| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 03/31/2011 | US20110073328 Actuation Assembly and Method for Actuating a Downhole Tool |
| 03/31/2011 | US20110073326 Anchor Assembly and Method for Anchoring a Downhole Tool |
| 03/31/2011 | US20110073325 Torque resistant coupling for oilwell toolstring |
| 03/31/2011 | US20110073321 Tubular actuator and method |
| 03/31/2011 | US20110073320 Tubular actuator and method |
| 03/31/2011 | US20110073318 Producing gas and liquid from below a permanent packer in a hydrocarbon well |
| 03/31/2011 | US20110073310 Through Tubing Bridge Plug and Installation Method for Same |
| 03/31/2011 | CA2847489A1 Cement compositions and methods utilizing nano-clay |
| 03/31/2011 | CA2847401A1 Cement compositions and methods utilizing nano-clay |
| 03/31/2011 | CA2774100A1 Use of foam shaper memory polymer to transport acid or other wellbore treatments |
| 03/31/2011 | CA2773648A1 Method and apparatus for determining locations of multiple casings within a wellbore conductor |
| 03/30/2011 | EP2302161A1 Method for removing a sealing plug from a well |
| 03/30/2011 | EP1875323B1 Control system design for a mixing system with multiple inputs |
| 03/30/2011 | CN201780191U Curve type adjustable leaking-stoppage experimental package device |
| 03/30/2011 | CN201779428U Cooling lubricating pump station of rotary control head |
| 03/30/2011 | CN201778817U Sealing checker of water injection well |
| 03/30/2011 | CN201778799U Pipe column structure of underground straddle type packing layer-by-layer fracture acidizing tool for oil and gas well |
| 03/30/2011 | CN201778781U Sand jamming prevention oil extraction production tubular column |
| 03/30/2011 | CN201778767U Integrated pipe string for looking for water proofing, water plugging, acidification and plugging breaking |
| 03/30/2011 | CN201778759U Underground tubing-casing annulus pressure-reducing device |
| 03/30/2011 | CN201778755U Wellhead guiding nozzle of flowing well |
| 03/30/2011 | CN201778752U Cementing construction parameter monitoring device |
| 03/30/2011 | CN201778751U Slide bushing type drill-free stage collar |
| 03/30/2011 | CN201778750U Suspension compression fracture packer |
| 03/30/2011 | CN201778749U Packer |
| 03/30/2011 | CN201778748U Expanding open-hole packer |
| 03/30/2011 | CN201778747U Controllable packer |
| 03/30/2011 | CN201778746U Cup packer capable of oil drainage |
| 03/30/2011 | CN201778745U Sleeve protection packer used in horizontal well fracture |
| 03/30/2011 | CN201778744U Oil well releasing packer |
| 03/30/2011 | CN201778743U Dropping-prevention device in sleeve |
| 03/30/2011 | CN201778742U Rotary connecting sealing device |
| 03/30/2011 | CN201778741U Oilfield underground device for preventing objects from falling off |
| 03/30/2011 | CN201778740U Marine underwater parallel double-hydraulic-cylinder gate plate blowout preventer |
| 03/30/2011 | CN201778739U Blowout preventer wellhead detecting device |
| 03/30/2011 | CN201778738U Energy storage pressure stabilizing controller of annular preventer |
| 03/30/2011 | CN201778737U Multifunctional composite sealing blowout preventer |
| 03/30/2011 | CN201778736U Anti-corrosion cap for underwater well head |
| 03/30/2011 | CN201778735U Steel wire rope blanking plug for subsea production tree |
| 03/30/2011 | CN201778734U Cable penetration device of tubing hanger of subsea production tree |
| 03/30/2011 | CN201778733U Hydraulic penetration device between subsea production tree and tubing hanger |
| 03/30/2011 | CN201778732U Oil pipe hanger for marine underwater upright oil production tree |
| 03/30/2011 | CN201778731U Oil pipe hanger for marine underwater horizontal oil production tree |
| 03/30/2011 | CN201778730U Vertical subsea production tree |
| 03/30/2011 | CN201778729U Anti-freezing choke plug |
| 03/30/2011 | CN201778728U Packing box press cover hanging device |
| 03/30/2011 | CN201778727U Pumping well polished rod lubricating device |
| 03/30/2011 | CN201778726U Special combination tool for well head in oil field |
| 03/30/2011 | CN201778725U Anti-theft clamp for mouth of oil and water well |
| 03/30/2011 | CN201778724U Jack-screw type gland for packing box |
| 03/30/2011 | CN201778723U Deviation-regulating packing box moving with polish rod |
| 03/30/2011 | CN201778722U Anti-release device for packing box pressure cap |
| 03/30/2011 | CN201778721U Packing box for oil well |
| 03/30/2011 | CN201778720U Hydraulic leaking stoppage tool |
| 03/30/2011 | CN201778719U Floating self-sealing well sealing device |
| 03/30/2011 | CN201778689U Rotatable BOP maintenance operating board for petroleum drilling rig |
| 03/30/2011 | CN201778687U Workover rig under pressure for wellhead |
| 03/30/2011 | CN201778683U Stinger centralizing guide device for inner tube cementing |
| 03/30/2011 | CN101994509A Multipurpose ultrahigh-pressure packer tester |
| 03/30/2011 | CN101994497A Cement slurry process for exploratory well cementation in oil and gas field areas |
| 03/30/2011 | CN101993684A Temporary plugging agent for acidization of water injection well of low permeability reservoir |
| 03/30/2011 | CN101230778B Technique of gas drilling post-infusion cement slurry |
| 03/29/2011 | US7914266 Submersible pumping system and method for boosting subsea production flow |
| 03/29/2011 | US7913770 Controlled pressure equalization of atmospheric chambers |
| 03/29/2011 | US7913769 Downhole safety valve apparatus and method |
| 03/29/2011 | US7913760 Seal configuration for top drive swivel apparatus and method |
| 03/29/2011 | US7913757 Methods of formulating a cement composition |
| 03/29/2011 | US7913716 Sealing element and a coupling device provided with such a sealing element |
| 03/29/2011 | CA2670569C Snorkel device for flow control |
| 03/29/2011 | CA2457672C Downhole nmr processing |
| 03/24/2011 | WO2011034695A2 Fracturing and gravel packing tool with multi movement wash pipe valve |
| 03/24/2011 | WO2011032289A1 Offshore casing drilling method |
| 03/24/2011 | WO2010146402A3 Blowout preventer |
| 03/24/2011 | WO2010135149A3 Selective plug and method |
| 03/24/2011 | WO2010135148A3 Selective plug and method |
| 03/24/2011 | WO2010135115A3 Dissolvable downhole tool, method of making and using |
| 03/24/2011 | WO2010135114A3 Pressure testable tubing connection |
| 03/24/2011 | WO2010132345A3 Fracturing with telescoping members and sealing the annular space |
| 03/24/2011 | WO2010129678A3 Selectively movable seat arrangement and method |
| 03/24/2011 | US20110067890 Wellbore fluid treatment process and installation |
| 03/24/2011 | US20110067889 Expandable and degradable downhole hydraulic regulating assembly |
| 03/24/2011 | US20110067888 Plug counter and method |
| 03/24/2011 | US20110067884 System and Method of Controlling Surge During Wellbore Completion |
| 03/24/2011 | US20110067869 In situ decomposition of carbonyls at high temperature for fixing incomplete and failed well seals |
| 03/24/2011 | US20110067868 Self adaptive cement systems |
| 03/24/2011 | US20110067867 Wellbore Servicing Fluid Compositions and Use Thereof |
| 03/24/2011 | US20110067866 Equipment for remote launching of cementing plugs |
| 03/24/2011 | US20110067865 Equipment for remote launching of cementing plugs |
| 03/24/2011 | US20110067864 Compositions for Improving Thermal Conductivity of Cement Systems |
| 03/24/2011 | US20110067855 Geothermal liner system with packer |
| 03/24/2011 | CA2774305A1 Offshore casing drilling method |
| 03/23/2011 | EP2299051A2 Stabplate connections |
| 03/23/2011 | EP2297427A1 Cementing sub for annulus cementing |
| 03/23/2011 | EP2297426A2 Choke trim assembly |
| 03/23/2011 | EP2158380B1 Barrier for instrumentation piping |
| 03/23/2011 | EP1740795B8 Multizone stimulation using wax balls |
| 03/23/2011 | CN201771469U Tool for oil well filling and backwashing |
| 03/23/2011 | CN201771468U Packer using perforation and testing combined technology |
| 03/23/2011 | CN201771467U Under-balance well completion tool |
| 03/23/2011 | CN201771466U Rolling device for drilling and leak stopping |