| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 05/25/2011 | CN201843576U Pipe string used for cementing through upper part and well completing through screen pipe at lower part and provided with open well packer |
| 05/25/2011 | CN201843575U Small-diameter oil pipe bridge plug |
| 05/25/2011 | CN201843574U Self-locking type well cementing rubber stopper combined device |
| 05/25/2011 | CN201843573U Underground available and drillable ash injection bridge plug |
| 05/25/2011 | CN201843572U Bag type hole-sealing device |
| 05/25/2011 | CN201843571U Oil drainage type packer |
| 05/25/2011 | CN201843570U Bidirectional bearing packer |
| 05/25/2011 | CN201843569U External packer for solidifiable medium filling tube |
| 05/25/2011 | CN201843568U Oil well packer |
| 05/25/2011 | CN201843567U Tubing plug capable of passing small hole |
| 05/25/2011 | CN201843566U Special device for underground controlling blowout |
| 05/25/2011 | CN201843565U Belt pump type multifunctional water plugging tubular column |
| 05/25/2011 | CN201843564U Beating type constant flow stopper |
| 05/25/2011 | CN201843563U Mechanical downhole inner and outer integrated blowout preventer |
| 05/25/2011 | CN201843562U Integral-type casing head with large flow rate |
| 05/25/2011 | CN201843561U Wear resistant packing |
| 05/25/2011 | CN201843560U Cone-shaped spiral rubber packing |
| 05/25/2011 | CN201843559U Wellhead deviation rectifying pup joint |
| 05/25/2011 | CN201843558U Oil pipe hanger on head of sleeve nipple |
| 05/25/2011 | CN201843557U Reducing flange capable of realizing pressure testing |
| 05/25/2011 | CN201843547U Dust removal tool in blowout preventer |
| 05/25/2011 | CN102071962A Method for sealing downward hole |
| 05/25/2011 | CN102071961A Downward gas drainage drill hole and pressure testing drill hole sealing method |
| 05/25/2011 | CN102071916A Oil-water separate mining string of bottom water reservoir and jet pump thereof |
| 05/25/2011 | CN102071908A Anti-blowout control valve |
| 05/25/2011 | CN102071905A Anti-rotation self-locking rubber plug used for well cementation |
| 05/25/2011 | CN102071904A Cement infilling tube device for bridge plug |
| 05/25/2011 | CN102071903A Method for calculating dosage of horizontal well chemical water shutoff agent |
| 05/25/2011 | CN102071902A Drilling-free cement filling device for horizontal well |
| 05/25/2011 | CN102071901A Horizontal well high-pressure resistant packer for reservoir transformation |
| 05/25/2011 | CN102071900A Custom-pressure expandable naked eye packer |
| 05/25/2011 | CN102071899A Gradually unpacked washable well packer |
| 05/25/2011 | CN102071898A Self-formed baffle and reaction type foam hole sealing device thereof |
| 05/25/2011 | CN102071897A Side door blowout preventing box |
| 05/25/2011 | CN102071896A Wellhead sealing and blowout preventing device for oil pumping machine |
| 05/25/2011 | CN102071895A Glue-filling plug type snubbing work plugging method |
| 05/25/2011 | CN101158277B Multifunctional polish rod sealing device |
| 05/24/2011 | US7947630 Compositions comprising at least two different polymeric microparticles and methods for recovering hydrocarbon fluids from a subterranean reservoir |
| 05/24/2011 | US7946351 Method and device for sealing a void incompletely filled with a cast material |
| 05/24/2011 | US7946345 Methods and compositions for carrier fluids comprising water-absorbent fibers |
| 05/24/2011 | US7946343 Versatile additives for well cementing applications |
| 05/24/2011 | CA2697136C Apparatus and method for inserting and retrieving a tool string through well surface equipment |
| 05/24/2011 | CA2646653C Mounts for blowout preventer bonnets |
| 05/24/2011 | CA2562754C Expandable packer |
| 05/24/2011 | CA2539212C Method and apparatus to complete a well having tubing inserted through a valve |
| 05/24/2011 | CA2425725C Inflatable packer and method |
| 05/19/2011 | WO2011058324A1 Use of micro-electro-mechanical systems (mems) in well treatments |
| 05/19/2011 | WO2011057416A1 Stage tool for wellbore cementing |
| 05/19/2011 | WO2011057329A1 A fluid composition for use in inflatable bag plugging of an earth bore hole |
| 05/19/2011 | WO2011028558A3 Fracturing and gravel packing tool with anti-swabbing feature |
| 05/19/2011 | WO2010019378A3 Plug removal and setting system and method for subsea horizontal x-mas tree |
| 05/19/2011 | WO2009139806A3 High circulation rate packer and setting method for same |
| 05/19/2011 | US20110114326 Multi-piece stacked sealing system and method of using same |
| 05/19/2011 | US20110114315 Solids Free Sealing Fluid |
| 05/19/2011 | US20110114314 Water Control Additive Compounds and Methods of Making and Using Same |
| 05/19/2011 | US20110114306 Methods and Devices for Forming a Wellbore with Casing |
| 05/19/2011 | CA2778720A1 Stage tool for wellbore cementing |
| 05/19/2011 | CA2778124A1 Tubular actuator, system and method |
| 05/19/2011 | CA2771836A1 Hydraulic control system monitoring apparatus and method |
| 05/18/2011 | EP2322758A2 Debris barrier for downhole tools |
| 05/18/2011 | EP2322756A2 Apparatus for gripping a tubular on a drilling rig |
| 05/18/2011 | EP2322755A2 Apparatus for gripping a tubular on a drilling rig |
| 05/18/2011 | EP2321491A2 Subsea well intervention systems and methods |
| 05/18/2011 | CN201835790U High temperature resisting, corrosion resisting, anti-blocking and anti-stuck packer |
| 05/18/2011 | CN201835789U Manual and automatic integral inner blowout preventer with top drive |
| 05/18/2011 | CN201835788U Split type large flow rate casing head |
| 05/18/2011 | CN201835787U Millstone type abrasion-resistant seal combining device for polished rod |
| 05/18/2011 | CN201835786U Duplex type packing box |
| 05/18/2011 | CN201835785U Oil-water well device capable of automatically controlling pressure relief and liquid discharge as well as pumping discharged liquid to production pipeline |
| 05/18/2011 | CN201835784U Well head eccentric testing device for direct-drive screw pump wells |
| 05/18/2011 | CN201835783U Three-dimensional deviation adjusting device of polished rod sealer |
| 05/18/2011 | CN201835779U Oil expansion pipe seat sealing system |
| 05/18/2011 | CN201835760U Pipe string for solving clogging of pumping well |
| 05/18/2011 | CN102061931A Mine polyurethane foam manually synthesized on scene |
| 05/18/2011 | CN102061911A Method for measuring wall thickness of downhole casing |
| 05/18/2011 | CN102061903A Ash pouring cylinder with function of pouring at fixed depth |
| 05/18/2011 | CN102061902A Special tool for installing rubber stopper on well cementing cement head of oil field |
| 05/18/2011 | CN102061901A Compensation type multi-purpose annular blowout preventer |
| 05/18/2011 | CN102061900A Rotary self-sealing well sealer |
| 05/18/2011 | CN102061899A Hydraulic pressure balance work over rig |
| 05/18/2011 | CN102061153A Crude oil emulsifying agent for water plugging of oil well and preparation method thereof |
| 05/18/2011 | CN102061152A High-strength controllable gelout chemical temporary plugging liquid rubber stopper |
| 05/18/2011 | CN102061151A Plugging bearing material for petroleum drilling, and preparation method and application thereof |
| 05/17/2011 | CA2658692C Methods of preparing settable fluids comprising particle-size distribution-adjusting agents, and associated methods |
| 05/17/2011 | CA2641233C Methods of cementing in subterranean formations |
| 05/17/2011 | CA2634860C Combined ftc support system |
| 05/17/2011 | CA2492318C Subsea and landing string distributed temperature sensor system |
| 05/12/2011 | WO2011056409A2 Method of controlling water production through treating proppants with rpms |
| 05/12/2011 | WO2011056394A2 Systems and methods for initiating annular obstruction in a subsurface well |
| 05/12/2011 | WO2011056393A2 Systems and methods for initiating annular obstruction in a subsurface well |
| 05/12/2011 | WO2011056308A1 Wellhead tubular connector |
| 05/12/2011 | WO2011054214A1 Throttle manifold for drilling simulator |
| 05/12/2011 | WO2011054213A1 High-pressure manifold for drilling simulator |
| 05/12/2011 | WO2011028404A3 Expandable gage ring |
| 05/12/2011 | WO2010135149A4 Selective plug and method |
| 05/12/2011 | WO2010135148A4 Selective plug and method |
| 05/12/2011 | US20110108280 Method of testing a drilling riser connection |
| 05/12/2011 | US20110108276 Apparatus and method for creating pressure pulses in a wellbore |
| 05/12/2011 | US20110108274 Additive for well cementing applications |
| 05/12/2011 | CA2778610A1 Systems and methods for initiating annular obstruction in a subsurface well |