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