E21B 34 - Valve arrangements for boreholes or wells

Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685)
11/2009
11/25/2009	CN101589205A Restriction element trap for use with and actuation element of a downhole apparatus and method of use
11/24/2009	US7621337 Casing shoes and methods of reverse-circulation cementing of casing
11/24/2009	US7621336 Casing shoes and methods of reverse-circulation cementing of casing
11/24/2009	CA2474517C Expansion apparatus for use in a wellbore
11/19/2009	WO2009140005A1 Downhole material retention apparatus
11/19/2009	WO2009138849A1 A sub sea hybrid valve actuator system and method
11/19/2009	WO2009073357A4 High differential shifting tool
11/19/2009	US20090283280 Hydraulic open hole packer
11/19/2009	US20090283277 Configurable wellhead system with permanent fracturing spool and method of use
11/19/2009	US20090283276 Overriding a primary control subsystem of a downhole tool
11/19/2009	US20090283272 Pipeless sagd system and method
11/18/2009	EP2118440A1 A downhole valve and method of making
11/18/2009	EP2118439A1 Communication tool for subsurface safety valve
11/18/2009	CN201348078Y Valve plate type oil layer protective valve
11/18/2009	CN201347736Y Casing valve down-well well-killing valve core
11/18/2009	CN201347734Y Abandoned well head cap
11/18/2009	CN101581208A Water injector for automatically balancing downhole flow of oilfield
11/17/2009	US7617876 Formation isolation valve and method of use
11/17/2009	US7617875 Shifting apparatus and method
11/17/2009	US7617874 Flexible matrix composite actuator for use in subsurface wellbores
11/17/2009	CA2576000C Gas lift valve assembly
11/17/2009	CA2436999C 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
11/17/2009	CA2430853C Device for an opening in an outer sleeve of a sleeve valve and a method for the assembly of a sleeve valve
11/12/2009	WO2009137729A2 Choke trim assembly
11/12/2009	WO2009136796A1 Flow controller device
11/12/2009	WO2009120446A3 Borehole plug
11/12/2009	WO2009116869A3 Cleaning tool
11/12/2009	US20090277643 Method and apparatus for continuously injecting fluid in a wellbore while maintaining safety valve operation
11/12/2009	US20090277642 Metal to metal seal for downhole tools
11/12/2009	US20090277639 Fluid Operated Well Tool
11/12/2009	CA2723422A1 Choke trim assembly
11/11/2009	EP2115269A2 Improved system and method for stimulating multiple production zones in a wellbore
11/11/2009	EP2115268A2 System and method for facilitating downhole operations
11/11/2009	CN201344031Y Injection well anti-freezing pressure recording device
11/11/2009	CN201344017Y Built-in pipe lofting device
11/11/2009	CN201344016Y Lower sampling valve of reverse-circulation pipe string
11/11/2009	CN201344015Y Lubricator valve and well completion equipment with same
11/11/2009	CN201344010Y Oil wellhead protector
11/11/2009	CN101575958A Electromagnetic pneumatic switch well valve of natural gas well
11/10/2009	US7614454 Downhole actuation method and apparatus for operating remote well control device
11/10/2009	US7614452 Flow reversing apparatus and methods of use
11/10/2009	CA2563076C Flapper opening mechanism
11/10/2009	CA2512480C Controlling transient pressure conditions in a wellbore
11/05/2009	WO2009134578A2 Drilling system with drill string valves
11/05/2009	WO2009134544A2 Downhole barrier valve
11/05/2009	WO2009134141A1 Internal tree cap and itc running tool
11/05/2009	WO2009133108A1 Mechanical bi-directional isolation valve
11/05/2009	WO2009132462A1 Downhole sub with hydraulically actuable sleeve valve
11/05/2009	WO2009132433A1 System for pulse-injecting fluid into a borehole
11/05/2009	WO2009116875A4 Well plug
11/05/2009	US20090272539 Mechanical Bi-Directional Isolation Valve
11/05/2009	US20090272522 Master ball valve with integrated hanger
11/05/2009	CA2841649A1 Fill up and circulation tool and mudsaver valve
11/05/2009	CA2725328A1 System for pulse-injecting fluid into a borehole
11/05/2009	CA2722149A1 Mechanical bi-directional isolation valve
11/05/2009	CA2719561A1 Downhole sub with hydraulically actuable sleeve valve
11/05/2009	CA2665429A1 Master ball valve with integrated hanger
11/03/2009	US7610957 Downhole debris catcher and associated mill
11/03/2009	CA2550453C Apparatus and methods for utilizing a downhole deployment valve
11/03/2009	CA2537333C Expandable tubulars for use in a wellbore
11/03/2009	CA2401707C Electro-hydraulically pressurized downhole valve actuator
10/2009
10/29/2009	WO2009131753A2 System and method for controlling flow in a wellbore
10/29/2009	WO2009131464A2 High pressure sleeve for dual bore hp riser
10/29/2009	WO2009076334A4 Zonal isolation of telescoping perforation appartus with memory based material
10/29/2009	WO2008094965A8 Rupture disc assembly that withstands much higher back pressures than actuation pressure
10/29/2009	US20090266557 Flapper valve retention method and system
10/29/2009	US20090266556 Formation isolation valve
10/29/2009	US20090266555 System and method for controlling flow in a wellbore
10/29/2009	US20090266553 Apparatus and method for preventing the penetration of seawater into a compressor module during lowering to or retrieval from the seabed
10/28/2009	EP2111496A2 Chemical-injection management system
10/27/2009	US7607487 Packers and methods of use
10/23/2009	CA2661941A1 Shock absorber for sliding sleeve in well
10/22/2009	WO2009129307A2 Multi-section tree completion system
10/22/2009	WO2009094309A3 Pressure balanced piston for subsurface safety valves
10/22/2009	US20090260829 Subsea tree safety control system
10/22/2009	US20090260798 Active mud valve system
10/21/2009	CN201330604Y Needle type theft-proof sampling valve for oil well
10/21/2009	CN201330581Y Oil well casing tube constant pressure valve
10/21/2009	CN201330580Y Novel heat preservation type working barrel for gas lift valve
10/21/2009	CN101563522A Step ratchet mechanism
10/20/2009	US7604063 Flow valve and method
10/20/2009	US7604062 Electric pressure actuating tool and method
10/20/2009	US7604056 Downhole valve and method of making
10/20/2009	US7604055 Completion method with telescoping perforation and fracturing tool
10/20/2009	CA2430884C Re-enterable gravel pack system with inflate packer
10/20/2009	CA2402163C Tracer injection in a production well
10/20/2009	CA2401681C Controlled downhole chemical injection
10/15/2009	WO2009126520A2 Multi-cycle isolation valve and mechanical barrier
10/15/2009	WO2009126438A2 A tubing pressure insensitive actuator system and method
10/15/2009	WO2009056832A3 Nested flextensional transducer and cylindrical actuator modules
10/15/2009	US20090255685 Multi-cycle isolation valve and mechanical barrier
10/15/2009	US20090255682 Large Bore Vertical Tree
10/15/2009	US20090255679 Valve, core sampling apparatus and method
10/14/2009	EP1937935B1 Flow reversing apparatus and methods of use
10/14/2009	CN201326405Y Movable switch-type sand-preventing underground throttle
10/14/2009	CN100549360C Adjustable fixed choke valve
10/14/2009	CN100549359C Method and apparatus for replacing BOP with gate valve
10/13/2009	US7600572 Drillable bridge plug
10/13/2009	US7600563 Dual cylinder lift pump system and method
10/13/2009	US7600534 Valve closing device

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