| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 04/20/2011 | CN201802338U Dual-string oil production wellhead device for branch horizontal well |
| 04/20/2011 | CN102027191A Downhole valve for preventing zonal cross-flow |
| 04/20/2011 | CN102027190A A sub sea hybrid valve actuator system and method |
| 04/20/2011 | CN102022095A Wellhead quantitative watering valve |
| 04/19/2011 | US7926580 Coiled tubing multi-zone jet frac system |
| 04/19/2011 | US7926575 Hydraulic lockout device for pressure controlled well tools |
| 04/19/2011 | US7926574 Fluid actuated circulating sub |
| 04/19/2011 | US7926573 Circulation control valve and associated method |
| 04/19/2011 | US7926572 Ballistically compatible backpressure valve |
| 04/19/2011 | US7926571 Cemented open hole selective fracing system |
| 04/19/2011 | US7926569 Bypass device for wellbores |
| 04/19/2011 | CA2497463C Ball operated by-pass tool for use in drillstring |
| 04/14/2011 | WO2011044483A2 Downhole tool actuation devices and methods |
| 04/14/2011 | WO2011044074A2 Active integrated completion installation system and method |
| 04/14/2011 | WO2011043953A2 Multi-stage pressure equalization valve assembly of subterranean valves |
| 04/14/2011 | WO2011043931A2 Downhole valve |
| 04/14/2011 | WO2011043872A2 Multi-point chemical injection system for intelligent completion |
| 04/14/2011 | WO2011002682A3 Remotely controllable manifold |
| 04/14/2011 | WO2011002680A3 Tubular valving system and method |
| 04/14/2011 | WO2011002678A3 Modular valve body and method of making |
| 04/14/2011 | WO2010123585A3 New and improved blapper valve tools and related methods |
| 04/14/2011 | US20110083859 Downhole valve |
| 04/14/2011 | US20110083858 Downhole tool actuation devices and methods |
| 04/14/2011 | US20110083857 Repeatable, compression set downhole bypass valve |
| 04/14/2011 | US20110083856 Sensor deployment and retrieval system using fluid drag force |
| 04/14/2011 | US20110083855 Gas Injection Control Devices and Methods of Operation Thereof |
| 04/14/2011 | CA2848449A1 Interchangeable drillable tool |
| 04/13/2011 | CN201794572U Solar high-temperature heat pump heating device for oil production system |
| 04/13/2011 | CN201794563U Selective production string optionally adjustable within four layers |
| 04/13/2011 | CN201794553U Underground switch well valve for coal bed gas well testing device |
| 04/13/2011 | CN201794548U Internally eccentric gas-lift working barrel |
| 04/13/2011 | CN102016373A Gate valve actuator and method |
| 04/13/2011 | CN102016226A Internal tree cap and ITC running tool |
| 04/13/2011 | CN102011569A Well assembly with removable fluid restricting member |
| 04/13/2011 | CN101148977B Oil-tube draining device |
| 04/12/2011 | US7921922 Formation saver sub and method |
| 04/12/2011 | US7921915 Removable injection or production flow equalization valve |
| 04/12/2011 | US7921908 Gas restrictor for horizontally oriented pump |
| 04/07/2011 | WO2011041674A2 Flow control device that substantially decreases flow of a fluid when a property of the fluid is in a selected range |
| 04/07/2011 | WO2011041525A2 Method and system for running subsea test tree and control system without conventional umbilical |
| 04/07/2011 | WO2011005517A3 Through tubing intelligent completion and method |
| 04/07/2011 | WO2010144580A3 Seat apparatus and method |
| 04/07/2011 | US20110079399 Hydra-Connector |
| 04/07/2011 | US20110079398 Multi-point chemical injection system for intelligent completion |
| 04/07/2011 | US20110079394 Multi-stage Pressure Equalization Valve Assembly for Subterranean Valves |
| 04/07/2011 | US20110079393 Circulation control valve and associated method |
| 04/06/2011 | EP2201213B1 Oil field system for through tubing rotary drilling |
| 04/06/2011 | CN201786357U Overflow type sampler |
| 04/06/2011 | CN201786323U Automatic casing air discharge device for preventing oil blowout |
| 04/06/2011 | CN201786322U Antitheft wellhead shifter |
| 04/06/2011 | CN201786311U Drilling gas blowout preventor |
| 04/06/2011 | CN201786308U Combination plugging device for replacing gate valve under pressure |
| 04/06/2011 | CN102003177A Hydrogeological parameter observation instrument for underground single drill hole |
| 04/05/2011 | US7918276 System and method for creating a gravel pack |
| 04/05/2011 | US7918275 Water sensitive adaptive inflow control using couette flow to actuate a valve |
| 04/05/2011 | CA2512641C Apparatus and methods for drilling a wellbore using casing |
| 03/31/2011 | WO2011008522A3 System and method for intermittent gas lift |
| 03/31/2011 | WO2011002676A3 Tubular valve system and method |
| 03/31/2011 | WO2011002646A3 Remotely controllable variable flow control configuration and method |
| 03/31/2011 | WO2011002615A3 Flow control device with one or more retrievable elements |
| 03/31/2011 | WO2010148301A3 Downhole tools and methods of setting in a wellbore |
| 03/31/2011 | WO2010147960A3 Frac sleeve system and method |
| 03/31/2011 | WO2010144699A3 Delay activated valve and method |
| 03/31/2011 | WO2010144593A3 Dual acting rod piston control system |
| 03/31/2011 | WO2010001087A3 Apparatus and method for inflow control |
| 03/31/2011 | US20110073322 Gas lift plunger acceleration arrangement |
| 03/31/2011 | US20110073321 Tubular actuator and method |
| 03/31/2011 | US20110073320 Tubular actuator and method |
| 03/31/2011 | US20110073313 Device for fixing a valve to a tubular member |
| 03/31/2011 | US20110073312 Debris protection for sliding sleeve |
| 03/31/2011 | US20110073295 Phase-controlled well flow control and associated methods |
| 03/30/2011 | CN201778790U Ground pressure reducing device for oil well |
| 03/30/2011 | CN201778767U Integrated pipe string for looking for water proofing, water plugging, acidification and plugging breaking |
| 03/30/2011 | CN201778759U Underground tubing-casing annulus pressure-reducing device |
| 03/30/2011 | CN201778758U Coiled tubing back-pressure valve |
| 03/30/2011 | CN201778757U Internal production tree cap of subsea production tree |
| 03/30/2011 | CN201778756U Movable assister bar |
| 03/30/2011 | CN201778755U Wellhead guiding nozzle of flowing well |
| 03/30/2011 | CN201778754U Underwater valve used hydraulic trigger |
| 03/30/2011 | CN201778753U Two-way valve |
| 03/30/2011 | CN201778734U Cable penetration device of tubing hanger of subsea production tree |
| 03/30/2011 | CN201778730U Vertical subsea production tree |
| 03/30/2011 | CN201778729U Anti-freezing choke plug |
| 03/29/2011 | US7913770 Controlled pressure equalization of atmospheric chambers |
| 03/29/2011 | US7913769 Downhole safety valve apparatus and method |
| 03/29/2011 | US7913766 Method for reduction of control lines to operate a multi-zone completion |
| 03/29/2011 | US7913765 Water absorbing or dissolving materials used as an in-flow control device and method of use |
| 03/29/2011 | US7913603 Device and methods for firing perforating guns |
| 03/29/2011 | CA2670569C Snorkel device for flow control |
| 03/29/2011 | CA2536900C Control system communication and lock open tool and method for locking open a safety valve and communicating with surface |
| 03/29/2011 | CA2531301C System and method for completing a subterranean well |
| 03/24/2011 | WO2011034695A2 Fracturing and gravel packing tool with multi movement wash pipe valve |
| 03/24/2011 | WO2011034694A2 Fracturing and gravel packing tool with shifting ability between squeeze and circulate while supporting an inner string assembly in a single position |
| 03/24/2011 | WO2011033257A1 Downhole measurement apparatus |
| 03/24/2011 | WO2009155268A3 Positive sidewall core sample identification system |
| 03/24/2011 | US20110067886 Inflow control device and methods for using same |
| 03/24/2011 | US20110067879 Bellows Valve |
| 03/24/2011 | US20110067878 Flow controller device |
| 03/24/2011 | US20110067876 Method and apparatus for injecting fluid in a wellbore |
| 03/24/2011 | US20110067862 Fracturing and Gravel Packing Tool with Multi Movement Wash Pipe Valve |