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 33 - Sealing or packing boreholes or wells
Patents for E21B 33 - Sealing or packing boreholes or wells (33,564)
11/2008
11/11/2008US7448449 Cementing a subterranean formation penetrated by an oil or gas well by placing into the subterranean zone of the formation to be cemented a slurry comprising a cementitious material and a bismuth salt or derivative and setting, wherein strength retrogression of the set cement is controlled or prevented
11/11/2008US7448445 Downhole tools having a seal ring with reinforcing element
11/11/2008US7448444 Tubing saver rotator and method for using same
11/11/2008US7448442 Pad type plunger
11/06/2008WO2008134700A2 Single line sliding sleeve downhole tool assembly
11/06/2008WO2008134371A2 Use of curable liquid elastomers to produce gels for treating a wellbore
11/06/2008WO2008134359A1 Use of elastomers to produce gels for treating a wellbore
11/06/2008WO2008134266A1 Subsea well control system and method
11/06/2008WO2008134191A1 Lightweight device for remote subsea wireline intervention
11/06/2008WO2008133527A2 Barrier for instrumentation piping
11/06/2008WO2008133523A1 Seal for a drill string
11/06/2008WO2008132496A2 Blowout preventer
11/06/2008WO2007124374A3 Well tools with actuators utilizing swellable materials
11/06/2008US20080271898 Pressure Isolation Plug for Horizontal Wellbore and Associated Methods
11/06/2008US20080271884 Dropping sub method and apparatus
11/06/2008US20080271883 Oil well completion tool having severable tubing string barrier disc
11/06/2008CA2685021A1 Seal for a drill string
11/05/2008EP1988253A2 Anti-rotation spray for cementing plugs
11/05/2008EP1987225A2 Wellbore method and apparatus for completion, production and injection
11/05/2008EP1456501B1 Method and apparatus for replacing bop with gate valve
11/05/2008CN201145094Y Self-locking type movable elbow fixing device
11/05/2008CN201144674Y Novel downhole choke having sealing structure
11/05/2008CN201144665Y High-pressure pipe joint union backing pin type cement head
11/05/2008CN201144664Y Self-lubricating anti-offset polished rod sealer
11/05/2008CN201144663Y Special electrical heating plug for winter test of separate injection well
11/05/2008CN201144662Y Energy-saving offset-adjusting polished rod sealer
11/05/2008CN201144661Y Key-lock type packing kit press cap
11/05/2008CN201144660Y Pumping blowout-preventing box
11/05/2008CN201144659Y Polished rod sealing device for rod oil pumping
11/05/2008CN101300433A Modular backup fluid supply system
11/04/2008US7445046 Nested velocity string tubing hanger
11/04/2008CA2266367C Granular particle gripping surface
10/2008
10/30/2008WO2008130876A1 Running tool for expandable liner hanger and associated methods
10/30/2008WO2008130852A2 Christmas tree with internally positioned flowmeter
10/30/2008WO2008067152B1 Lubricator valve with rotational flip-flap arm
10/30/2008US20080265517 System, method, and apparatus for energizable metal seals in well heads
10/30/2008US20080265188 Ram locking blowout preventer
10/30/2008US20080264647 Shape memory materials for downhole tool applications
10/30/2008US20080264646 Modular Actuator for Subsea Valves and Equipment, and Methods of Using Same
10/30/2008US20080264636 Method and apparatus for hydraulic treatment of a wellbore
10/30/2008US20080264627 Permanent anchoring device
10/30/2008CA2684547A1 Running tool for expandable liner hanger and associated methods
10/29/2008EP1985795A2 Blow out preventer
10/29/2008EP1984665A1 A disengageable spindle drive
10/29/2008EP1984598A2 Friction spring release mechanism
10/29/2008EP1588014B1 Mounts for blowout preventer bonnets
10/29/2008CN201141294Y Movable plug
10/29/2008CN201141293Y Simple exploitation and injection dual-purpose shaft mouth
10/29/2008CN201141292Y Oil-production and vapor-injection dual-purpose well mouth device
10/29/2008CN201141288Y Replaced packing safety fastener
10/29/2008CN101294482A Shape memory materials for downhole tool applications
10/28/2008US7441607 Circulation tool
10/28/2008US7441606 Expandable fluted liner hanger and packer system
10/28/2008US7441605 Optical sensor use in alternate path gravel packing with integral zonal isolation
10/28/2008US7441600 using foamed cement compositions of carbon fibers, a hydraulic cement material, sufficient water to form a slurry, an expanding additive; tensile strength and elasticity for example
10/28/2008US7441599 Controlling the pressure within an annular volume of a wellbore
10/28/2008US7441598 Methods of stabilizing unconsolidated subterranean formations
10/28/2008US7441596 Swelling element packer and installation method
10/28/2008US7441594 Full bore wellhead load shoulder and support ring
10/28/2008CA2366874C Wellbore isolation technique
10/23/2008WO2008128066A2 Cement plug launch system
10/23/2008WO2008127837A1 Liner top packer seal assembly and method
10/23/2008WO2008127836A1 Tieback seal system and method
10/23/2008WO2008127371A2 Subsea rov retrievable tree cap
10/23/2008WO2008125629A2 Method of cementing an off bottom liner
10/23/2008WO2008125137A1 Power supply system
10/23/2008WO2008125135A1 Power supply device
10/23/2008WO2008109693A3 Contacting surfaces using swellable elements
10/23/2008WO2008060893B1 Large bore packer and methods of setting same
10/23/2008WO2006103630A8 Improved inflatable packers
10/23/2008US20080257605 Method of forming a bore
10/23/2008US20080257557 Wellbore Control Device
10/23/2008US20080257540 Multipart frac head with replaceable components
10/23/2008CA2684473A1 Device of a test plug
10/23/2008CA2681422A1 Safety cement plug launch system
10/22/2008EP1982045A1 Remote plugging device for wells
10/22/2008EP1982042A1 Bore selector
10/22/2008EP1718840B1 Stripper rubber adapter
10/22/2008CN201137489Y Wellhead pressure test
10/22/2008CN201137479Y Cementing cement car
10/22/2008CN201137478Y Multipurpose hydraulic blow-out preventer for preventing pipe column falling
10/22/2008CN201137477Y Combined polish rod sealer
10/22/2008CN201137464Y Prearranged process pipe column for gas well maintenance without killing
10/22/2008CN101289931A Oil well production increasing environment-friendly device
10/22/2008CN101289928A Wellhead deflection-regulating sealing blowout-preventing device for oil pumping machine well
10/21/2008US7438135 Method of suspending, completing and working over a well
10/21/2008US7438132 Concentric pipes expanded at the pipe ends and method of forming
10/21/2008US7438126 Apparatus for controlling a tool having a mandrel that must be stroked into or out of a well
10/21/2008US7438125 Variable orifice bypass plunger
10/21/2008CA2553561C Retrievable plug system oriented using tubing seam
10/16/2008WO2008122577A2 Intervention system dynamic seal and compliant guide
10/16/2008WO2008122372A1 Method and composition for zonal isolation of a well
10/16/2008WO2008056301B1 Method of plugging fractured formation
10/16/2008WO2008034024A3 Capillary injector
10/16/2008WO2007124412A3 Time sequenced heating of multiple layers in a hydrocarbon containing formation
10/16/2008US20080251261 Liner top packer seal assembly and method
10/16/2008US20080251256 Tieback seal system and method
10/16/2008US20080251253 Method of cementing an off bottom liner
10/16/2008US20080251250 Annular Isolators for Expandable Tubulars in Wellbores
10/16/2008US20080251249 Safety cement plug launch system
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