| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 01/01/2014 | CN103485746A Packer for horizontal well dimension fracturing |
| 01/01/2014 | CN103485745A Expandable leakproof well cleanout packer |
| 01/01/2014 | CN103485744A Separated zone water injection centralizing type packer of directional well |
| 01/01/2014 | CN103485743A Oil layer leak-proof device |
| 01/01/2014 | CN103485742A Mechanical sealing plug capable of quickly and simply stopping mortar/water and mounting method of mechanical sealing plug |
| 01/01/2014 | CN103485741A Internal tree cap and itc running tool |
| 01/01/2014 | CN103485740A Internal tree cap and itc running tool |
| 01/01/2014 | CN103485739A Expansion type thermal production well tail pipe suspension device |
| 01/01/2014 | CN103485352A Construction method for blocking depressurization well by adopting accelerated cement |
| 01/01/2014 | CN102493777B Hydraulic release plugging device |
| 01/01/2014 | CN102251756B Mountain flour plugging method |
| 01/01/2014 | CN102116138B Tapered release type tubing plug |
| 01/01/2014 | CN102112698B Load bearing assembly |
| 01/01/2014 | CN102080514B Mechanical parameter measuring device of underground compression type packer and using method thereof |
| 01/01/2014 | CN101906955B Oil and gas well underground straddle packing layer-by-layer fracture acidizing tool tubular column structure |
| 01/01/2014 | CN101881142B Self-sealing setting ball seat |
| 01/01/2014 | CN101761319B Method for injecting injection fluid by outside-tube chemical packer |
| 12/31/2013 | US8616278 Creation of a hydrate barrier during in situ hydrocarbon recovery |
| 12/31/2013 | US8616276 Remotely activated downhole apparatus and methods |
| 12/31/2013 | CA2790667C Methods and compositions for preventing high density well completion fluid loss |
| 12/31/2013 | CA2756958C Emergency bowl for deploying control line from casing head |
| 12/31/2013 | CA2743638C Use of swellable material in an annular seal element to prevent leakage in a subterranean well |
| 12/31/2013 | CA2662210C Internal breaker for oilfield treatments |
| 12/31/2013 | CA2640408C Cement composition for carbon dioxide supercritical environment |
| 12/31/2013 | CA2588840C A method and device for fluid displacement |
| 12/31/2013 | CA2571100C Method and apparatus to provide electrical connection in a wellhead for a downhole electrical device |
| 12/29/2013 | CA2819808A1 Downhole shut-in device for pressure variation testing in gas lift wells |
| 12/27/2013 | WO2013192485A2 Metal to metal packoff for use in a wellhead assembly |
| 12/27/2013 | WO2013192154A1 An electromagnetic actuator for a blowout preventer |
| 12/27/2013 | WO2013192062A1 Downhole seal element of changing elongation properties |
| 12/27/2013 | WO2013191783A2 Multi-barrier seal system |
| 12/27/2013 | WO2013191742A1 Compositions and processes for downhole cementing operations |
| 12/27/2013 | WO2013191687A1 Swellable packer with enhanced operating envelope |
| 12/27/2013 | WO2013190291A2 Seal assembly for a downhole device |
| 12/27/2013 | WO2013188906A1 Inflatable borehole plug and inflation medium |
| 12/27/2013 | WO2013188903A1 An apparatus, system and method for actuating downhole tools in subsea drilling operations |
| 12/27/2013 | WO2013101715A3 Downhole tool with pumpable section |
| 12/27/2013 | WO2013032344A3 Subsea control modules and methods related thereto |
| 12/27/2013 | WO2012123694A3 Subsea electric actuators and latches for them |
| 12/27/2013 | CA2877677A1 Compositions and processes for downhole cementing operations |
| 12/27/2013 | CA2877535A1 Drive systems for use with long lateral completion systems and methods |
| 12/27/2013 | CA2876493A1 Metal to metal packoff for use in a wellhead assembly |
| 12/26/2013 | US20130341870 Multi-barrier seal system |
| 12/26/2013 | US20130341539 Valve apparatus |
| 12/26/2013 | US20130341538 Fiber Reinforced Elastomer Anisotropic Annular Blowout Preventer |
| 12/26/2013 | US20130341052 Seal element guide |
| 12/26/2013 | US20130341051 Metal to metal packoff for use in a wellhead assembly |
| 12/26/2013 | US20130341040 Snubbing assemblies and methods for inserting and removing tubulars from a wellbore |
| 12/26/2013 | US20130341032 Subsea wellhead |
| 12/26/2013 | US20130341021 Leak diverter assembly for substation transformers |
| 12/26/2013 | US20130341016 Sampling Assembly With Outer Layer Of Rings |
| 12/26/2013 | US20130341014 Method of placing ball sealers for fluid diversion |
| 12/25/2013 | EP2675992A1 Well barrier |
| 12/25/2013 | EP2675991A2 Extrusion-resistant seals for expandable tubular assembly |
| 12/25/2013 | EP2675990A2 Anchoring seal |
| 12/25/2013 | EP2675989A2 Stage tool |
| 12/25/2013 | EP2675988A1 Mechanical liner drilling cementing system |
| 12/25/2013 | EP2479376B1 Annular barrier with a diaphragm |
| 12/25/2013 | EP2278117B1 Adjustable wireline sheave for wireline pulley |
| 12/25/2013 | CN203362107U Salvageable and drillable suspension bridge plug |
| 12/25/2013 | CN203362106U Mechanical repeated releasing production packer |
| 12/25/2013 | CN203362105U Packer capable of opening step by step |
| 12/25/2013 | CN203362104U Sand-up prevention packer |
| 12/25/2013 | CN203362103U Plugging device for high-precision radial drill holes inside rock-plug blasting cave |
| 12/25/2013 | CN203362102U Straddle type packer capable of repeatedly conducting setting |
| 12/25/2013 | CN203362101U Blowout preventer for continuous sucker rod |
| 12/25/2013 | CN203362100U Wellhead oil-gas mixing transportation device |
| 12/25/2013 | CN203362099U Drilled-hole high-pressure water blocking device |
| 12/25/2013 | CN203362098U Ultrahigh-pressure coiled tubing fracture wellhead device |
| 12/25/2013 | CN203362097U Novel blowout-resisting well mouth oil extraction tree |
| 12/25/2013 | CN203362096U Protection device used for karst water monitoring well opening |
| 12/25/2013 | CN203362095U Encrypting lock well-sealing device |
| 12/25/2013 | CN203362094U Wellhead stabilizer |
| 12/25/2013 | CN203362084U Blowout preventer installation device of oil drilling platform |
| 12/25/2013 | CN203362054U Combination device with function of casing placement through buoyancy and function of well cementation through check valves |
| 12/25/2013 | CN103477025A Tubular actuating system and method |
| 12/25/2013 | CN103477024A Method and device for extending at least the lifetime of a christmas tree or an umbilical |
| 12/25/2013 | CN103470222A Underbalance well-completion tubing and gas lifting production combined method |
| 12/25/2013 | CN103470221A Underbalance tubing, no-killing gas lifting, shaft pumping and pump detecting combined method |
| 12/25/2013 | CN103470214A Multistage hydraulic bridge plug setting device |
| 12/25/2013 | CN103470213A Pressure-bearing test device for multi-pressure-bearing crack temporary plugging agent |
| 12/25/2013 | CN103470212A Device and method for active hole drilling and sealing |
| 12/25/2013 | CN103470211A Claw-sleeve anti-setting packer |
| 12/25/2013 | CN103470210A Fixture block type anti-setting packer |
| 12/25/2013 | CN103470209A Reliable packer |
| 12/25/2013 | CN103470208A Recyclable run-in-hole blockage tool for oil and gas field |
| 12/25/2013 | CN103470207A Annular preventer with internally-arranged circulating water cooling system |
| 12/25/2013 | CN103470206A Method for preventing blowout |
| 12/25/2013 | CN103468231A Silane coupler-coated self-repairing agent as well as preparation and application thereof |
| 12/25/2013 | CN102518397B Tension mooring type underwater drilling system and mounting method for same |
| 12/25/2013 | CN102383757B Connection device for underwater production tree cup |
| 12/25/2013 | CN102134982B Multilayer gravel packing method and tool |
| 12/24/2013 | US8613321 Bottom hole assembly with ported completion and methods of fracturing therewith |
| 12/24/2013 | US8613320 Compositions and applications of resins in treating subterranean formations |
| 12/24/2013 | US8613319 Lost-circulation material made from a recycled material containing asphalt |
| 12/24/2013 | CA2758311C Well treatment compositions and methods utilizing nano-particles |
| 12/24/2013 | CA2755299C Modular backup fluid supply system |
| 12/24/2013 | CA2743504C Methods for minimizing fluid loss to and determining the locations of lost circulation zones |
| 12/24/2013 | CA2678819C Downhole apparatus with packer cup and slip |
| 12/21/2013 | CA2780546A1 Tubular downhole patch for sealing a leak in the casing of a well |