| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
|---|
| 09/04/2013 | CN203175459U Setting ball seat |
| 09/04/2013 | CN203175458U Drilled hole anti-splash device |
| 09/04/2013 | CN203175457U Well mouth sealing element |
| 09/04/2013 | CN203175456U High-efficiency plugging and pressure-releasing device of oil pipe |
| 09/04/2013 | CN203175455U Well shut-in device with internal thread well shut-in pipe nipple |
| 09/04/2013 | CN203175454U High temperature test wellhead blowout preventer |
| 09/04/2013 | CN203175453U Process interface pressurizing disassembly-prevention plug structure of mechanical oil extraction well opening device |
| 09/04/2013 | CN203175416U Improved tubing head for low-pressure acidity gas well repair |
| 09/04/2013 | CN103277067A Horizontal well eccentric annulus displacement parameter optimizing method |
| 09/04/2013 | CN103277066A Methods and compositions relating to minimizing particulate migration over long intervals |
| 09/04/2013 | CN103277065A Underwater Christmas tree cap |
| 09/04/2013 | CN103277064A Hydraulic oil-well blowout preventing device |
| 09/04/2013 | CN103277063A Tangential vortex annulus fracturing wellhead device |
| 09/04/2013 | CN103277060A Mechanical-hydraulic double-acting release rotary tail pipe hanger |
| 09/04/2013 | CN103275682A Emulsified acid for water plugging of oil well, preparation method of emulsified acid and oil well water-plugging method using emulsified acid |
| 09/04/2013 | CN102128014B Electric bailing well opening anti-theft cap |
| 09/04/2013 | CN102071916B Jet pump thereof |
| 09/04/2013 | CN101864904B Operation device for stripping sucker rod at pressure |
| 09/04/2013 | CN101575966B Method for water plugging and profile controlling of underground polymerization of oil exploitation sludge |
| 09/03/2013 | US8527100 Method of providing a flow control device that substantially reduces fluid flow between a formation and a wellbore when a selected property of the fluid is in a selected range |
| 09/03/2013 | US8524638 Method to characterize fracture plugging efficiency for drilling fluids |
| 09/03/2013 | US8522873 Spacer fluids containing cement kiln dust and methods of use |
| 09/03/2013 | US8522872 In situ decomposition of carbonyls at high temperature for fixing incomplete and failed well seals |
| 09/03/2013 | CA2745632C Two-stage submersible actuators |
| 09/03/2013 | CA2689480C Dual isolation mechanism of cementation port |
| 08/29/2013 | WO2013126827A2 Latch assembly |
| 08/29/2013 | WO2013126822A2 Subsea casing drilling system |
| 08/29/2013 | WO2013126233A1 Improving shear bond strength of set cement |
| 08/29/2013 | WO2013126194A1 Expandable conical tubing run through production tubing and into open hole |
| 08/29/2013 | WO2013126193A1 Enhanced expandable tubing run through production tubing and into open hole |
| 08/29/2013 | WO2013126192A1 Flow control devices on expandable tubing run through production tubing and into open hole |
| 08/29/2013 | WO2013126191A1 Expandable tubing run through production tubing and into open hole |
| 08/29/2013 | WO2013126190A1 Expandable tubing run through production tubing and into open hole |
| 08/29/2013 | WO2013126114A2 Acoustic frequency interrogation and data system |
| 08/29/2013 | WO2012123087A3 Pre-tensioned connector |
| 08/29/2013 | US20130221250 Position Data Based Method, Interface and Device For Blowout Preventer |
| 08/29/2013 | US20130220644 Enhanced Expandable Tubing Run Through Production Tubing and Into Open Hole |
| 08/29/2013 | US20130220643 Expandable Tubing Run Through Production Tubing and Into Open Hole |
| 08/29/2013 | US20130220642 Expandable Tubing Run Through Production Tubing and Into Open Hole |
| 08/29/2013 | US20130220641 Expandable Conical Tubing Run Through Production Tubing and Into Open Hole |
| 08/29/2013 | US20130220640 Flow Control Devices on Expandable Tubing Run Through Production Tubing and Into Open Hole |
| 08/29/2013 | US20130220639 System and method for raially expanding a tubular element comprising an emergency blow-out preventer |
| 08/29/2013 | US20130220631 Well emergency separation tool for use in separating a tubular element |
| 08/29/2013 | US20130220630 Method and apparatus for forming elongated composite tubular |
| 08/29/2013 | US20130220628 High-Pressure Cap Equalization Valve |
| 08/29/2013 | US20130220627 High Energy Tubular Shear |
| 08/29/2013 | US20130220626 Shear laser module and method of retrofitting and use |
| 08/29/2013 | US20130220612 Shear Bond Strength of Set Cement |
| 08/29/2013 | US20130220610 Methods and multi-purpose apparatus for dispensing and circulating fluid in wellbore casing |
| 08/29/2013 | US20130220609 Hard Bottom Cement Seal For Improved Well Control |
| 08/29/2013 | US20130220608 Modified particulate weighting agents and methods of using the same |
| 08/29/2013 | US20130220593 Combination swivel and ball dropper |
| 08/28/2013 | EP2631419A1 Rotating control head radial seal protection and leak detection systems |
| 08/28/2013 | EP2630333A2 System and method related to a sampling packer |
| 08/28/2013 | EP2630327A1 Tools and methods for use in completion of a wellbore |
| 08/28/2013 | EP2630324A2 Latching apparatus and method |
| 08/28/2013 | EP2630323A2 Apparatus and methods for restricting flow in a bore |
| 08/28/2013 | CN203162145U Sealing structure for side door of blowout preventer |
| 08/28/2013 | CN203161216U Quantitative simulation evaluation device of flushing efficiency of well cementing flushing fluid |
| 08/28/2013 | CN203161185U Underground production pipe column provided with double electric pumps |
| 08/28/2013 | CN203161168U Double valve cover hinge type self-grouting float collar |
| 08/28/2013 | CN203161167U Special drill rod swirl generator for setting cement plug during drilling |
| 08/28/2013 | CN203161166U Internal-positioning type float collar |
| 08/28/2013 | CN203161165U Inner inserting well cementation rig tool |
| 08/28/2013 | CN203161164U Anchor packer with well flushing function |
| 08/28/2013 | CN203161163U Suspension packer |
| 08/28/2013 | CN203161162U Pressure control ring |
| 08/28/2013 | CN203161161U Device for sealing holes by pressing-injecting polyurethane |
| 08/28/2013 | CN203161160U Blowout preventer wedge disc |
| 08/28/2013 | CN203161159U Mining underground drilling blowout preventer |
| 08/28/2013 | CN203161158U Slip type casing hanger |
| 08/28/2013 | CN203161157U Plugging device for mine drilling hole water leakage |
| 08/28/2013 | CN203161156U Four-way blowout wrecking device for oilfield |
| 08/28/2013 | CN203161155U Flexible rod sealing device |
| 08/28/2013 | CN203161154U Well logging oiling sealing head lubricating device |
| 08/28/2013 | CN203161153U Oil-sucking rod well fast-sealing device |
| 08/28/2013 | CN203161152U Sucker rod self-sealing preventer |
| 08/28/2013 | CN203161142U Anti-fall valvular slip hydraulic hanging packer |
| 08/28/2013 | CN203152751U Sun-shading device for operating board of well cementing truck |
| 08/28/2013 | CN103266913A Gas extraction method |
| 08/28/2013 | CN103266876A Fracturing working method of multilevel hydraulic spraying segmentation fracturing tubular column |
| 08/28/2013 | CN103266875A Fracturing operation method of multistage hydraulic jet staged fracturing tubular column |
| 08/28/2013 | CN103266873A Connecting structure of multilevel hydraulic spraying segmentation fracturing tubular column |
| 08/28/2013 | CN103266865A Large-drift-diameter packer used for oil well |
| 08/28/2013 | CN103266864A Internal spray-resisting burglar alarm of sleeve pipe |
| 08/28/2013 | CN103265238A Modified cement-water glass slurry and application method thereof |
| 08/28/2013 | CN102182423B Sleeve valve opening/closing device |
| 08/28/2013 | CN102134990B Cement head magnetic induction rubber plug indicator |
| 08/28/2013 | CN102031942B On-site construction process of water base barite liquid plugging agent with heat sensitive characteristic |
| 08/28/2013 | CN101675209B Method and apparatus for measuring parameter within the well with plug |
| 08/27/2013 | US8518861 Solid zirconium-based cross-linking agent and use in oil field applications |
| 08/27/2013 | US8517103 Oil or gas treatment fluid containing a chelate or coordination complex that sets |
| 08/27/2013 | US8517101 Cementing composition comprising within un-reacted cement |
| 08/27/2013 | US8517100 Compositions and methods for cleaning a wellbore prior to cementing |
| 08/27/2013 | US8517089 Casing hanger profile for multiple seal landing positions |
| 08/27/2013 | CA2704432C Copolymer based on a compound comprising sulfonic acid |
| 08/22/2013 | WO2013123207A2 Methods and compositions comprising cement kiln dust having an altered particle size |
| 08/22/2013 | WO2013122985A1 Apparatus and method for protecting devices downhole |
| 08/22/2013 | WO2013122647A1 Seal molding sleeve |
| 08/22/2013 | WO2013122480A1 Method for establishment of a new well path from an existing well |