Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 34 - Valve arrangements for boreholes or wells
Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685)
08/2003
08/27/2003CN2568808Y Ball stirring switch valve
08/27/2003CN2568807Y Multiple switch valve
08/21/2003US20030155156 Two string drilling system using coil tubing
08/21/2003US20030155131 Deep set safety valve
08/21/2003US20030155130 Interchangeable choke assembly
08/21/2003US20030155120 In-well monitoring and flow control system
08/21/2003US20030155115 Ball dropping assembly
08/21/2003US20030155114 Ball dropping assembly
08/20/2003EP1336721A2 Tubing head seal assembly
08/20/2003CN2567338Y Layer switch device
08/20/2003CN1118613C Device and method for inter independently controlling every regulator
08/19/2003US6607037 Sand control seal for subsurface safety valve
08/14/2003WO2003067024A1 Tubing hanger with ball valve in the annulus bore
08/14/2003WO2003067017A2 Plug installation system for deep water subsea wells
08/14/2003US20030150622 Formation isolation valve
08/14/2003US20030150621 Well control
08/14/2003US20030150620 Tubing hanger with ball valve in the annulus bore
08/14/2003US20030150619 Hydraulic control assembly for actuating a hydraulically controllable downhole device and method for use of same
08/13/2003EP1171684B1 Downhole device for controlling fluid flow in a well
08/13/2003CN2565976Y Liquid insulating anti-seize constant pressure stop check valve
08/12/2003US6604578 Tubular filling system
08/07/2003WO2003064814A1 Expansion apparatus for use in a wellbore
08/07/2003WO2003064811A2 Sand control screen assembly and treatment method using the same
08/07/2003US20030146000 Plug installation system for deep water subsea wells
08/07/2003US20030145993 Fluid flow control apparatus
08/06/2003EP1332274A1 Recovery of production fluids from an oil or gas well
08/06/2003CN2564742Y Blow-out and sand prevention downhole valve
08/06/2003CN2564741Y Booster for oil pump
08/06/2003CN2564740Y Freeze-proof sleeve air escape cock
08/06/2003CN2564739Y Back-pressure valve for displacement experiment
08/05/2003US6601650 Method and apparatus for replacing BOP with gate valve
08/05/2003US6601646 Apparatus and method for sequentially packing an interval of a wellbore
08/05/2003CA2087673C Perforating type lockout tool
07/2003
07/31/2003WO2003062595A1 System and method for a failsafe control of a downhole valve in the event of tubing rupture
07/31/2003WO2003062590A1 Two string drilling system using coil tubing
07/31/2003US20030141061 Sand control screen assembly and treatment method using the same
07/31/2003US20030141060 Sand control screen assembly and treatment method using the same
07/31/2003US20030141059 One trip expansion apparatus for use in a wellbore
07/31/2003US20030141055 Drilling formation tester, apparatus and methods of testing and monitoring status of tester
07/30/2003EP1331356A2 Backflow regulator downhole valve
07/30/2003EP0910725B1 Wellbores utilizing fiber optic-based sensors and operating devices
07/30/2003CN2563299Y Underwell casing gas discharge valve
07/29/2003US6598849 Pressure compensation/control for fail-safe gate valve
07/29/2003US6598682 Reservoir communication with a wellbore
07/29/2003US6598675 Downhole well-control valve reservoir monitoring and drawdown optimization system
07/29/2003CA2417553A1 Pdf valve
07/23/2003EP1328704A1 Gas displaced chamber lift system with closed loop/multi-stage vents
07/23/2003CN2561922Y Oil layer protector
07/23/2003CN2561921Y Anti-over flow uniform valves
07/22/2003US6595296 Hydraulic control assembly
07/22/2003US6595279 Data line deployment in hydrocarbon wells
07/22/2003CA2212199C Well stabilization tools and methods
07/17/2003US20030132006 Method and system for controlling a downhole flow control device using derived feedback control
07/17/2003US20030132001 Flow control device
07/16/2003EP1327051A2 Dual valve well control in underbalanced wells
07/16/2003CN2560749Y Multi-way switching device
07/15/2003US6591915 Method for selective draining of liquid from an oil well pipe string
07/15/2003US6591914 Hydraulic control system for downhole tools
07/15/2003US6591869 Multiport gate valve assembly
07/15/2003US6591700 Apparatus for passive removal of subsurface contaminants and mass flow measurement
07/15/2003CA2192158C Completion sub-sea test tree
07/10/2003WO2003056127A1 Pressure compensation/control for fail-safe gate valve
07/10/2003US20030127232 Optical position sensing for well control tools
07/10/2003US20030127227 Method and apparatus for wellbore fluid treatment
07/09/2003EP1325211A1 Expandable lockout for a subsurface safety valve
07/09/2003EP1325210A2 Apparatus and method for controlling a fluid flow in a wellbore
07/09/2003EP1325207A2 Gas operated pump for use in a wellbore
07/09/2003CN2559783Y Viscous oil thermal recovery well head apparatus
07/09/2003CN2559782Y Serial upper valve cover for oil well pump
07/09/2003CN2559780Y Isolation type unpacking valve control packer
07/08/2003US6588505 Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation
07/08/2003US6588266 Monitoring of downhole parameters and tools utilizing fiber optics
07/03/2003WO2003054347A1 Interventionless bi-directional barrier
07/03/2003US20030121665 Closure mechanism with integrated actuator for subsurface valves
07/03/2003US20030121664 Curved flapper with angle variant seat for a subsurface safety valve
07/02/2003EP1322837A2 Improved well testing system
07/01/2003US6585051 Hydraulically operated fluid metering apparatus for use in a subterranean well, and associated methods
07/01/2003US6585048 Wellbore system having non-return valve
06/2003
06/26/2003WO2003052239A1 Hinged rupture disc with circular score line
06/26/2003US20030116733 Pressure compensation/control for fail-safe gate valve
06/26/2003US20030116327 Well operations system
06/26/2003US20030116320 Circulating cementing collar and method
06/25/2003EP1321624A1 Self-filling cementing collar and method
06/25/2003EP0920571B1 Swivel
06/20/2003CA2414649A1 Circulating cementing collar and method
06/19/2003WO2003050384A1 Production christmas tree
06/19/2003US20030111228 Production flow tree cap
06/19/2003US20030111224 Apparatus and method for gravel packing a horizontal open hole production interval
06/18/2003EP1190156B1 Downhole apparatus
06/18/2003CN1425102A Ceramic components for high pressure oil wells
06/12/2003WO2003048517A1 Closure mechanism with integrated actuator for subsurface valves
06/12/2003WO2003048516A1 Pilot valve
06/11/2003EP1062405B1 Extraction of fluids from wells
06/11/2003CN2555391Y Anti-theft oil production well head
06/11/2003CN2555390Y Electronic anti-theft valve
06/10/2003US6575426 Valve system and method
06/10/2003US6575249 Apparatus and method for locking open a flow control device
06/10/2003US6575246 Method and apparatus for gravel packing with a pressure maintenance tool
06/10/2003US6575243 Zonal isolation tool with same trip pressure test
06/10/2003US6575237 Hydraulic well control system
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