| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 03/04/2009 | CN201202435Y Changeable type three-safety floating hoop and floating shoe check valve |
| 03/04/2009 | CN201202432Y Self-balance compression type water-blocking packer of horizontal well |
| 03/04/2009 | CN201202431Y Integrated static hydraulic water injection packer for large steepness well |
| 03/04/2009 | CN201202430Y Boring tool inner blowout preventer |
| 03/04/2009 | CN201202429Y Expansion tube hanging seal device for open hole section |
| 03/04/2009 | CN201202428Y Well head blowout preventer |
| 03/04/2009 | CN201202427Y Well head blowout preventer |
| 03/04/2009 | CN201202426Y Magnetofluid polish rod sealer for oil field extraction |
| 03/03/2009 | US7497258 Methods of isolating zones in subterranean formations using self-degrading cement compositions |
| 03/03/2009 | CA2565439C A ram actuator for a blowout preventer |
| 03/03/2009 | CA2564567C Loading cementing darts |
| 03/03/2009 | CA2561349C Restriction tolerant packer cup |
| 03/03/2009 | CA2553897C Methods of cementing in subterranean formations using crack resistant cement compositions |
| 03/03/2009 | CA2362041C Method of locating a cementing plug in a subterranean well |
| 03/03/2009 | CA2340534C Field development system and associated methods |
| 02/28/2009 | CA2599402A1 Method of forming a blowout preventer body |
| 02/26/2009 | WO2009024553A1 Method of creating an annular seal around a tubular element |
| 02/26/2009 | WO2009024507A1 Oil field system for through tubing rotary drilling |
| 02/26/2009 | WO2008147707A3 A self energizing seal element |
| 02/26/2009 | US20090050828 Blow out preventers |
| 02/26/2009 | US20090050329 Subsea adapter for connecting a riser to a subsea tree |
| 02/26/2009 | US20090050328 Method and system for installing subsea insulation |
| 02/26/2009 | CA2696034A1 Method of creating an annular seal around a tubular element |
| 02/25/2009 | EP2028340A1 Oil field system for through tubing rotary drilling |
| 02/25/2009 | EP2027360A1 Methods and devices for treating multiple-interval well bores |
| 02/25/2009 | EP1761680B1 Improved well servicing tool storage system for subsea well intervention |
| 02/25/2009 | CN201198748Y Erosion-proof flange seal well head apparatus of high pressure underground gas storing well |
| 02/25/2009 | CN201198747Y Self-sealing well apparatus for repairing well of oil field |
| 02/25/2009 | CN101375015A Wellbore method and apparatus for completion, production and injection |
| 02/25/2009 | CN101374874A Geosynthetic composite for borehole strengthening |
| 02/25/2009 | CN101373024A Valve system and method |
| 02/25/2009 | CN101372887A Conditioning ferrous alloys into cracking susceptible and fragmentable elements for use in a well |
| 02/24/2009 | US7493958 Technique and apparatus for multiple zone perforating |
| 02/24/2009 | US7493957 Methods for controlling water and sand production in subterranean wells |
| 02/24/2009 | US7493956 Subsurface safety valve with closure provided by the flowing medium |
| 02/24/2009 | US7493948 Wellbore consolidating tool for rotary drilling applications |
| 02/24/2009 | US7493945 Expandable packer with mounted exterior slips and seal |
| 02/24/2009 | US7493944 Wellhead isolation tool and method of fracturing a well |
| 02/19/2009 | WO2009023611A2 Multi-position valve for fracturing and sand control and associated completion methods |
| 02/19/2009 | WO2009023472A2 Expandable leak path preventer in fluid activated downhole tools |
| 02/19/2009 | WO2009023195A1 Control module for subsea equipment |
| 02/19/2009 | WO2009022134A1 Seal structure |
| 02/19/2009 | US20090048028 Sealing Element and a Coupling Device Provided with Such a Sealing Element |
| 02/19/2009 | US20090044958 Sealing device |
| 02/19/2009 | US20090044957 Fracturing plug convertible to a bridge plug |
| 02/18/2009 | EP2024602A1 Energized fluid for generating self-cleaning filter cake |
| 02/18/2009 | EP2024601A1 A method and apparatus for patching a well by hydroforming a tubular metal patch, and a patch for this purpose |
| 02/18/2009 | EP2024460A1 Downhole servicing compositions having high thermal conductivities and methods of using the same |
| 02/18/2009 | CN201196827Y PLC warning system for remote console of ground blowout preventer |
| 02/18/2009 | CN201196073Y Annulus logging pulley apparatus |
| 02/18/2009 | CN201196068Y Assembling type reducing nozzle tip |
| 02/18/2009 | CN201196060Y Hydraulic switch sliding bush |
| 02/18/2009 | CN201196059Y Oil well cementing system |
| 02/18/2009 | CN201196058Y Inverted-extrusion tie-back seal plug used for oil well cementing |
| 02/18/2009 | CN201196057Y Centralizing oil layer well-washing protector |
| 02/18/2009 | CN201196056Y Heatproof shaft mouth blowout preventer |
| 02/18/2009 | CN201196055Y Reconstruction sealing device for packing kit of oil pumping well |
| 02/18/2009 | CN201196054Y Self-sealing anti-leakage polish rod packing box |
| 02/18/2009 | CN201196053Y Double-supporting double-regulating automatic control type shaft mouth blowout preventer |
| 02/18/2009 | CN201196052Y Well head device |
| 02/18/2009 | CN201196051Y Sampling anti-theft device for intelligent remote control type shaft mouth |
| 02/18/2009 | CN201196050Y High-pressure two-stage polished rod sealer |
| 02/18/2009 | CN201196021Y Gas-tight oil layer well washing protector |
| 02/17/2009 | US7490680 Process and system for drilling and lining a bore hole |
| 02/17/2009 | US7490676 Method and system for tubing a borehole in single diameter |
| 02/17/2009 | US7490668 Method for designing and constructing a well with enhanced durability |
| 02/17/2009 | US7490666 Fracturing isolation sleeve |
| 02/17/2009 | CA2428096C Polymeric fluid loss additives and method of use thereof |
| 02/13/2009 | CA2598155A1 Method and apparatus for controlling a well |
| 02/12/2009 | WO2009020951A2 Tangentially-loaded high-load retrievable slip system |
| 02/12/2009 | WO2009020883A1 Flow control system having an isolation device for preventing gas interference during downhole liquid removal operations |
| 02/12/2009 | WO2009019515A2 Connector |
| 02/12/2009 | WO2009019483A2 Downhole tool with slip elements having a friction surface |
| 02/12/2009 | WO2009019461A1 Method and apparatus for isolating a jet forming aperture in a well bore servicing tool |
| 02/12/2009 | US20090038807 Lubricator System |
| 02/12/2009 | US20090038804 Subsurface Safety Valve for Electric Subsea Tree |
| 02/12/2009 | US20090038802 Packer |
| 02/12/2009 | US20090038801 Sealant Compositions and Methods of Use |
| 02/12/2009 | US20090038800 Sealant Compositions and Methods of Use |
| 02/12/2009 | US20090038791 Cup tool with three-part packoff for a high pressure mandrel |
| 02/12/2009 | CA2695463A1 Flow control system having an isolation device for preventing gas interference during downhole liquid removal operations |
| 02/11/2009 | EP2021577A2 Configurable wellbore zone isolation system and related methods |
| 02/11/2009 | EP1664479A4 A method of suspending, completing and working over a well |
| 02/11/2009 | CN201193516Y Well head auto drug-adding and pouring device |
| 02/11/2009 | CN201193501Y Blind plate for cementing |
| 02/11/2009 | CN201193500Y Stage cementing apparatus |
| 02/11/2009 | CN201193499Y Large diameter and cleanable hole type packer |
| 02/11/2009 | CN201193498Y Environment-protecting blowout prevention packer |
| 02/11/2009 | CN201193497Y Polish rod sealing device |
| 02/11/2009 | CN201193496Y Spring type packing gland |
| 02/11/2009 | CN201193495Y Metal sealing element for mandrel hanger |
| 02/11/2009 | CN201193494Y Energy-conserving type oil lubrication packing kit |
| 02/11/2009 | CN201193492Y Package break-out machine |
| 02/11/2009 | CN101366157A Electrical power transmission system |
| 02/11/2009 | CN101365863A Pressure containment devices and methods of using same |
| 02/11/2009 | CN101365862A Wellbore method and apparatus for completion, production and injection |
| 02/11/2009 | CN101365860A Apparatus for gripping a tubular on a drilling rig |
| 02/11/2009 | CN101362320A Mounting or dismounting tools for valve plate and valve seat of gate valve |
| 02/10/2009 | US7488705 Oilwell sealant compositions comprising alkali swellable latex |
| 02/10/2009 | US7487848 Multi-seal for top drive shaft |