| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 07/06/2011 | CN102116148A Machine exploitation test pipe string for floating drilling rig |
| 07/06/2011 | CN102116140A Construction method for enhancing extraction effect of ground coal bed gas |
| 07/06/2011 | CN102116139A Ash throwing type oil pipe plug |
| 07/06/2011 | CN102116138A Tapered release type tubing plug |
| 07/06/2011 | CN102116137A Blanking plug for eccentric water distributor |
| 07/05/2011 | US7971640 Method and device for setting a bottom packer |
| 07/05/2011 | US7971639 Device for conducting cementing operations and inflow regulation |
| 07/05/2011 | CA2685206C Use of elastomers to produce gels for treating a wellbore |
| 07/05/2011 | CA2655348C Methods for allowing multiple fractures to be formed in a subterranean formation from an open hole well |
| 07/05/2011 | CA2652068C Push / pull unit and support structure for snubbing unit or the like on a rig floor |
| 07/05/2011 | CA2601902C Low density cements for use in cementing operations |
| 07/05/2011 | CA2580637C Foamed cement compositions and associated methods of use |
| 06/30/2011 | WO2011079265A2 High expansion metallic seal |
| 06/30/2011 | WO2011079264A2 High expansion metallic seal |
| 06/30/2011 | WO2011079169A2 Hydraulic deployment of a well isolation mechanism |
| 06/30/2011 | WO2011078690A1 Method for water tightening of water bearing zones and stabilization of sand in underground constructions |
| 06/30/2011 | WO2011077337A2 Chemical diversion technique |
| 06/30/2011 | WO2011041550A3 Subsea control system with interchangeable mandrel |
| 06/30/2011 | WO2011038009A3 Use of foam shaper memory polymer to transport acid or other wellbore treatments |
| 06/30/2011 | WO2011027100A3 Improved methods of fluid placement and diversion in subterranean formations |
| 06/30/2011 | WO2011023934A3 Sonically activating settable compositions and methods of activating them |
| 06/30/2011 | WO2010136806A3 An active external casing packer (ecp) for frac operations in oil and gas wells |
| 06/30/2011 | US20110156357 Dynamic seal member |
| 06/30/2011 | US20110156356 Seal member |
| 06/30/2011 | US20110156355 Seal member |
| 06/30/2011 | US20110155396 System, method, and device for actuating a downhole tool |
| 06/30/2011 | US20110155386 Multi-Deployable Subsea Stack System |
| 06/30/2011 | US20110155374 Method for treating well bore with polyurethane composition |
| 06/30/2011 | US20110155373 System and method for reducing foam in mixing operations |
| 06/30/2011 | CA2785090A1 Chemical diversion technique |
| 06/29/2011 | EP2337926A1 Shunt tube flowpaths extending through swellable packers |
| 06/29/2011 | CN201884001U Automatic pressure-relief oil nozzle for flowing well |
| 06/29/2011 | CN201884000U Cemented pipe column |
| 06/29/2011 | CN201883999U Novel turbine type downhole vibration cementing device |
| 06/29/2011 | CN201883998U Special tool for mounting rubber stopper in cement casing head for well cementation of oil field |
| 06/29/2011 | CN201883997U Drill-free cementing device of horizontal well |
| 06/29/2011 | CN201883996U Multi-passage packer |
| 06/29/2011 | CN201883995U Compressed type test seal tool for directional well |
| 06/29/2011 | CN201883994U Self-pressure-retaining expansion open hole packer |
| 06/29/2011 | CN201883993U Dual-action external casing packer for viscous oil horizontal well |
| 06/29/2011 | CN201883992U Downhole tubing plug |
| 06/29/2011 | CN201883991U Compensation type multi-purpose annular blowout preventer |
| 06/29/2011 | CN201883990U Compensation type annular blowout preventing device |
| 06/29/2011 | CN201883989U Shearing full-closed ram blowout preventer having clamping function |
| 06/29/2011 | CN201883988U Novel tube hanger supporting device |
| 06/29/2011 | CN201883987U Underwater well head connector |
| 06/29/2011 | CN201883986U Following-type sealing device |
| 06/29/2011 | CN201883985U Multifunctional well sealer |
| 06/29/2011 | CN201883984U Special wellhead for electric submersible pump |
| 06/29/2011 | CN201883983U Rotary self-seal well sealing device |
| 06/29/2011 | CN201883982U Permanent magnet anti-theft annular wellhead combined device |
| 06/29/2011 | CN201883981U Hydraulic bailing wellhead sealer |
| 06/29/2011 | CN201883980U Anti-object falling mud scraping device |
| 06/29/2011 | CN201883979U Oil well blowout preventer |
| 06/29/2011 | CN201883978U Wellhead device with reverse compression function and centralizing function |
| 06/29/2011 | CN201883972U Packing filling device for oil well polished rod |
| 06/29/2011 | CN201883969U Electric pump cable lateral wing crossing and sealing device |
| 06/29/2011 | CN102112698A Load bearing assembly |
| 06/29/2011 | CN102108859A Method and device for separate layer pressure and fluid production section testing and negative pressure de-plugging for oilfield |
| 06/29/2011 | CN102108846A Followed vibration well cementation method |
| 06/29/2011 | CN102108845A Rotary blowout preventer |
| 06/29/2011 | CN102108844A Packer fixing ring and oil/water self-expandable packer with same |
| 06/28/2011 | US7967077 Interventionless set packer and setting method for same |
| 06/28/2011 | US7967074 Electric wireline insert safety valve |
| 06/28/2011 | US7967071 Electronic completion installation valve |
| 06/28/2011 | CA2629112C System and method for isolating and controlling flow in a well |
| 06/28/2011 | CA2412249C Leak remedy through sealants in local reservoirs |
| 06/23/2011 | WO2011075247A2 Retrieval method for opposed slip type packers |
| 06/23/2011 | WO2011075045A1 An arrangement for joining double-walled drill rods and double-walled drill rod |
| 06/23/2011 | WO2011074981A1 Method and device for closing a well |
| 06/23/2011 | WO2011073610A2 Sealing method and apparatus |
| 06/23/2011 | WO2011072803A2 Equipment for remote launching of cementing plugs |
| 06/23/2011 | WO2011072367A1 Downhole sub with hydraulically actuable sleeve valve |
| 06/23/2011 | US20110148044 High expansion metallic seal |
| 06/23/2011 | US20110148043 High expansion metallic seal |
| 06/23/2011 | US20110147623 Shear Block and Blade Interface and Method |
| 06/23/2011 | US20110147015 Seal Bore for High Expansion Bridge Plugs |
| 06/23/2011 | US20110147014 Control swelling of swellable packer by pre-straining the swellable packer element |
| 06/23/2011 | US20110147013 Retrieval Method For Opposed Slip Type Packers |
| 06/23/2011 | US20110147001 Wellhead annulus monitoring |
| 06/23/2011 | US20110146987 Chemical diversion technique |
| 06/23/2011 | US20110146986 Equipment for remote launching of cementing plugs |
| 06/23/2011 | US20110146984 Constant pressure open hole water packing system |
| 06/23/2011 | CA2782819A1 Retrieval method for opposed slip type packers |
| 06/23/2011 | CA2776560A1 Downhole sub with hydraulically actuable sleeve valve |
| 06/22/2011 | EP2336484A1 Blowout Preventer |
| 06/22/2011 | EP2336483A2 Underwater power generation |
| 06/22/2011 | EP2334905A2 Method of determining borehole conditions from distributed measurement data |
| 06/22/2011 | EP2334895A1 Multiple activation-device launcher for a cementing head |
| 06/22/2011 | EP2334894A1 Systems and methods of forming subsurface wellbores |
| 06/22/2011 | EP2334874A2 Device and method for activating or cleaning wells |
| 06/22/2011 | EP2150680B1 Rotating control device docking station |
| 06/22/2011 | CN201874543U Underground boosting water injection process pipe string |
| 06/22/2011 | CN201874527U Wellhead ground safety control system |
| 06/22/2011 | CN201874522U Valve anti-theft device |
| 06/22/2011 | CN201874518U Multistage packing bridge plug |
| 06/22/2011 | CN201874517U Compression type packer sealing cylinder used in oil and gas field |
| 06/22/2011 | CN201874516U Sectional well completion packer for thermal production of heavy oil wells |
| 06/22/2011 | CN201874515U Compression type packer sealing cylinder used in oil and gas field |
| 06/22/2011 | CN201874514U Sealing barrel for compression type packers for oil-gas fields |