| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 02/20/2008 | CN201024972Y An external sealer for fixing well pipe |
| 02/20/2008 | CN201024971Y A water injection well sealer |
| 02/20/2008 | CN201024970Y Rubber core assembly for rotary ejection preventer |
| 02/20/2008 | CN201024969Y Rotary ejection preventer for under balance drilling well |
| 02/20/2008 | CN201024968Y Automatic valve type ejection preventive box |
| 02/20/2008 | CN201024967Y An ejection preventer for brake plate well mouth |
| 02/20/2008 | CN201024966Y Ground ejection preventer control device |
| 02/20/2008 | CN201024965Y Pumping and drawing cutting ejection preventer |
| 02/20/2008 | CN201024964Y Ejection prevention automatic close device for oil pumping well mouth |
| 02/20/2008 | CN201024963Y Hydraulic spray preventer for cable erection hole three brake plate |
| 02/20/2008 | CN201024962Y Novel base sealing simple bushing header |
| 02/20/2008 | CN201024961Y Whole core axis bushing header |
| 02/20/2008 | CN201024960Y Core axis bushing header with stop bolt |
| 02/20/2008 | CN201024959Y Integrated bushing header |
| 02/20/2008 | CN201024958Y Rotary well mouth |
| 02/20/2008 | CN201024957Y Energy saving oil pumping well mouth sealer |
| 02/20/2008 | CN201024956Y Dual force imposing well mouth controller |
| 02/20/2008 | CN201024955Y Oil collection device for three-preventive combined well mouth |
| 02/20/2008 | CN201024954Y Temperature preservation device for three-direction oil exploration well mouth |
| 02/20/2008 | CN201024953Y Multi-functional automatic deviation adjustment nude pole sealer |
| 02/20/2008 | CN201024952Y Theft prevention well mouth device |
| 02/20/2008 | CN201024951Y Pressing cover for theft preventive nude pole sealer |
| 02/20/2008 | CN201024915Y Jet preventive connecting-tripping device |
| 02/20/2008 | CN101128645A Improvements in or relating to hydraulic rams |
| 02/19/2008 | US7331581 Inflatable packers |
| 02/19/2008 | US7331562 Blowout preventer with breech assembly |
| 02/19/2008 | US7331396 Subsea production systems |
| 02/19/2008 | US7331394 Autonomous well intervention system |
| 02/19/2008 | US7331393 Subsea lubricator device and methods of circulating fluids in a subsea lubricator |
| 02/19/2008 | US7331391 Well treating method to prevent or cure lost-circulation |
| 02/19/2008 | CA2459723C Active controlled bottomhole pressure system and method |
| 02/19/2008 | CA2333516C Arrangement for the removal of cuttings and gas arising from drilling operations |
| 02/19/2008 | CA2327987C Wellhead with improved esp cable pack-off and method |
| 02/19/2008 | CA2322937C Cementing wells with crack and shatter resistant cement |
| 02/14/2008 | US20080035344 Delayed polyacrylamide-co-aluminum hydroxyl chloride gel |
| 02/14/2008 | US20080035343 Tight Formation Water Shut Off Method with Silica Gel |
| 02/14/2008 | US20080035326 System and apparatus for sealing a fracturing head to a wellhead |
| 02/13/2008 | EP1644671B1 A method of constructing a geothermal heat exchanger |
| 02/13/2008 | CN201021613Y A separator for ultra-expansion thermal exploration |
| 02/13/2008 | CN201021612Y Separation device for dense SAGD steam driven gas injection well |
| 02/13/2008 | CN201021611Y Spraying preventive device for tray root box |
| 02/13/2008 | CN201021610Y Spraying preventive multi-function high-pressure tray root box |
| 02/13/2008 | CN201021609Y A sealing device for high-performance pole oil pumping well mouth |
| 02/13/2008 | CN201021608Y Suspender for extensible full-pass diameter end pipe of top pressure clip block |
| 02/13/2008 | CN101122216A Automatically deviation-adjusting anti-corrosion wear resisting well mouth sealing device |
| 02/12/2008 | US7328750 Sealing plug and method for removing same from a well |
| 02/12/2008 | US7328745 Acid ammonium salts of an imide of polymaleic anhydride; hydraulic fracturing fluids used in enhanced oil recovery |
| 02/12/2008 | US7328743 Toe-to-heel waterflooding with progressive blockage of the toe region |
| 02/12/2008 | US7328742 Seal cup for a wellbore tool and method |
| 02/12/2008 | CA2591625C Annular barrier tool |
| 02/12/2008 | CA2392277C Bottom hole assembly |
| 02/12/2008 | CA2363495C A method and apparatus for drilling off a floating structure |
| 02/12/2008 | CA2363132C Internal riser rotating control head |
| 02/07/2008 | WO2008016663A2 Modified christmas tree components and associated methods for using coiled tubing in a well |
| 02/07/2008 | WO2008015387A1 Purge system |
| 02/07/2008 | WO2007134255A3 Stage cementing methods used in casing while drilling |
| 02/07/2008 | WO2007070805A3 Apparatus for gripping a tubular on a drilling rig |
| 02/07/2008 | WO2006127895B1 Expandable bridge plug and setting assembly |
| 02/07/2008 | US20080029966 Seal assembly |
| 02/07/2008 | US20080029271 Modified Christmas Tree Components and Associated Methods For Using Coiled Tubing in a Well |
| 02/07/2008 | US20080029269 Method and system for installing equipment for production and injection operations |
| 02/07/2008 | US20080029264 High Pressure and Temperature Seal for Downhole Use |
| 02/07/2008 | US20080029262 Sphere launcher |
| 02/07/2008 | CA2659383A1 Biocide for well stimulation and treatment fluids |
| 02/06/2008 | EP1884703A2 Sphere launcher |
| 02/06/2008 | EP1883742A1 Sealing device |
| 02/06/2008 | CN201016290Y Hydraulic double-gate flat-type oil-test blow-out preventer |
| 02/06/2008 | CN201016289Y Pumping unit well mouth spraying-proof, drip-preventing and energy-saving device |
| 02/06/2008 | CN201016288Y Well mouth hydraulic self-sealing equipment |
| 02/06/2008 | CN201016287Y Carbonized aramid fiber hybrid filler encapsulation assembly |
| 02/06/2008 | CN201016285Y Compressing-proof electric pump well mouth hanger |
| 02/06/2008 | CN201016278Y Leading-in type geothermal well annular tube separator |
| 02/06/2008 | CN101120153A Method and system for cleaning a well bore |
| 02/06/2008 | CN100366863C Downhole sampling apparatus and method |
| 02/05/2008 | US7326670 Liquid carrier; viscoeleastic anionic surfactant and amphoteric polymer |
| 02/05/2008 | US7325621 Method and apparatus for ECP element inflation utilizing solid laden fluid mixture |
| 02/05/2008 | US7325620 Recoverable, reinforced and vibration-damping plug used for cased wells |
| 02/05/2008 | US7325617 Frac system without intervention |
| 02/05/2008 | US7325612 One-trip cut-to-release apparatus and method |
| 02/05/2008 | US7325611 Cement compositions for reducing gas or water migration and methods of using the same |
| 02/05/2008 | US7325610 Methods and apparatus for handling and drilling with tubulars or casing |
| 02/05/2008 | US7325600 Coil tubing hanger and method of using same |
| 02/05/2008 | US7325598 Vacuum assisted seal engagement for ROV deployed equipment |
| 02/05/2008 | CA2454594C Method and apparatus for surge pressure reduction in a tool with fluid motivator |
| 01/31/2008 | WO2008014517A1 Method of designing blowout preventer seal using finite element analysis |
| 01/31/2008 | WO2008014514A1 Revised cure cycle for annular packing units |
| 01/31/2008 | WO2008014095A1 Swelling packer element with enhanced sealing force |
| 01/31/2008 | WO2007143581A3 Cement blend |
| 01/31/2008 | US20080023917 Seal for blowout preventer with selective debonding |
| 01/31/2008 | US20080023205 System and Method for Maintaining Zonal Isolation in a Wellbore |
| 01/31/2008 | US20080023204 Large bore modular production tree for subsea well |
| 01/31/2008 | US20080023193 Swelling packer element with enhanced sealing force |
| 01/31/2008 | CA2659000A1 Method of designing blowout preventer seal using finite element analysis |
| 01/30/2008 | CN201013321Y Oil gas field multi-well short-distance casecade gas collection device |
| 01/30/2008 | CN201013303Y Weighting drill stem plug-catch spraying-proof device with plug-catch screen pipe |
| 01/30/2008 | CN201013302Y Hydraulic packer setting sealing separating mechanism |
| 01/30/2008 | CN201013301Y Hydraulic packer |
| 01/30/2008 | CN201013300Y Reverse-filling proof water-repellent flow well completion string and device |
| 01/30/2008 | CN201013299Y Boring tool inside blow-out preventer without lateral force |
| 01/30/2008 | CN201013298Y Pump recovery well mis-pressing down-hole pump operation environment protection spraying-proof apparatus |