Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685)
03/2011
03/24/2011CA2774276A1 Downhole measurement apparatus
03/23/2011EP2299052A2 Well assembly with removable fluid restricting member
03/23/2011EP2297427A1 Cementing sub for annulus cementing
03/23/2011EP2297426A2 Choke trim assembly
03/23/2011CN201771470U Automatic control apparatus for high-pressure plug valve
03/22/2011US7909102 Frac gate and well completion methods
03/22/2011US7909095 Valve device and associated methods of selectively communicating between an interior and an exterior of a tubular string
03/22/2011CA2715327A1 A valve assembly
03/22/2011CA2597887C System and method for well intervention
03/17/2011WO2011031638A2 System and method for controlling actuation of downhole tools
03/17/2011WO2011031632A2 Tubular seat and tubular actuating system
03/17/2011WO2011031541A2 Method and apparatus for dropping a pump down plug or ball
03/17/2011US20110061875 Casing valves system for selective well stimulation and control
03/17/2011US20110061872 Systems and methods for circulating out a well bore influx in a dual gradient environment
03/17/2011US20110061854 Subsea assembly
03/17/2011CA2808780A1 Method and apparatus for dropping a pump down plug or ball
03/17/2011CA2773540A1 Seat having profiled portion to resist plug extrusion
03/16/2011EP2295715A2 Bottom hole assembly with ported completion and methods of fracturing therewith
03/16/2011EP2294279A1 Downhole sub with hydraulically actuable sleeve valve
03/16/2011CN201763297U DST test-well automatic switcher
03/16/2011CN201763296U Sleeve gas constant pressure throttling discharge device
03/16/2011CN201763295U Oil theft prevention pressure gauge stop valve assembly
03/16/2011CN201763286U Device for changing valve under pressure with no releasing sub
03/16/2011CN101178003B Flechette-type decompression clack-valve for drilling tool
03/15/2011US7906003 Subsea production system
03/15/2011US7905292 Pressure equalization device for downhole tools
03/15/2011CA2595492C Flow valve and method
03/15/2011CA2364701C Debris free valve apparatus
03/10/2011WO2011028563A2 Multi-acting circulation valve
03/10/2011WO2011028562A2 Isolation valve for subterranean use
03/10/2011WO2011028560A2 Fracturing and gravel packing tool with multi-position lockable sliding sleeve
03/10/2011WO2011028559A2 Fracturing and gravel packing tool with upper annulus isolation in a reverse position without closing a wash pipe valve
03/10/2011WO2011028558A2 Fracturing and gravel packing tool with anti-swabbing feature
03/10/2011WO2010123588A3 New and improved fracture valve and related methods
03/10/2011US20110056696 Subsea drilling
03/10/2011US20110056695 Valves, bottom hole assemblies, and method of selectively actuating a motor
03/10/2011US20110056692 System for completing multiple well intervals
03/10/2011US20110056686 Flow Rate Dependent Flow Control Device
03/10/2011US20110056681 Method and apparatus for performing wireline logging operations in an under-balanced well
03/10/2011US20110056679 System and method for controlling actuation of downhole tools
03/09/2011CN201756947U Twin-plug hoop
03/09/2011CN101984215A Tubing drain
03/09/2011CN101373024B Manual super control device for sluice valve assembly
03/08/2011US7900707 Apparatus and method for selectively controlling fluid downhole in conjunction with a progressive cavity pump (PCP)
03/08/2011US7900705 Flow control assembly having a fixed flow control device and an adjustable flow control device
03/03/2011WO2010141795A3 Subsea control module with interchangeable segments
03/03/2011WO2010141722A3 Coated spring and method of making the same
03/03/2011WO2010138413A3 Wellbore shut off valve with hydraulic actuator system
03/03/2011WO2009112530A3 A tool for shutting off openings or leaks in a well bore
03/03/2011US20110048742 Downhole Safety Valve Having Flapper and Protected Opening Procedure
03/03/2011US20110048732 System and method for controlling the flow of fluid in branched wells
03/03/2011US20110048725 Isolation Valve for Subterranean Use
03/03/2011US20110048724 System for pulse-injecting fluid into a borehole
03/03/2011US20110048723 Multi-acting Circulation Valve
03/03/2011US20110048722 Method for extracting biogas and corresponding device
03/02/2011EP2290192A1 Apparatus and method for autofill equipment activation
03/02/2011CN201753595U 泄油器 Bleeder
03/02/2011CN201753594U Horizontal well one-way valve
03/02/2011CN101982642A Remote control type drilling bypass circulation valve
03/01/2011US7896091 Convertible seal
03/01/2011US7896082 Methods and apparatus for negating mineral scale buildup in flapper valves
03/01/2011CA2529915C Remotely actuating a valve
03/01/2011CA2433703C Curved flapper valve
02/2011
02/26/2011CA2713790A1 Fluid injection device
02/24/2011WO2011022323A2 Self aligning mud saver valve seat
02/24/2011WO2011022284A2 Sliding sleeve locking mechanisms
02/24/2011WO2011020978A1 Apparatus for downhole power generation
02/24/2011US20110042107 Sliding Sleeve Locking Mechanisms
02/24/2011US20110042100 Wellbore circulation assembly
02/24/2011US20110042099 Remote Actuated Downhole Pressure Barrier and Method for Use of Same
02/24/2011US20110042092 Alternating flow resistance increases and decreases for propagating pressure pulses in a subterranean well
02/24/2011US20110042091 Flow path control based on fluid characteristics to thereby variably resist flow in a subterranean well
02/24/2011US20110042089 Openhole perforating
02/24/2011US20110042083 Method of improving waterflood performance using barrier fractures and inflow control devices
02/24/2011US20110042071 Clean fluid sample for downhole measurements
02/24/2011CA2771350A1 Self aligning mud saver valve seat
02/23/2011EP2287438A1 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well
02/23/2011CN101981270A System and method for recompletion of old wells
02/22/2011US7891432 Apparatus and methods for setting one or more packers in a well bore
02/22/2011US7891430 Water control device using electromagnetics
02/22/2011US7891428 Safety valve
02/22/2011CA2611316C Wellhead bypass method and apparatus
02/18/2011CA2711083A1 Wellbore circulation assembly
02/17/2011WO2011020006A2 Repeatable, compression set downhole bypass valve
02/17/2011WO2011019930A1 Dual barrier plug system for a wellhead
02/17/2011WO2011019645A2 Permanent magnet linear motor actuated safety valve and method
02/17/2011WO2011019643A2 Tubular valving system and method
02/17/2011WO2011019561A2 Tubular actuator, system and method
02/17/2011WO2011019559A2 Tubular actuator, system and method
02/17/2011WO2011018659A1 Actuator and method
02/17/2011US20110036632 Control systems and methods for directional drilling utilizing the same
02/17/2011US20110036592 Tubular valving system and method
02/17/2011US20110036591 Flow stop valve
02/17/2011US20110036590 System and method for servicing a wellbore
02/17/2011US20110036586 Self Aligning Mud Saver Valve Seat
02/17/2011US20110036585 Actuator device for downhole tools
02/17/2011US20110036578 Apparatus and Method for Passive Fluid Control in a Wellbore
02/17/2011CA2770076A1 Tubular valving system and method
02/17/2011CA2770064A1 Tubular actuator, system and method
02/17/2011CA2770061A1 Tubular actuator, system and method
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