| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 06/19/2013 | CN203008846U Self-expanding type oil and gas well wall plugging and strengthening pipe nipple and sending and releasing device thereof |
| 06/19/2013 | CN203008845U Staged fracturing packer of oil-gas horizontal well |
| 06/19/2013 | CN203008844U Down-hole operation blowout preventer for oil gas field development |
| 06/19/2013 | CN203008843U Blowout-preventing operation device for stripping sucker rod in oil field with pressure |
| 06/19/2013 | CN203008842U Multifunctional cable blowout preventer |
| 06/19/2013 | CN203008841U Fast-rise type bidirectional seal packing box for rod-pumped well |
| 06/19/2013 | CN203008840U Multi-purpose well shutting device |
| 06/19/2013 | CN203008839U Wellhead self-seal body |
| 06/19/2013 | CN203008838U Dual-tubing and dual-suspension wellhead |
| 06/19/2013 | CN203008837U Metal sealing structure |
| 06/19/2013 | CN203008836U Well washing anti-spraying device in hollow rod |
| 06/19/2013 | CN203008808U Casing centralizer with variable diameter and rotational flow function |
| 06/19/2013 | CN203006489U Offshore platform ash can |
| 06/19/2013 | CN103161443A Detection and sealing integrated method and device for gas extraction drill hole |
| 06/19/2013 | CN103161422A Visual ram position indicator apparatuses and methods |
| 06/19/2013 | CN103161421A Oil pumping polished rod lubrication sealing device |
| 06/19/2013 | CN103160266A Viscosity-reduction, profile-control and oil-displacement oil well additive, oil well combination treating agent and application thereof |
| 06/19/2013 | CN103160264A Oil well combined treating agent for viscosity reduction, profile control and oil displacement and application thereof |
| 06/19/2013 | CN103160262A Oil well reservoir fracture plugging agent, and preparation method and application thereof |
| 06/19/2013 | CN103160261A Preparation and use method of downhole intelligent plug |
| 06/19/2013 | CN103160259A 255 DEG C superhigh temperature resistant water-based drilling fluid and construction process thereof |
| 06/19/2013 | CN102268974B Special tail pipe hanging packing assembly for shallow horizontal well |
| 06/19/2013 | CN102226377B Drill string equipped with downhole blowout preventer and working method thereof |
| 06/19/2013 | CN102200024B Gas extraction center divided-flow type grouting and hole sealing device and hole sealing method |
| 06/19/2013 | CN102061902B Special tool for installing rubber stopper on well cementing cement head of oil field |
| 06/19/2013 | CN101979826B Method for repairing coal bed gas multi-branch horizontal accident well |
| 06/19/2013 | CN101929320B Power swivel |
| 06/19/2013 | CN101725330B Drilling-and-plugging-free well fixing method and tool |
| 06/19/2013 | CN101688438B Running tool for expandable liner hanger and associated methods |
| 06/19/2013 | CN101328787B Seal device of oil pumping machine well elastic dynamic seal well head |
| 06/18/2013 | US8464800 Expandable member for downhole tool |
| 06/18/2013 | US8464797 Subsea control module with removable section and method |
| 06/18/2013 | US8464785 Pipe guide arms for blind shear rams |
| 06/18/2013 | CA2797150C Packoff nipple |
| 06/18/2013 | CA2731161C Selective fracturing tool |
| 06/18/2013 | CA2693433C A method and apparatus for subterranean fracturing |
| 06/18/2013 | CA2638234C A retrievable downhole packer assembly |
| 06/13/2013 | WO2013085667A1 Continuous backup assembly for high pressure seals |
| 06/13/2013 | WO2013085665A1 Ball seat milling and re-fracturing method |
| 06/13/2013 | WO2013085662A1 Treatment plug and method of anchoring a treatment plug and then removing a portion thereof |
| 06/13/2013 | WO2013085648A1 Self-inhibited swell packer compound |
| 06/13/2013 | WO2013085621A1 Method for setting a balanced cement plug in a wellbore |
| 06/13/2013 | WO2013085412A1 Well treatment with high solids content fluids |
| 06/13/2013 | WO2012171042A3 Expandable seal with conforming ribs |
| 06/13/2013 | US20130147121 Backup System for Packer Sealing Element |
| 06/13/2013 | US20130147120 Continuous Backup Assembly for High Pressure Seals |
| 06/13/2013 | US20130146793 Visual Ram Position Indicator Apparatuses and Methods |
| 06/13/2013 | US20130146311 Selective Set Module for Multi String Packers |
| 06/13/2013 | US20130146310 Method and apparatus for dropping a pump down plug or ball |
| 06/13/2013 | US20130146307 Treatment plug and method of anchoring a treatment plug and then removing a portion thereof |
| 06/13/2013 | US20130146306 Casing hanger lockdown with conical lockdown ring |
| 06/13/2013 | US20130146299 Combined Barrier and Lubrication Fluids Pressure Regulation System and Unit for a Subsea Motor and Pump Module |
| 06/13/2013 | US20130146297 Preloading device |
| 06/13/2013 | US20130146296 Ratchet and latch mechanisms |
| 06/13/2013 | US20130146286 Self-Repairing Cements |
| 06/13/2013 | US20130146277 Multi-component Anti-extrusion Barrier for a Compression Set Subterranean Barrier |
| 06/13/2013 | US20130146276 Flow Control Hanger and Polished Bore Receptacle |
| 06/13/2013 | CA2858027A1 Well treatment with high solids content fluids |
| 06/13/2013 | CA2857358A1 Self-inhibited swell packer compound |
| 06/13/2013 | CA2857125A1 Ball seat milling and re-fracturing method |
| 06/13/2013 | CA2854860A1 Wireline pressure control apparatus |
| 06/12/2013 | EP2602424A2 Selective Set Module for Multi String Packers |
| 06/12/2013 | CN202991681U Drilling IBOP (internal blowout preventer) protection system |
| 06/12/2013 | CN202990960U Drillable bridge plug |
| 06/12/2013 | CN202990959U Slurry solid control device capable of moving fast |
| 06/12/2013 | CN202990958U Outer packer for casing pipe |
| 06/12/2013 | CN202990957U Plug-in type step-by-step releasable packer |
| 06/12/2013 | CN202990956U Reverse well washing and grading deblocking water injection packer with minor diameter |
| 06/12/2013 | CN202990955U High-temperature underwater over-pump plugging tool |
| 06/12/2013 | CN202990954U Low damping reversing packer |
| 06/12/2013 | CN202990953U Blowout preventing mechanical anchor of screw pump |
| 06/12/2013 | CN202990952U Packer for combined operation of perforation and water injection |
| 06/12/2013 | CN202990951U Through-ball grading setting fracturing packer |
| 06/12/2013 | CN202990950U Large-extension-capacity jaw-type oil pipe inner plugging device |
| 06/12/2013 | CN202990949U Pumping well wellhead blowout preventer |
| 06/12/2013 | CN202990948U Anti-spray orifice apparatus for gas control |
| 06/12/2013 | CN202990947U Basement type underwater dry wellhead structure |
| 06/12/2013 | CN202990946U Anti-deflection packing box device |
| 06/12/2013 | CN202990945U Centering and deviation adjusting device of polished rod of mouth of pumping well |
| 06/12/2013 | CN202990944U Double-layer simple self-sealing tool |
| 06/12/2013 | CN202990943U Controller for well overflow during rod lifting |
| 06/12/2013 | CN202990942U Double-seal Christmas tree for conveniently mounting coiled tubing |
| 06/12/2013 | CN202990941U Combined sealing, double-barrelled gas injection and remote control well head equipment |
| 06/12/2013 | CN202990940U Wellhead seal non-return well cementing device |
| 06/12/2013 | CN202990939U Automatic-compression pumping unit well polished rod packing device |
| 06/12/2013 | CN202990938U Adjustable horn-shape spill-proof opening |
| 06/12/2013 | CN202990937U Multi-stage oil well blowout preventer |
| 06/12/2013 | CN202990936U Double-gyration annulus testing device |
| 06/12/2013 | CN202990935U Pilot-operated two stage well testing blowout control box |
| 06/12/2013 | CN202990934U Well mouth telescopic compensator for oil well |
| 06/12/2013 | CN202990933U Multifunctional polish rod sealer |
| 06/12/2013 | CN202990932U Static sealing element |
| 06/12/2013 | CN202985776U Automatic ash mixing device of oil, gas and well |
| 06/12/2013 | CN103154425A An annular barrier |
| 06/12/2013 | CN103154424A Marine subsea free-standing riser systems and methods |
| 06/12/2013 | CN103147788A Positive pressure and negative pressure combined gas drainage process by pressurizing coal body of thick coal seam |
| 06/12/2013 | CN103147716A Partial cementing method for coal bed gas ground well in mining area |
| 06/12/2013 | CN103147715A Shear pin type automatic grouting valve |
| 06/12/2013 | CN103147714A Annulus safety device applied to electric submersible pump producing well |
| 06/12/2013 | CN103147713A Seal with bellows style nose ring and radially drivable lock rings |