| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 06/12/2008 | WO2008070674A1 Flow restriction apparatus and methods |
| 06/12/2008 | WO2008070409A1 Control line hydrostatic minimally sensitive control system |
| 06/12/2008 | WO2008070051A2 Restriction element trap for use with and actuation element of a downhole apparatus and method of use |
| 06/12/2008 | US20080135255 Valve for equalizer sand screens |
| 06/12/2008 | US20080135225 Formation isolation valve and method of use |
| 06/12/2008 | CA2673102A1 System and method for facilitating downhole operations |
| 06/12/2008 | CA2671444A1 Restriction element trap for use with and actuation element of a downhole apparatus and method of use |
| 06/11/2008 | CN201071707Y Oil gas anti-theft constant-pressure recovery valve of casing tube |
| 06/11/2008 | CN201071706Y Reverse flow valve |
| 06/11/2008 | CN201071705Y Down-hole safety valve |
| 06/11/2008 | CN201071704Y Shaft mouth visible flux valve |
| 06/11/2008 | CN201071703Y High pressure water injection uniflow valve |
| 06/10/2008 | US7385523 Apparatus and method for downhole well equipment and process management, identification, and operation |
| 06/10/2008 | CA2407452C Apparatus and method for locating joints in coiled tubing operations |
| 06/10/2008 | CA2381360C Downhole bypass valve |
| 06/10/2008 | CA2360192C A pipe assembly and lubricating method |
| 06/05/2008 | WO2008067152A2 Lubricator valve with rotational flip-flap arm |
| 06/05/2008 | WO2006133351A3 Method and apparatus for continuously injecting fluid in a wellbore while maintaining safety valve operation |
| 06/05/2008 | US20080128137 Control line hydrostatic minimally sensitive control system |
| 06/04/2008 | EP1926884A2 Sub-surface deployment valve |
| 06/04/2008 | CN201068781Y Down-hole fixed pressure opening valve for injection, extraction and washing |
| 06/04/2008 | CN201068780Y Oil well wellhead tubing drain |
| 06/04/2008 | CN201068773Y Oil well wellhead two stage sealed oil drainage and oil spraying prevention device |
| 06/04/2008 | CN101191410A Oil draining device |
| 06/03/2008 | US7381905 Structure for fixing an electronic device to a substrate |
| 06/03/2008 | CA2480077C Multi-position sliding sleeve valve |
| 06/03/2008 | CA2458433C By-pass valve mechanism and method of use hereof |
| 06/03/2008 | CA2371113C Pump systems and methods |
| 05/29/2008 | WO2008064173A2 Antimicrobial silicone rubber injection port valves |
| 05/29/2008 | WO2008063997A2 Liner hanger and flapper valve and method utilizing same |
| 05/29/2008 | WO2008063947A1 Valve for equalizer sand screens |
| 05/29/2008 | WO2008063073A1 Valve |
| 05/29/2008 | US20080123470 Gas minimization in riser for well control event |
| 05/29/2008 | US20080121400 Direct connecting downhole control system |
| 05/28/2008 | CN201065750Y Oil well oil and gas magnetic control anti-theft valve |
| 05/28/2008 | CN101187301A Coal bed gas wellhead device |
| 05/28/2008 | CA2581581A1 Direct connecting downhole control system |
| 05/27/2008 | US7377327 Variable choke valve |
| 05/27/2008 | US7377321 Testing, treating, or producing a multi-zone well |
| 05/22/2008 | WO2008060889A1 Distortion compensation for rod piston bore in subsurface safety valves |
| 05/22/2008 | WO2008060188A1 Flying valve for a free piston |
| 05/22/2008 | WO2008036570A3 Downhole hydraulic control system with failsafe features |
| 05/22/2008 | CA2669857A1 Flying valve for free piston |
| 05/21/2008 | EP1923535A1 Downhole check valve comprising a burst disk |
| 05/21/2008 | CN201062508Y Subsurface safety valve having plunger type compensation valve |
| 05/21/2008 | CN201062507Y Subsurface safety valve having steel-ball type compensation valve |
| 05/21/2008 | CN201062506Y Casing gas burglarproof inverted valve |
| 05/20/2008 | US7373983 Downhole milling machine and method of use |
| 05/20/2008 | US7373972 Piloting actuator valve for subterranean flow control |
| 05/15/2008 | WO2008056182A1 An underwater apparatus for operating underwater equipment |
| 05/15/2008 | US20080110678 Expandable reamer apparatus for enlarging boreholes while drilling |
| 05/15/2008 | US20080110673 Apparatus and methods for drilling a wellbore using casing |
| 05/15/2008 | US20080110634 Inflatable closure system |
| 05/15/2008 | US20080110632 Downhole lubricator valve |
| 05/15/2008 | US20080110631 Distortion compensation for rod piston bore in subsurface safety valves |
| 05/15/2008 | US20080110615 Downhole trigger device having extrudable time delay material |
| 05/14/2008 | EP1920133A1 Safety device for an oil well and associated safety installation |
| 05/14/2008 | CN201059177Y High-efficiency continuous oil draining device |
| 05/14/2008 | CN201059176Y Water injection well stable metering controller |
| 05/14/2008 | CN101178003A Flechette-type decompression clack-valve for drilling tool |
| 05/13/2008 | USRE40308 Multi-purpose injection and production well system |
| 05/13/2008 | US7370706 Gas lift valve for high pressure operation |
| 05/13/2008 | US7370705 Multiple zone downhole intelligent flow control valve system and method for controlling commingling of flows from multiple zones |
| 05/13/2008 | CA2526102C Lightweight and compact subsea intervention package and method |
| 05/13/2008 | CA2473511C Apparatus for wellbore communication |
| 05/08/2008 | US20080105465 Expandable reamer for subterranean boreholes and methods of use |
| 05/08/2008 | US20080105464 Moveable blades and bearing pads |
| 05/08/2008 | US20080105435 Safety Joint |
| 05/07/2008 | EP1918509A2 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
| 05/07/2008 | CN201057022Y Sliding bush switch |
| 05/07/2008 | CN201057021Y Pressure balanced downhole switch |
| 05/07/2008 | CN201057020Y Pressure-controlled shunting system |
| 05/07/2008 | CN201057019Y Slurry anti-splash valve of square shaft |
| 05/07/2008 | CN201057015Y Control device of electric-controlled ground blowout preventer |
| 05/06/2008 | US7367405 Electric pressure actuating tool and method |
| 05/06/2008 | US7367393 Pressure monitoring of control lines for tool position feedback |
| 05/02/2008 | WO2008050116A1 Downhole apparatus and method |
| 05/01/2008 | US20080099195 Method and apparatus for isolating and testing zones during reverse circulation drilling |
| 04/30/2008 | CN201053317Y Logging device by-pass short joint spray-proof sealing device |
| 04/30/2008 | CN201053301Y Down-hole tubular pile oil draining equipment |
| 04/30/2008 | CN201053300Y Throttle kill manifold |
| 04/29/2008 | US7363982 Subsea well production flow system |
| 04/29/2008 | US7363981 Seal stack for sliding sleeve |
| 04/29/2008 | US7363980 Downhole flow control apparatus, operable via surface applied pressure |
| 04/29/2008 | US7363969 Casing vent security device |
| 04/29/2008 | CA2486091C Controlling a pressure transient in a well |
| 04/29/2008 | CA2428618C Plunger for gas wells |
| 04/29/2008 | CA2362152C A device for controlling flow rate downhole, the device being provided with a protective sleeve for protecting sealing gaskets |
| 04/29/2008 | CA2290894C Well logging tool |
| 04/24/2008 | US20080093124 Apparatus and methods for drilling a wellbore using casing |
| 04/24/2008 | US20080093080 Ball drop circulation valve |
| 04/23/2008 | EP1913232A2 Triple valve blow out preventer |
| 04/23/2008 | CN201050344Y Diameter variable bushing swab |
| 04/23/2008 | CN201050341Y Double safety casing inclined guiding check valve |
| 04/23/2008 | CN201050340Y Double-walled drilling faucet |
| 04/23/2008 | CN201050339Y Down-hole switch for pump recovery well snubbing environment-friendly operation |
| 04/23/2008 | CN201050338Y Ball-controlled anti-wear sliding sleeve tubing drain |
| 04/23/2008 | CN201050337Y Self-temperature controlling type nozzle tip cover |
| 04/23/2008 | CN201050316Y Snubbing environment-friendly operation hydraulic control anchor for water injection well |
| 04/22/2008 | US7360611 Flow system for a hydraulic choke solids strainer |