Rupture disc assembly that withstands much higher back pressures than actuation pressure |
| 03/17/2010 | CN101672174A Energy-saving uninterrupted non-rod oil pumping device |
| 03/16/2010 | US7677319 Subsea tree cap and method for installing the subsea tree cap |
| 03/16/2010 | CA2448419C Instrumentation for a downhole deployment valve |
| 03/11/2010 | WO2010027902A1 Fluid isolating pressure equalization in subterranean well tools |
| 03/11/2010 | WO2010027738A2 System for selective incremental closing of a hydraulic downhole choking valve |
| 03/11/2010 | WO2010027737A2 Fracture valve and equalizer system and method |
| 03/11/2010 | WO2009123805A3 Methods and devices for isolating wellhead pressure |
| 03/11/2010 | CA2734813A1 Fracture valve and equalizer system and method |
| 03/10/2010 | CN201420551Y Bidirectional seal antifreezing sampling valve device |
| 03/10/2010 | CN201420550Y Theft-proof sampler for oil wells |
| 03/10/2010 | CN201420536Y Well completion sliding sleeve fracturing valve |
| 03/10/2010 | CN201420535Y Valve core of bypass valve of screw drill |
| 03/10/2010 | CN201420534Y Kelly cock valve |
| 03/10/2010 | CN201420533Y Blowout prevention valve |
| 03/10/2010 | CN201420532Y Forced circulating valve used under absorption well and sand washing well |
| 03/10/2010 | CN201420531Y Self-locking type closed multi-valve bank joint |
| 03/10/2010 | CN201420530Y Novel check valve |
| 03/09/2010 | US7673708 Ball-activated mechanism for controlling the operation of a downhole tool |
| 03/09/2010 | US7673689 Dual flapper barrier valve |
| 03/09/2010 | US7673680 Method for signalling a downhole device in a flowing well |
| 03/09/2010 | US7673677 Reusable ball seat having ball support member |
| 03/09/2010 | CA2646556C Casing shoes and methods of reverse-circulation cementing of casing |
| 03/04/2010 | WO2010024818A1 Bypass of damaged lines in subterranean wells |
| 03/04/2010 | WO2010024687A1 Valve for wellbore applications |
| 03/04/2010 | WO2009131753A3 System and method for controlling flow in a wellbore |
| 03/04/2010 | WO2006051250A8 Remote actuation of a downhole tool |
| 03/04/2010 | US20100051291 Fracture valve and equalizer system and method |
| 03/04/2010 | US20100051290 Pressure Actuated Piston Type Casing Fill-up Valve and Methods of Use Thereof |
| 03/04/2010 | US20100051289 System for Selective Incremental Closing of a Hydraulic Downhole Choking Valve |
| 03/04/2010 | US20100051288 Low Rate Gas Injection System |
| 03/04/2010 | US20100051286 Optical sensing system for wellhead equipment |
| 03/04/2010 | US20100051285 Passable no-go device for downhole valve |
| 03/04/2010 | US20100051284 Valve trigger for downhole tools |
| 03/04/2010 | US20100051260 Fluid Isolating Pressure Equalization in Subterranean Well Tools |
| 03/04/2010 | CA2735086A1 Valve for wellbore applications |
| 03/03/2010 | EP2159370A2 Passable no-go device for downhole valve |
| 03/03/2010 | EP2159369A2 Christmas tree with internally positioned flowmeter |
| 03/03/2010 | CN201416445Y Polymer injection well head sampler |
| 03/03/2010 | CN201416427Y Selective production string |
| 03/03/2010 | CA2677486A1 Gas flow system |
| 03/02/2010 | US7669661 Thermally expansive fluid actuator devices for downhole tools and methods of actuating downhole tools using same |
| 02/27/2010 | CA2639151A1 Cage valve with erosion control |
| 02/25/2010 | WO2010022170A1 Annulus isolation valve |
| 02/25/2010 | WO2009154641A3 Subsurface safety valve for electric subsea tree |
| 02/25/2010 | US20100044054 Drill String Control Valves and Methods |
| 02/25/2010 | US20100044053 Method and an apparatus for cold start of a subsea production system |