| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 03/08/2006 | CN2763491Y Production calibrating pressure setting device in oil well site |
| 03/08/2006 | CN2763490Y Valve for sampling in bore top for pumping well |
| 03/08/2006 | CN2763486Y Freezing-resisting theft-proof bore top device for oil production |
| 03/08/2006 | CN2763457Y Normal open check valve in bottom of whipstock |
| 03/07/2006 | US7007913 Rotating blowout preventer with independent cooling circuits and thrust bearing |
| 03/07/2006 | CA2153250C Method and apparatus for gravel packing a well |
| 03/02/2006 | US20060042798 Casing shoes and methods of reverse-circulation cementing of casing |
| 03/01/2006 | EP1511914A4 Equalizer valve and method of use |
| 03/01/2006 | CN2761835Y Pipe controlling hydraulic layer changing switch |
| 03/01/2006 | CN2761834Y Blow-out prevention valve during drilling |
| 03/01/2006 | CN2761833Y Antitheft device for wellhead integrated valve |
| 03/01/2006 | CN2761832Y New type well head fixed pressure air releasing valve |
| 02/28/2006 | US7004444 Rotating blowout preventer with independent cooling circuits and thrust bearing |
| 02/28/2006 | US7004258 Method and apparatus for enhancing oil and gas flow in a well |
| 02/28/2006 | CA2683219A1 Method to control a main valve in a well |
| 02/28/2006 | CA2683215A1 Method to provide variability in fluid flow rates in a well |
| 02/22/2006 | EP1627989A1 Flow control device |
| 02/22/2006 | EP1627988A1 Flow control device |
| 02/22/2006 | EP1627987A1 Flow control device |
| 02/22/2006 | CN1737331A 自卸压球座 Since relief tee |
| 02/21/2006 | US7000890 Pressure compensated shear seal solenoid valve |
| 02/21/2006 | US7000698 Methods and systems for optical endpoint detection of a sliding sleeve valve |
| 02/16/2006 | US20060032634 Downhole surge pressure reduction and filtering apparatus |
| 02/15/2006 | EP1626156A1 Recovery of production fluids from an oil or gas well |
| 02/15/2006 | EP1009907B1 Apparatus and method for determining integrity of oil well tubing |
| 02/15/2006 | CN2758525Y Anti-pump gas locking device of oil well tail pipe |
| 02/15/2006 | CN2758461Y Under well multifunction valve |
| 02/15/2006 | CN2758460Y Layered acidification drain valve |
| 02/14/2006 | US6998724 Power generation system |
| 02/14/2006 | US6997263 Multi zone isolation tool having fluid loss prevention capability and method for use of same |
| 02/14/2006 | US6997212 Choke valve with temperature transmitter |
| 02/09/2006 | WO2006015277A1 Downhole inflow control device with shut-off feature |
| 02/09/2006 | US20060027372 Device for improving oil and gas recovery in wells |
| 02/09/2006 | US20060027370 Expandable injector pipe |
| 02/08/2006 | CN2756821Y Multifunction rod control type oil draining device |
| 02/07/2006 | US6995352 Fiber optic based method and system for determining and controlling position of a sliding sleeve valve |
| 02/07/2006 | US6994170 Expandable sand control screen assembly having fluid flow control capabilities and method for use of same |
| 02/07/2006 | CA2450419C Downhole flow control devices |
| 02/07/2006 | CA2425783C Zero drill completion and production system |
| 02/07/2006 | CA2424608C Drill string shutoff valve |
| 02/07/2006 | CA2205334C Vent valve |
| 02/02/2006 | US20060021757 Cross Flow Prevention System and Valve |
| 02/02/2006 | US20060021750 Method and system for injecting a treatment fluid into a well |
| 02/01/2006 | EP1620314A2 Protected integral cylinder valve, gas pressure regulator and flow meter, and method for refilling a gas cylinder so equipped |
| 02/01/2006 | EP0906490B1 Downhole apparatus |
| 02/01/2006 | CN2755276Y Well repairing water tap |
| 02/01/2006 | CN2755275Y Safety tool of Christmas tree in oil well |
| 02/01/2006 | CN1729343A Template and system of templates for drilling and completing offset well bores |
| 01/31/2006 | US6991040 Method and apparatus for locking out a subsurface safety valve |
| 01/31/2006 | US6991039 Well operations system |
| 01/31/2006 | CA2425724C Tubing fill and testing valve |
| 01/31/2006 | CA2295592C Bypass valve closing means |
| 01/31/2006 | CA2234556C Hydraulic setting tool |
| 01/31/2006 | CA2120484C Gravel packing system |
| 01/26/2006 | WO2006009719A1 System and method for fracturing and gravel packing a borehole |
| 01/25/2006 | CN2753869Y Snubbing replaceable high-pressure natural gas recovery wellhead sluice valve device |
| 01/24/2006 | US6989764 Apparatus and method for downhole well equipment and process management, identification, and actuation |
| 01/24/2006 | US6988556 Deep set safety valve |
| 01/24/2006 | US6988554 Subsea choke control system |
| 01/24/2006 | US6988547 Method and system of fluid analysis and control in hydrocarbon well |
| 01/21/2006 | CA2671526A1 Controlling transient pressure conditions in a wellbore |
| 01/21/2006 | CA2671521A1 Controlling transient pressure conditions in a wellbore |
| 01/19/2006 | US20060011876 Throttle device |
| 01/19/2006 | US20060011389 Downhole tool |
| 01/19/2006 | US20060011354 Surge reduction bypass valve |
| 01/18/2006 | EP0948700B1 Whipstock |
| 01/11/2006 | EP1350008B8 A sleeve valve for controlling fluid flow between a hydrocarbon reservoir and tubing in a well and method for the assembly of a sleeve valve |
| 01/11/2006 | EP1350007B8 Device for an opening in an outer sleeve of a sleeve valve and a method for the assembly of a sleeve valve |
| 01/11/2006 | CN2751136Y 井口压力控制器 Wellhead pressure controller |
| 01/10/2006 | US6983803 Equalizer valve and associated method for sealing a fluid flow |
| 01/10/2006 | US6983795 Downhole zone isolation system |
| 01/10/2006 | CA2278933C Tool and method for drilling a lateral well |
| 01/05/2006 | WO2006001974A2 Pressure monitoring of control lines for tool position feedback |
| 01/05/2006 | WO2006000799A2 Valve |
| 01/05/2006 | WO2005108741B1 Tool trap assembly and method |
| 01/05/2006 | CA2613628A1 Valve |
| 01/04/2006 | EP1181434B1 Valve with secondary load bearing surface |
| 01/04/2006 | CN2750038Y Theft-proof collar clamp |
| 01/03/2006 | US6981553 Controlled downhole chemical injection |
| 12/29/2005 | US20050286990 Tightening system for secure connection of at least two elements with one another |
| 12/29/2005 | US20050284642 Valve apparatus with seal assembly |
| 12/29/2005 | US20050284639 Pressure-compensated flow shut-off sleeve for wellhead and subsea well assembly including same |
| 12/28/2005 | EP1610007A1 Tightening system for secure connection of at least two element with one another |
| 12/28/2005 | EP1325211B1 Expandable lockout for a subsurface safety valve |
| 12/28/2005 | EP1290311B1 Sequential hydraulic control system for use in subterranean well |
| 12/28/2005 | EP1175549B1 Rotating blowout preventer |
| 12/28/2005 | CN1712747A Tightening system for secure connection of at least two elements with one another |
| 12/27/2005 | CA2403876C Internal gate valve for flow completion systems |
| 12/27/2005 | CA2403866C Tubing hanger with annulus bore |
| 12/27/2005 | CA2269876C Underbalanced drill string deployment valve method and apparatus |
| 12/22/2005 | WO2005121502A1 Erosion resistent aperture for a downhole valve or ported flow control tool |
| 12/22/2005 | WO2005100740A3 Flapper opening mechanism |
| 12/22/2005 | US20050279506 Flow-biased sequencing valve |
| 12/22/2005 | US20050279503 Slickline power control interface |
| 12/22/2005 | US20050279501 System and method for fracturing and gravel packing a borehole |
| 12/22/2005 | US20050279496 Apparatus and Method to Detect Actuation of a Flow Control Device |
| 12/21/2005 | EP1606526A2 Method for preventing critical annular pressure buildup |
| 12/21/2005 | CN2747354Y Self-sealing type single flow water distributor for water well |
| 12/20/2005 | US6976542 Mud flow back valve |
| 12/20/2005 | US6976541 Liner hanger with sliding sleeve valve |