| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 01/12/2011 | CN201705291U Hot washing wax cleaning underground check valve of hollow sucker rod |
| 01/12/2011 | CN201705290U Novel constant pressure relief valve |
| 01/12/2011 | CN201705289U Large-path combined floating valve for drilling tool |
| 01/12/2011 | CN201705288U One-way check ball valve for oil wellhead |
| 01/12/2011 | CN201705287U Anti-backflow lubricating nipple of pumping well mouth |
| 01/12/2011 | CN201705286U Double-stem gate valve of thermal production well head |
| 01/12/2011 | CN201705285U Gate valve for testing |
| 01/12/2011 | CN201705283U Leaking stoppage device for drilling fixed points |
| 01/12/2011 | CN201705266U Coalbed gas wellhead device for exhausting coal water and gas and injecting water |
| 01/12/2011 | CN201705218U Tubing string with thick oil underground returning thermal production blockage technique |
| 01/12/2011 | CN101120152B Equalizing flapper for high slam rate applications |
| 01/11/2011 | US7866402 Circulation control valve and associated method |
| 01/11/2011 | US7866401 Safety valve for use in an injection well |
| 01/11/2011 | US7866400 Phase-controlled well flow control and associated methods |
| 01/11/2011 | US7866397 Activating mechanism for controlling the operation of a downhole tool |
| 01/11/2011 | US7866396 Systems and methods for completing a multiple zone well |
| 01/06/2011 | WO2011002682A2 Remotely controllable manifold |
| 01/06/2011 | WO2011002680A2 Tubular valving system and method |
| 01/06/2011 | WO2011002678A2 Modular valve body and method of making |
| 01/06/2011 | WO2011002676A2 Tubular valve system and method |
| 01/06/2011 | WO2011002646A2 Remotely controllable variable flow control configuration and method |
| 01/06/2011 | WO2011002615A2 Flow control device with one or more retrievable elements |
| 01/06/2011 | WO2011002562A1 Plunger lift systems and methods |
| 01/06/2011 | WO2010101752A4 Subterranean screen with varying resistance to flow |
| 01/06/2011 | WO2009098512A3 Apparatus and method for controlling the flow of downhole fluids |
| 01/06/2011 | WO2009056840A3 Subsea assembly |
| 01/06/2011 | US20110004352 Control logic method and system for optimizing natural gas production |
| 01/06/2011 | US20110000684 Flow control device with one or more retrievable elements |
| 01/06/2011 | US20110000680 Remotely controllable variable flow control configuration and method |
| 01/06/2011 | US20110000679 Tubular valve system and method |
| 01/06/2011 | US20110000675 Flow control device and method for a downhole oil-water separator |
| 01/06/2011 | US20110000674 Remotely controllable manifold |
| 01/06/2011 | US20110000662 Motion Transfer from a Sealed Housing |
| 01/06/2011 | CA2767109A1 Flow control device with one or more retrievable elements |
| 01/06/2011 | CA2763511A1 Plunger lift systems and methods |
| 01/05/2011 | EP2147188B1 Device of a test plug |
| 01/05/2011 | EP2087200B1 Valve for equalizer sand screens |
| 01/05/2011 | CN201696025U Liquid phase metering valve of oil extraction metering device |
| 01/05/2011 | CN201696016U Quantitative and adjustable sleeve throttling valve for extracting oil and gas |
| 01/05/2011 | CN201695995U Sand settling type bottom ball |
| 01/05/2011 | CN201695994U Oil extraction metering manifold lower end metering valve |
| 01/05/2011 | CN201695993U Manifold valve at lower end of oil extracting and metering manifold |
| 01/05/2011 | CN201695992U Dedicated manifold for tightness detection of well-control device |
| 01/05/2011 | CN101936145A Ball valve type oil reservoir protective valve and operation method thereof |
| 01/04/2011 | US7861788 Casing valves system for selective well stimulation and control |
| 01/04/2011 | US7861774 Method and apparatus for wellbore fluid treatment |
| 01/04/2011 | US7861772 Packer retrieving mill with debris removal |
| 01/04/2011 | CA2528130C Method and apparatus for stimulating hydrocarbon wells |
| 01/04/2011 | CA2465673C Bulged single-hinged scored rupture disc having a non-circular varying depth score line |
| 12/29/2010 | WO2010149644A1 A completion assembly for stimulating, segmenting and controlling erd wells |
| 12/29/2010 | WO2010149643A1 A completion assembly and a method for stimulating, segmenting and controlling erd wells |
| 12/29/2010 | WO2010101775A3 Circulation control valve and associated method |
| 12/29/2010 | EP2265794A2 Bellows valve |
| 12/29/2010 | CN201687452U Injection tool for slim-hole well borehole operation |
| 12/29/2010 | CN201687435U Annular relief valve |
| 12/29/2010 | CN201687434U Ball type drill rod check valve for well repair |
| 12/29/2010 | CN201687433U Drilling and production integrated cross joint |
| 12/29/2010 | CN201687432U Oil casing ring empty oil anti-theft check valve in oil well |
| 12/29/2010 | CN101929320A Power swivel |
| 12/28/2010 | US7857062 Configurable wellhead system with permanent fracturing spool and method of use |
| 12/28/2010 | US7857061 Flow control in a well bore |
| 12/23/2010 | WO2010148301A2 Downhole tools and methods of setting in a wellbore |
| 12/23/2010 | WO2010147960A2 Frac sleeve system and method |
| 12/23/2010 | WO2010147852A1 Compliant dart-style reverse-flow check valve |
| 12/23/2010 | WO2010145004A1 Method and apparatus for sealing and venting pressurized casings of gas wells |
| 12/23/2010 | WO2009020711A3 Flapper operating system without a flow tube |
| 12/23/2010 | US20100319934 Downhole tools and methods of setting in a wellbore |
| 12/23/2010 | US20100319928 Through tubing intelligent completion and method |
| 12/23/2010 | US20100319927 Downhole Tool with Hydraulic Closure Seat |
| 12/23/2010 | US20100319924 Compliant dart-style reverse-flow check valve |
| 12/23/2010 | CA2765581A1 Compliant dart-style reverse-flow check valve |
| 12/23/2010 | CA2763799A1 Downhole tools and methods of setting in a wellbore |
| 12/22/2010 | EP2262977A1 Systems, assemblies and processes for controlling tools in a well bore |
| 12/22/2010 | CN201679477U Check valve of electric-pump oil production well |
| 12/22/2010 | CN201679476U Integrated combination valve |
| 12/22/2010 | CN201679472U Anti-theft oil-well killable packer |
| 12/17/2010 | CA2669254A1 Backup safety flow control system for concentric drill string |
| 12/16/2010 | WO2010144699A2 Delay activated valve and method |
| 12/16/2010 | WO2010144593A2 Dual acting rod piston control system |
| 12/16/2010 | WO2010144580A2 Seat apparatus and method |
| 12/16/2010 | WO2010120191A3 Sealing arrangement for a down hole valve |
| 12/16/2010 | WO2006083717A3 Packer with positionable collar |
| 12/16/2010 | US20100314174 Flow diverter for drilling |
| 12/16/2010 | US20100314126 Seat apparatus and method |
| 12/16/2010 | US20100314120 Dual Acting Rod Piston Control System |
| 12/16/2010 | CA2764756A1 Debris removal method and assembly |
| 12/16/2010 | CA2733828A1 Seat apparatus and method |
| 12/15/2010 | EP2261457A2 Method and apparatus for drilling a borehole into a subsea abnormal pore pressure environment |
| 12/15/2010 | EP2261456A2 Method and apparatus for drilling a borehole into a subsea abnormal pore pressure environment |
| 12/15/2010 | EP2260175A1 Well plug |
| 12/15/2010 | EP2260174A2 Flow stop valve |
| 12/15/2010 | EP1606526B1 Method for preventing critical annular pressure buildup |
| 12/15/2010 | CN201671599U Mechanical casing valve with bidirectional slip inserts |
| 12/15/2010 | CN201671598U Mechanical underbalance downhole casing valve |
| 12/15/2010 | CN201671597U Double-electromagnetic-head instantaneous electrification switching-on or switching-off device |
| 12/15/2010 | CN201671596U Outer sleeve corbula-type throttle valve |
| 12/15/2010 | CN201671595U Float self-seal type wellhead water injection valve |
| 12/15/2010 | CN201671594U Gusher de-plugging device without removing glib |
| 12/15/2010 | CN201671593U Upper cock shutting control device |
| 12/15/2010 | CN201671589U Oilfield injection well plug |