| Patents for E21B 43 - Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells (64,186) |
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| 06/05/2013 | CN202970652U Seam punching type sintering filter net sieve pipe |
| 06/05/2013 | CN202970651U Rotary locating tool |
| 06/05/2013 | CN202970650U Novel oil extraction device without oil pipe |
| 06/05/2013 | CN202970649U Numerical-control oil extracting device for wells with damaged casings |
| 06/05/2013 | CN202970648U Oil pumping unit |
| 06/05/2013 | CN202970647U Pressure balance coaxial small wheel steering large wheel type oil pumping machine |
| 06/05/2013 | CN202970646U Pressure balance rocker steering large wheel type oil pumping machine |
| 06/05/2013 | CN202970645U Full visualization directional well gas-liquid flow state wellhole simulation experiment device |
| 06/05/2013 | CN202970644U Intelligent control walking-beam-free type oil engine |
| 06/05/2013 | CN202970643U Tower-type oil pumping machine |
| 06/05/2013 | CN202970642U Non-impact tower-type pumping unit |
| 06/05/2013 | CN202970641U Tower-type oil pumping machine |
| 06/05/2013 | CN202970640U Reservoir protection tubular pillar of pressure self-adaptive anchoring packer |
| 06/05/2013 | CN202970639U Upturning move-over device for tower pumping unit |
| 06/05/2013 | CN202970638U Chain type oil sucking machine |
| 06/05/2013 | CN202970637U Injection and drainage device used for discontinuous opening well |
| 06/05/2013 | CN202970636U Hoist type beam-pumping unit capable of balancing automatically |
| 06/05/2013 | CN202970635U Automatic gear-rack balance-adjusting beam pumping unit |
| 06/05/2013 | CN202970634U Beam-free pumping unit with single transmission wheel rolling to step aside |
| 06/05/2013 | CN202970633U Full-automatic hydraulic pumping unit |
| 06/05/2013 | CN202970622U Double-flow-passage check valve |
| 06/05/2013 | CN202970617U Simple reducing valve of thermal recovery operation |
| 06/05/2013 | CN202970616U Pressure measuring ball valve used for one-time multilayer gravel pack tool |
| 06/05/2013 | CN202970594U Wellhead device special for oil field fracturing |
| 06/05/2013 | CN202970575U Blockage removing device adopting high-pressure jetting and negative-pressure pumping |
| 06/05/2013 | CN103140649A Method for treating a productive formation and borehole equipment for the implementation of same |
| 06/05/2013 | CN103140648A Drill pipe |
| 06/05/2013 | CN103140563A Delivery of particulate material below ground |
| 06/05/2013 | CN103133434A Energy storage type energy-saving hydraulic pumping unit |
| 06/05/2013 | CN103133340A Gas well automatic liquid drainage plunger |
| 06/05/2013 | CN103133339A Two-stage compression oil well pump and oil pump process thereof |
| 06/05/2013 | CN103133337A Novel airproof oil well pump and oil pumping technology thereof |
| 06/05/2013 | CN103133335A Middle exhausting gas prevention oil-well pump and oil pumping technology thereof |
| 06/05/2013 | CN103133028A Underground coal seam hydrofracture crack oriented developing method |
| 06/05/2013 | CN103132971A Test simulating device for improving recovery rate of coal bed methane by injecting carbon dioxide |
| 06/05/2013 | CN103132970A Staged fracturing oil tube system and application method thereof |
| 06/05/2013 | CN103132969A Staged fracturing sliding sleeve used for oil well and device and usage method thereof |
| 06/05/2013 | CN103132968A Pressure control device of perforation fracturing test system |
| 06/05/2013 | CN103132967A Multilateral well fracturing hanging well completion process device |
| 06/05/2013 | CN103132966A Single main pipe single well water distribution process applied to oil exploitation field |
| 06/05/2013 | CN103132965A Single main pipe single well water distribution system applied to oil exploitation field and water distribution process thereof |
| 06/05/2013 | CN103132964A Single dry pipe multi-well water distribution system and water distribution process thereof |
| 06/05/2013 | CN103132963A Single main pipe single well water distribution system applied to oil exploitation field |
| 06/05/2013 | CN103132962A Single dry pipe multi-well water distribution system |
| 06/05/2013 | CN103132961A Water distribution technology based on single-dry-pipe multi-well water distribution system |
| 06/05/2013 | CN103132960A Oil field water injection system applied to oil field |
| 06/05/2013 | CN103132959A Oil field water injection system applied to oil field and water injection method thereof |
| 06/05/2013 | CN103132958A Oil field water injection method applied to oil field |
| 06/05/2013 | CN103132957A Flow control filter capable of choosing distance between inlets and outlets of flow control element installation ducts in well |
| 06/05/2013 | CN103132956A Seabed well influx control system |
| 06/05/2013 | CN103132955A Pulley-type eccentric rack reversing pumping unit |
| 06/05/2013 | CN103132954A Full hydraulic changing stroke energy-saving type oil pumping unit |
| 06/05/2013 | CN103132953A Light-emitting diode (LED) device stimulating travel of sucker rod |
| 06/05/2013 | CN103132952A Gas mining machine |
| 06/05/2013 | CN103132945A Water injection control valve |
| 06/05/2013 | CN103127849A Device for accelerating dissolving of polymeric compound swelling particles |
| 06/05/2013 | CN103127848A Polymer swelling particle dissolving accelerating device with instant ring and water leaking structure |
| 06/05/2013 | CN102226412B Underground dark mining drilling well gas extraction method |
| 06/05/2013 | CN102220119B Oil displacing method for reservoirs with high temperature and salinity |
| 06/05/2013 | CN102094611B Coal mine under-well fracturing complete equipment |
| 06/05/2013 | CN101892821B Eccentric balance lifting device |
| 06/05/2013 | CN101798915B Method for improving recovery ratio of thick-layer massive thickened oil by utilizing subsection fireflooding exploitation |
| 06/05/2013 | CN101581208B Water injector for automatically balancing downhole flow of oilfield |
| 06/05/2013 | CN101531893B Functional resin tectorial membrane proppant and preparation method thereof |
| 06/05/2013 | CN101490363B Perforating methods and devices for high wellbore pressure applications |
| 06/05/2013 | CN101469609B Oil pumping well liquid level measuring systems, measuring method and oil pumping well oil extraction technique integrated control system |
| 06/04/2013 | US8455403 Thermoset nanocomposite particles, processing for their production, and their use in oil and natural gas drilling applications |
| 06/04/2013 | US8455402 Wellbore operations using controlled variable density fluid |
| 06/04/2013 | US8454268 Gaseous sequestration methods and systems |
| 06/04/2013 | US8453747 Method for liquid control in multiphase fluid pipelines |
| 06/04/2013 | US8453743 Methods of fracturing an openhole well using venturi section |
| 06/04/2013 | US8453742 Method and apparatus for selective acid diversion in matrix acidizing operations |
| 06/04/2013 | US8453741 Tethered polymers used to enhance the stability of microemulsion fluids |
| 06/04/2013 | US8453739 Triaxial linear induction antenna array for increased heavy oil recovery |
| 06/04/2013 | US8453734 Shunt isolation valve |
| 06/04/2013 | US8453733 Method to control driving fluid breakthrough during production of hydrocarbons from a subterranean reservoir |
| 06/04/2013 | US8453726 Corrugated settling cup and a multi-cup uniform flux gas anchor |
| 06/04/2013 | CA2707063C Uncollapsed expandable wellbore junction |
| 06/04/2013 | CA2707061C Uncollapsed expandable wellbore junction |
| 06/02/2013 | CA2797959A1 Oil well pump apparatus |
| 05/30/2013 | WO2013077947A1 Releasing activators during wellbore operations |
| 05/30/2013 | WO2013075235A1 Inflow control solutions for wellbores |
| 05/30/2013 | WO2013075208A1 Oil recovery process using crossed horizontal wells |
| 05/30/2013 | WO2013075207A1 Staggered horizontal well oil recovery process |
| 05/30/2013 | WO2013075206A1 Horizontal well line-drive oil recovery process |
| 05/30/2013 | US20130138254 Automated controls for pump down operations |
| 05/30/2013 | US20130133901 Apparatus for Expanding Tubulars in a Wellbore |
| 05/30/2013 | US20130133896 Fluid injection device |
| 05/30/2013 | US20130133894 Marine isolation assembly |
| 05/30/2013 | US20130133892 BREAKING DIUTAN WITH OXALIC ACID AT 180F to 220F |
| 05/30/2013 | US20130133891 Equalization Valve |
| 05/30/2013 | US20130133890 Alkaline persulfate for low-temperature breaking of multi-chain polymer viscosified fluid |
| 05/30/2013 | US20130133887 Methods for Initiating New Fractures in a Completed Wellbore Having Existing Fractures Present Therein |
| 05/30/2013 | US20130133886 Time-delay Fluids for Wellbore Cleanup |
| 05/30/2013 | US20130133884 Horizontal well line-drive oil recovery process |
| 05/30/2013 | US20130133876 Seat assembly for isolating fracture zones in a well |
| 05/30/2013 | CA2856474A1 Inflow control solutions for wellbores |
| 05/30/2013 | CA2853441A1 Releasing activators during wellbore operations |
| 05/29/2013 | EP2597252A2 Compact surface well testing system and method |
| 05/29/2013 | EP2597251A1 Entry tube system |