| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 01/23/2013 | CN202689977U Cavitation negative pressure flowback device |
| 01/23/2013 | CN102892971A Blowout preventer assembly |
| 01/23/2013 | CN102889069A Energy-saving oil extracting device |
| 01/23/2013 | CN102889068A Hole sealing device and method |
| 01/23/2013 | CN102889067A Well fixing device capable of being multi-directionally vibrated |
| 01/23/2013 | CN102889066A Automatic throttling manifold for pressure control drilling |
| 01/23/2013 | CN102003173B System and method for automatically measuring and recording gas pressure during coal seam hole sealing |
| 01/23/2013 | CN101915070B Expanding open hole packer |
| 01/23/2013 | CN101435318B Non-drill cementing well method and pipe column |
| 01/23/2013 | CN101395339B Method and apparatus to cement a perforated casing |
| 01/22/2013 | US8356661 Combination swivel and ball dropper |
| 01/22/2013 | CA2782859C Rotating pressure control head |
| 01/22/2013 | CA2656619C Method for improved well control with a downhole device |
| 01/22/2013 | CA2513974C Rotating pressure control head |
| 01/20/2013 | CA2783442A1 Rotating flow control devices having stabilized bearings |
| 01/17/2013 | WO2013009458A2 Remotely activated downhole apparatus and methods |
| 01/17/2013 | WO2013009455A2 Remotely activated downhole apparatus and methods |
| 01/17/2013 | WO2013009438A2 Covered retaining shoe configurations for use in a downhole tool |
| 01/17/2013 | WO2013006963A1 Internal riser rotating flow control device |
| 01/17/2013 | WO2012161961A3 Verification of swelling in a well |
| 01/17/2013 | WO2012158372A3 Tubular cutting with a sealed annular space and fluid flow for cuttings removal |
| 01/17/2013 | WO2012158367A3 Multi-position mechanical spear for multiple tension cuts while removing cuttings |
| 01/17/2013 | WO2012127180A3 Sealing assembly |
| 01/17/2013 | WO2012115889A3 Expandable packer with expansion induced axially movable support feature |
| 01/17/2013 | US20130014959 Remotely Activated Downhole Apparatus and Methods |
| 01/17/2013 | US20130014958 Retrievable stimulation frac (rsf) plug |
| 01/17/2013 | US20130014956 Wellbore circulation tool and method |
| 01/17/2013 | US20130014949 Double swivel apparatus and method |
| 01/17/2013 | US20130014948 Apparatus And Methods For Deploying Cementing Plugs |
| 01/17/2013 | US20130014941 Remotely Activated Downhole Apparatus and Methods |
| 01/17/2013 | US20130014938 Apparatus for stage-cementing an oil well |
| 01/17/2013 | US20130014936 Ball injecting apparatus for wellbore operations with external loading port |
| 01/17/2013 | US20130014933 Device for a Plug Construction for Conducting Well Tests |
| 01/17/2013 | CA2841609A1 Internal riser rotating flow control device |
| 01/17/2013 | CA2839010A1 Remotely activated downhole apparatus and methods |
| 01/17/2013 | CA2839002A1 Remotely activated downhole apparatus and methods |
| 01/16/2013 | EP2546557A1 Multi-elastomer seal |
| 01/16/2013 | EP2546454A1 Dc powered subsea inverter |
| 01/16/2013 | EP2545246A2 Seal assembly and method of forming a seal assembly |
| 01/16/2013 | CN202673233U Slurry stopping device for hydraulic rock drilling trolleys |
| 01/16/2013 | CN202673232U Float collar structure of integral basket seats |
| 01/16/2013 | CN202673231U Float collar structure for spherical surface and conical surface being sealed in matching manner |
| 01/16/2013 | CN202673230U Nitrogen foam cement slurry bubble generator |
| 01/16/2013 | CN202673229U High-pressure filling hole sealing device |
| 01/16/2013 | CN202673228U Anti-backflow sleeve sealing device |
| 01/16/2013 | CN202673227U Novel underwater manifold package |
| 01/16/2013 | CN202673226U Environment-friendly oil extraction broken rod well shut packing box |
| 01/16/2013 | CN202673225U Anti-sand wellhead assembly for extruded gravel filling |
| 01/16/2013 | CN202673224U Self-uprighting wellhead sealing energy-saving adjustment device |
| 01/16/2013 | CN202673223U Composite sealing structure |
| 01/16/2013 | CN202673212U Integral hanger for hydraulic cylinder piston |
| 01/16/2013 | CN202673211U Tie-back inserting sealing tail pipe hanger |
| 01/16/2013 | CN202673188U Logging blowout prevention pipe hydraulic pressure lifting device |
| 01/16/2013 | CN102877882A Method for plugging methane gas extraction hole |
| 01/16/2013 | CN102877881A Supporting device used for hydrofracture hole-sealing capsule |
| 01/16/2013 | CN102877826A Internal closed logging device |
| 01/16/2013 | CN102877821A Thickened oil steam huff and puff injection-production integrated device |
| 01/16/2013 | CN102877813A Halfway gas-filling well cementing method |
| 01/16/2013 | CN102877812A Method of balancing pressure for well cementation |
| 01/16/2013 | CN102877811A Selective water plugging ball for profile control of water injection well and preparation method and application of selective water plugging ball |
| 01/16/2013 | CN102877810A Casing hanger and seal lowering tool for ocean deepwater drilling |
| 01/16/2013 | CN102876305A Oil well water shutoff agent and oil well water shutoff method |
| 01/16/2013 | CN102876304A Bottom water plugging agent system and process for horizontal well |
| 01/16/2013 | CN101748983B Protector for oil pipe working under pressure used for oil well |
| 01/16/2013 | CN101644148B Non-smooth flexible rope corrugated pipe wellhead sealing device |
| 01/15/2013 | US8353497 Variable radius annular and ram packing unit and method |
| 01/15/2013 | US8353355 Drill string/annulus sealing with swellable materials |
| 01/15/2013 | US8353345 Geothermal well diversion agent formed from in situ decomposition of carbonyls at high temperature |
| 01/15/2013 | US8353338 Well bore control valve |
| 01/15/2013 | CA2746598A1 Ball injecting apparatus for wellbore operations with external loading port |
| 01/15/2013 | CA2704834C Screened valve system for selective well stimulation and control |
| 01/15/2013 | CA2600602C Annulus pressure control drilling systems and methods |
| 01/13/2013 | CA2746171A1 Retrievable stimulation frac (rsf) plug |
| 01/10/2013 | WO2013006208A2 Cable compatible rig-less operable annuli engagable system for using and abandoning a subterranean well |
| 01/10/2013 | WO2013003939A1 Cement head with hammer union |
| 01/10/2013 | WO2012151146A3 Single upset landing string running system |
| 01/10/2013 | WO2012148979A3 Systems and methods for making subsea fluid conduit connections |
| 01/10/2013 | WO2012145506A3 Tubular actuating system and method |
| 01/10/2013 | WO2012079914A3 Plugging device |
| 01/10/2013 | WO2012079913A3 Plugging device |
| 01/10/2013 | WO2012027002A3 Modular subsea completion |
| 01/10/2013 | US20130009366 Low Profile Rotating Control Device |
| 01/10/2013 | US20130008673 Covered Retaining Shoe Configurations for Use in a Downhole Tool |
| 01/10/2013 | US20130008672 Annulus Seal Utilizing Energized Discrete Soft Interfacial Sealing Elements |
| 01/10/2013 | US20130008671 Wellbore plug and method |
| 01/10/2013 | US20130008670 Safety system for oil and gas drilling operations |
| 01/10/2013 | US20130008661 Subsea well intervention module |
| 01/10/2013 | US20130008654 Method for Drilling and Completion Operations with Settable Resin Compositions |
| 01/10/2013 | US20130008653 Wellbore laser operations |
| 01/10/2013 | US20130008643 Downhole sealing device and method of making |
| 01/10/2013 | US20130008642 Combination swivel and ball dropper |
| 01/10/2013 | CA2841144A1 Cable compatible rig-less operable annuli engagable system for using and abandoning a subterranean well |
| 01/09/2013 | EP2543811A1 Subsea electronics module |
| 01/09/2013 | EP2542756A2 System and method for fluid diversion and fluid isolation |
| 01/09/2013 | EP2542755A1 Tattle-tale apparatus |
| 01/09/2013 | EP2542751A2 Super shoe swell packer |
| 01/09/2013 | CN202659223U Blowout preventing type eccentricity testing screw pump driving device with underneath type seals |
| 01/09/2013 | CN202659210U First class half-path well cementing plunger capable of releasing pressure and preventing backflow |
| 01/09/2013 | CN202659209U Hydraulic reverse boring drilling-plug-free stage collar |
| 01/09/2013 | CN202659208U Downhole operation blowout preventer pressure bearing free device |