Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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01/24/2002 | US20020007946 Hydraulic well control system |
01/24/2002 | US20020007856 Combination poppet and gate valve |
01/23/2002 | CN2473330Y Anti-theft device for gas well wellhead |
01/17/2002 | US20020005299 Electrical surface activated downhole circulating sub |
01/16/2002 | EP1171684A1 Downhole device for controlling fluid flow in a well |
01/16/2002 | EP0923690A4 Integrated power and control system |
01/16/2002 | CN2471927Y Oil production device for sand washover and without killing well |
01/16/2002 | CN2471926Y Oil well control pipeline |
01/16/2002 | CN2471925Y Quick acting blowout control device for oil well |
01/16/2002 | CN2471924Y Sampling valve on hole top |
01/15/2002 | US6338466 Water well recharge throttle valve |
01/15/2002 | US6338385 Retrievable downhole adjustable choke |
01/15/2002 | CA2244593C Dual stage rotary screw pump tool and method of pump flushing |
01/15/2002 | CA2190929C Linear indexing apparatus and methods of using same |
01/10/2002 | WO2002002907A1 Method and system for stepwise varying fluid flow in a well |
01/10/2002 | US20020003038 Downhole well-control valve reservoir monitoring and drawdown optimization system |
01/10/2002 | CA2414730A1 Method and system for stepwise varying fluid flow in a well |
01/03/2002 | WO2001065062A3 Use of downhole high pressure gas in a gas-lift well |
01/03/2002 | US20020000322 Flow completion system |
01/03/2002 | US20020000320 Disconnect tool |
01/03/2002 | US20020000316 Method and apparatus for the optimal predistortion of an electromagnetic signal in a downhole communication system |
01/03/2002 | US20020000315 Flow completion apparatus |
01/02/2002 | CN2469175Y Umbrella claw sleeve type oil pipe oil drainage apparatus |
01/01/2002 | US6334488 Tubing plug |
01/01/2002 | US6334487 Valve assembly |
01/01/2002 | US6334486 Downhole flow control devices |
01/01/2002 | US6334485 Deviated borehole drilling assembly |
12/27/2001 | US20010054969 Apparatus and method for downhole well equipment and process management, identification, and actuation |
12/27/2001 | US20010054507 Tubing hanger system |
12/27/2001 | US20010054505 Downhole flow control devices |
12/27/2001 | US20010054504 Downhole flow control devices |
12/26/2001 | CN2467789Y Safety disengaged oil extractor |
12/25/2001 | US6333700 Apparatus and method for downhole well equipment and process management, identification, and actuation |
12/25/2001 | US6332498 Deviated borehole drilling assembly |
12/25/2001 | CA2067071C Casing shut-in valve system |
12/19/2001 | EP0851967B1 Single bore riser system |
12/19/2001 | CN2466343Y Pumping wellhead assembly |
12/13/2001 | WO2001094743A2 Port collar assembly for use in a wellbore |
12/13/2001 | WO2001094739A1 Method for drilling and casing a wellbore with a pump down cement float |
12/13/2001 | WO2001040624A3 Production valve |
12/11/2001 | US6328112 Valves for use in wells |
12/11/2001 | US6328109 Downhole valve |
12/11/2001 | US6328070 Valve arrangement for controlling hydraulic fluid flow to a subsea system |
12/11/2001 | US6328062 Torsion spring connections for downhole flapper |
12/11/2001 | US6328055 Annulus pressure referenced circulating valve |
12/06/2001 | US20010047867 Circulation tool for use in gravel packing of wellbores |
12/05/2001 | EP1159510A2 Wellbore primary barrier and related systems |
12/05/2001 | CN2463536Y Hydraulic layer-changing device |
12/04/2001 | US6325153 Multi-valve fluid flow control system and method |
12/04/2001 | US6325152 Method and apparatus for increasing fluid recovery from a subterranean formation |
12/04/2001 | US6325151 Packer annulus differential pressure valve |
12/04/2001 | US6325150 Sliding sleeve with sleeve protection |
11/29/2001 | WO2001090532A1 Hydraulically operated fluid metering apparatus for use in a subterranean well |
11/29/2001 | WO2001090529A1 By-pass tool for use in a drill string |
11/29/2001 | WO2001073423A8 Apparatus and method for downhole well equipment and process management, identification, and actuation |
11/29/2001 | US20010045538 Gate valve with flow-through gate |
11/29/2001 | US20010045290 Method and apparatus for selective injection or flow control with through-tubing operation capacity |
11/29/2001 | US20010045288 Drop ball sub and system of use |
11/29/2001 | US20010045281 Full bore set down tool assembly for gravel packing a well |
11/28/2001 | CN2462071Y Normally opening pressure testing valve |
11/28/2001 | CN2462070Y Oil discharging flushing valve |
11/27/2001 | US6321847 Downhole pressure activated device and a method |
11/27/2001 | US6321845 Apparatus for device using actuator having expandable contractable element |
11/27/2001 | US6321843 Preloading type connector |
11/27/2001 | US6321842 Flow control in a wellbore |
11/27/2001 | CA2319674C Sand sleeve and method of use of the same |
11/22/2001 | WO2001088328A1 Valve assembly |
11/22/2001 | US20010043146 Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
11/22/2001 | US20010042848 Cartridge gate valve |
11/22/2001 | US20010042626 Valve assembly |
11/22/2001 | US20010042624 Controls bridge for flow completion systems |
11/22/2001 | US20010042619 Tubing hanger saddle valve |
11/22/2001 | US20010042618 Internal gate valve for flow completion systems |
11/22/2001 | US20010042617 Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
11/22/2001 | CA2556676A1 Valve assembly |
11/20/2001 | US6318729 Seal assembly with thermal expansion restricter |
11/20/2001 | US6318482 Blowout preventer |
11/20/2001 | US6318469 Completion equipment having a plurality of fluid paths for use in a well |
11/20/2001 | US6318465 Unconsolidated zonal isolation and control |
11/20/2001 | US6318457 Multilateral well and electrical transmission system |
11/15/2001 | WO2001086183A1 Control cable |
11/15/2001 | WO2001086113A1 Sleeve valve and method for its assembly |
11/15/2001 | WO2001086110A1 Subsea riser disconnect and method |
11/15/2001 | US20010040052 Method and system for return of drilling fluid from a sealed marine riser to a floating drilling rig while drilling |
11/15/2001 | CA2408807A1 Subsea riser disconnect and method |
11/14/2001 | CN2459438Y Shearing type pipe controlled oil releaser |
11/13/2001 | US6315050 Packer |
11/13/2001 | US6315049 Multiple line hydraulic system flush valve and method of use |
11/13/2001 | US6315047 Eccentric subsurface safety valve |
11/08/2001 | WO2001083939A1 Hydraulic control system for downhole tools |
11/08/2001 | US20010037884 Hydraulic control system for downhole tools |
11/07/2001 | EP1151178A1 Subsea completion apparatus |
11/07/2001 | CN2458422Y Anti-theft dog valve |
11/07/2001 | CN2458421Y Dog type anti-theft well head device |
11/06/2001 | US6311777 Well logging tool |
11/01/2001 | WO2001081801A2 Combination poppet and gate valve |
11/01/2001 | WO2001081710A1 Central circulation completion system |
11/01/2001 | US20010036905 Filter cake cleanup and gravel pack methods for oil based or water based drilling fluids |
11/01/2001 | US20010035287 Data line deployment in hydrocarbon wells |
11/01/2001 | US20010035057 Apparatus for passive removal of subsurface contaminants and mass flow measurement |