| Patents for E21B 21 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor (13,780) |
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| 06/27/2013 | WO2013095419A1 Functionalized surface for flow control device |
| 06/27/2013 | WO2013093389A1 Unequal load collect and method of use |
| 06/27/2013 | WO2012168705A3 Valve control device |
| 06/27/2013 | WO2012166677A3 A method of conditioning a wall of a bore section |
| 06/27/2013 | US20130161098 Optimized pressure drilling with continuous tubing drill string |
| 06/27/2013 | US20130160989 Cleaning of water from drilling and hydraulic fracturing operations |
| 06/27/2013 | DE102004042956B4 Verfahren und Fülleinrichtung zum Auffüllen von Bohrzügen mit Bohrflüssigkeit Process and filling device for filling Bohrzügen with drilling fluid |
| 06/27/2013 | CA2856614A1 Unequal load collet and method of use |
| 06/27/2013 | CA2856576A1 Method for the removal or suppression of interfering metal ions using environmentally friendly competitive binders |
| 06/27/2013 | CA2855939A1 Functionalized surface for flow control device |
| 06/26/2013 | CN203022663U Barite mixing device for petroleum drilling |
| 06/26/2013 | CN203022662U Dust collection device for mine |
| 06/26/2013 | CN203022661U Multi-purpose machinery blocking-up type pulse spinning jet flowing spraying cleaning device |
| 06/26/2013 | CN203022643U Loss oil layer double-tube continuous sand removal tubular column |
| 06/26/2013 | CN203022625U Full-hydraulic rock drilling excavator produced by means of hydraulic excavator |
| 06/26/2013 | CN103180541A Managed pressure drilling apparatus |
| 06/26/2013 | CN103180540A Pumping mud by electrohydrodynamic propulsion |
| 06/26/2013 | CN103174389A Drilling construction blowout prevention and dust fall device |
| 06/26/2013 | CN103174132A Construction method of minor diameter pile inside city underground construction underground excavation pilot tunnel |
| 06/26/2013 | CN103174131A Underground engineering guiding-cavity-excavating small-diameter pile construction complete equipment system |
| 06/25/2013 | US8469119 Method and system for accessing subterranean deposits from the surface and tools therefor |
| 06/25/2013 | US8469116 Control system for mud cleaning apparatus |
| 06/25/2013 | US8469089 Process and apparatus to improve reliability of pinpoint stimulation operations |
| 06/25/2013 | CA2710564C Method and apparatus for facilitating continuous circulation of drilling mud during construction and maintenance of a well |
| 06/25/2013 | CA2705933C Wellbore fluid mixing system |
| 06/23/2013 | CA2798799A1 Lost circulation materials and methods of using same |
| 06/21/2013 | CA2807827A1 Modified cellulosic polymer for improved well bore fluids |
| 06/20/2013 | WO2013090692A1 Fluid safety valve |
| 06/20/2013 | WO2013090289A1 Completing a well in a reservoir |
| 06/20/2013 | WO2013090037A1 In-riser power generation |
| 06/20/2013 | WO2013089730A1 Dual closure system for well system |
| 06/20/2013 | WO2013014434A3 Particulate material delivery method and system |
| 06/20/2013 | WO2012110766A3 Enhanced system for sand cleaning in a hydrocyclone |
| 06/20/2013 | WO2012095340A3 Gravity based fluid trap |
| 06/20/2013 | WO2012066325A3 Method of and apparatus for drilling a subterranean borehole |
| 06/20/2013 | WO2012065970A3 Method for continuous formation core sampling |
| 06/20/2013 | WO2011114127A3 Solids heat exchanger |
| 06/20/2013 | US20130153296 Systems and Methods to Inhibit Packoff Formation During Drilling Assembly Removal from a Wellbore |
| 06/20/2013 | US20130153235 Systems and Methods To inhibit Packoff Events During Downhole Assembly Motion Within A Wellbore |
| 06/20/2013 | US20130153225 Compositions and Methods for Treatment of Well Bore Tar |
| 06/20/2013 | CA2857581A1 In-riser power generation |
| 06/19/2013 | EP2604786A2 Blow out preventer (bop) corroborator |
| 06/19/2013 | CN203008889U Analog device for obtaining drilling parameter in managed pressure drilling |
| 06/19/2013 | CN203008830U Nitrogen foam fluid continuous sand-washing tool |
| 06/19/2013 | CN203008829U Two-channel watering control valve |
| 06/19/2013 | CN203008828U Cyclone-vibration desanding device |
| 06/19/2013 | CN203008827U Compound type mud pit mud discharge pipe |
| 06/19/2013 | CN203008826U Dust collector for down-the-hole drill |
| 06/19/2013 | CN203002620U Novel drilling liquid double-layer vibrating screen |
| 06/19/2013 | CN103161449A Experimental device and measurement method for ice layer rotary drilling cutting heat and drilling parameters |
| 06/19/2013 | CN103161427A Multifunctional continuous circulating safety valve |
| 06/19/2013 | CN103161416A Guide dust-eliminating device for drill hole |
| 06/19/2013 | CN103161415A Negative pressure drilling system |
| 06/19/2013 | CN103160259A 255 DEG C superhigh temperature resistant water-based drilling fluid and construction process thereof |
| 06/19/2013 | CN102022091B Submersible water faucet |
| 06/19/2013 | CN101451424B Drilling tool with dust collector |
| 06/18/2013 | US8464784 Method and system for accessing subterranean deposits from the surface and tools therefor |
| 06/18/2013 | CA2757800C Mobile water treatment for an oil or gas well |
| 06/18/2013 | CA2731161C Selective fracturing tool |
| 06/18/2013 | CA2723586C Breaker fluids comprising a chelating agent and an enzyme |
| 06/18/2013 | CA2563447C Improvements in or relating to rock drilling equipment |
| 06/13/2013 | WO2013085515A2 Geological monitoring console |
| 06/13/2013 | WO2013000764A3 A fluid diverter system for a drilling facility. |
| 06/13/2013 | WO2012100259A3 Telemetry operated circulation sub |
| 06/13/2013 | WO2012085597A3 Valve assembly |
| 06/13/2013 | US20130146357 System and Method for Managed Pressure Drilling |
| 06/12/2013 | CN202991044U Electric rock drill side-type water supply system |
| 06/12/2013 | CN202990918U Automatic mud transferring device of mud solid control system |
| 06/12/2013 | CN202990917U Special vibrating screen for petroleum drilling fluid |
| 06/12/2013 | CN202990848U Drilling-rod-free geological drilling device |
| 06/12/2013 | CN103154421A Apparatus and system for processing solids in subsea drilling or excavation |
| 06/12/2013 | CN103154180A Drilling fluid and method for drilling in coal-containing formations |
| 06/12/2013 | CN103147721A Pulsed steam distributing valve |
| 06/12/2013 | CN103147708A Through type down hole hammer reverse circulation drilling dust collection device |
| 06/12/2013 | CN103147707A Complete treatment method for pile bottom sediment |
| 06/12/2013 | CN103147706A Pin-pulled broken-type automatic grouting valve floating valve |
| 06/12/2013 | CN103147705A Cast-in-place pile sludge treatment equipment with sludge making and long-distance deslagging functions |
| 06/12/2013 | CN103147704A Equipment for intercepting and diverting a liquid circulation flow |
| 06/12/2013 | CN103147703A Slag removing method for pile bottom |
| 06/12/2013 | CN102155195B Multi-control-unit multi-beam laser perforation device in oil well |
| 06/12/2013 | CA2761557A1 Systems and devices for removing materials from vacuum truck tanks |
| 06/11/2013 | CA2717638C Flowback tool |
| 06/07/2013 | CA2798546A1 System and method for pre-conditioning drill cuttings for treatment and disposal |
| 06/06/2013 | WO2013081986A1 Modular pumpouts and flowline architecture |
| 06/06/2013 | US20130140089 Method and system for controlling a compressor at a rock drilling apparatus and a rock drilling apparatus |
| 06/06/2013 | CA2856979A1 Apparatus and method for controlling a downhole device |
| 06/06/2013 | CA2856525A1 Modular pumpouts and flowline architecture |
| 06/05/2013 | EP2599951A2 Seabed well influx control system |
| 06/05/2013 | EP2598710A2 Control system for mud cleaning apparatus |
| 06/05/2013 | CN202970669U Sand-blocking-proof hierarchical fracturing tubular column |
| 06/05/2013 | CN202970632U Spinning well-flushing nozzle |
| 06/05/2013 | CN202970561U Oil well cleaning vehicle |
| 06/05/2013 | CN202970560U Unpowered stirrable foam generator |
| 06/05/2013 | CN202970559U Integral joint tubing directional valve |
| 06/05/2013 | CN202970558U Drilling mud outlet flow monitoring alarm |
| 06/05/2013 | CN202970557U Sedimentation-type sand-draining mud reclamation device |
| 06/05/2013 | CN202970556U Drilling cuttings collecting box |
| 06/05/2013 | CN202970555U Rotary mud gun rotor for solid control system |
| 06/05/2013 | CN202970554U Novel slurry channel for oil and gas well drilling |
| 06/05/2013 | CN202970553U Well washing pumping oil tubing string capable of decompressing and protecting oil layer |