| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 06/05/2013 | CN202970693U Flow automatic measuring and adjusting system |
| 06/05/2013 | CN202970692U Separated layer water injection test pulley |
| 06/05/2013 | CN202970691U Device for hoisting draw shaft detector |
| 06/05/2013 | CN202970690U Oil well indicator diagram loss acquisition processing device |
| 06/05/2013 | CN202970689U Oil well indictor diagram acquisition device |
| 06/05/2013 | CN202970688U Generic detection device of logger |
| 06/05/2013 | CN202970687U Storage type well logging system |
| 06/05/2013 | CN202970686U Multiphase flow measuring system |
| 06/05/2013 | CN202970685U Oil field deep well detection control system |
| 06/05/2013 | CN202970684U Nuclear logging shakeproof gamma-ray energy spectrum detector |
| 06/05/2013 | CN202970683U Oil field logging skid |
| 06/05/2013 | CN202970682U Cable passing mechanism for packer |
| 06/05/2013 | CN202970681U Hydraulic balancing mechanism |
| 06/05/2013 | CN202970661U Annular multi-layer oil detection device used in oil-gas field development |
| 06/05/2013 | CN202970616U Pressure measuring ball valve used for one-time multilayer gravel pack tool |
| 06/05/2013 | CN202970515U Water detection pipe column used in oil-gas field development |
| 06/05/2013 | CN103132994A Under-well while-drilling hydrogen sulfide detection device |
| 06/05/2013 | CN103132992A Method and system for evaluating rock drillability anisotropy |
| 06/05/2013 | CN103132991A Position determining method and position determining device of Christmas tree of marine oil-and-gas field producing platform |
| 06/05/2013 | CN103132990A Dynamic prediction of downhole temperature distributions |
| 06/05/2013 | CN103132989A Method and system for calculating coal-bed gas well working fluid level |
| 06/05/2013 | CN103132988A Method and device of connection sealing of gyro inclinometer telemetry cylinder and headstall |
| 06/05/2013 | CN103132987A Probe thread guide structure of three-component induction coil array |
| 06/05/2013 | CN103132986A Method for measuring liquid production capacities of different reservoir stratums of coal-bed gas well |
| 06/05/2013 | CN103132968A Pressure control device of perforation fracturing test system |
| 06/05/2013 | CN102261240B Device and method for accurately monitoring drilling depth of rotary drill |
| 06/05/2013 | CN102230374B Underground program remote update device based on 485 bus |
| 06/05/2013 | CN102182441B Method for locating underground non-cable test system |
| 06/05/2013 | CN102155213B Dynamic detection method for mine mining-induced fracture |
| 06/05/2013 | CN102003171B Calibrating device of three-dimensional induction logger |
| 06/05/2013 | CN101936157B Method for detecting pore pressure of high pressure saltwater layer by using log information |
| 06/05/2013 | CN101871343B Rotation type multi-station tension and compression experiment device |
| 06/05/2013 | CN101793141B Mining hole depth and slope angle measuring device |
| 06/05/2013 | CN101787881B Shell of nitrogen pressure-transmission tube used for oilfield and welding method thereof |
| 06/05/2013 | CN101713650B Fiber bragg grating inclinometer and inclinometry algorithm |
| 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 | US8458627 Semiconductor device including logic circuit having areas of different optical proximity accuracy |
| 06/04/2013 | US8454330 Submersible pump |
| 06/04/2013 | US8454268 Gaseous sequestration methods and systems |
| 06/04/2013 | US8453764 System and method for monitoring and controlling underground drilling |
| 06/04/2013 | US8453760 Method and apparatus for controlling bottomhole temperature in deviated wells |
| 06/04/2013 | US8453744 Downhole modulator apparatus |
| 06/04/2013 | US8453732 Apparatus to sample heavy oil from a subterranean formation |
| 05/30/2013 | WO2013078000A1 Well data acquisition tool probe guard |
| 05/30/2013 | WO2013076621A1 Longitudinal absorber for downhole tool chassis |
| 05/30/2013 | WO2013076620A1 Surface communication system for communication with downhole wireless modem prior to deployment |
| 05/30/2013 | WO2013076499A2 Improvements in or relating to wireless data recovery |
| 05/30/2013 | WO2013076479A1 Distributed two dimensional fluid sensor |
| 05/30/2013 | WO2013052664A3 Production logging in horizontal wells |
| 05/30/2013 | WO2012080692A3 Well monitoring |
| 05/30/2013 | US20130138348 Method for determining the profile of an inflow and the parameters of a well-surrounding area in a multipay well |
| 05/30/2013 | US20130135114 Real time data compression and transmission |
| 05/30/2013 | US20130133948 Use of downhole pressure measurements while drilling to detect and mitigate influxes |
| 05/30/2013 | US20130133894 Marine isolation assembly |
| 05/30/2013 | US20130133883 Dual downhole pressure barrier with communication to verify |
| 05/30/2013 | US20130133882 Modular Downhole Tools and Methods |
| 05/30/2013 | US20130133881 System and method for controlling fluid pumps to achieve desired levels |
| 05/30/2013 | US20130133880 Method and system for passive electroseismic surveying |
| 05/30/2013 | CA2855349A1 Distributed two dimensional fluid sensor |
| 05/29/2013 | EP2597491A1 Surface communication system for communication with downhole wireless modem prior to deployment |
| 05/29/2013 | EP2597253A1 Dynamic prediction of downhole temperature distributions |
| 05/29/2013 | EP2597250A1 Longitudinal absorber for downhole tool chassis |
| 05/29/2013 | EP2596385A1 Real-time fracture detection and fracture orientation estimation |
| 05/29/2013 | EP2596210A2 Well |
| 05/29/2013 | EP2596209A2 Communication through an enclosure of a line |
| 05/29/2013 | CN202954809U Underground metrical information transmission system |
| 05/29/2013 | CN202954808U Automatic oil gauging device for oil well liquid level employing restoring method |
| 05/29/2013 | CN202954807U Protection device for horizontal well logging non-metallic umbrella production liquid profile tester |
| 05/29/2013 | CN202954806U Expanded-base drill detection and control device |
| 05/29/2013 | CN202954799U Bridge type concentric divided injection ground control system |
| 05/29/2013 | CN202954797U Electromechanical concentric separate injection measurement and adjustment control system |
| 05/29/2013 | CN202954791U Energy-saving control system of pumping unit for oil field |
| 05/29/2013 | CN202954790U Intelligent intermittent oil production device |
| 05/29/2013 | CN202954770U Self-sealing blowout preventing plug |
| 05/29/2013 | CN103124831A Inductive couplers for use in a downhole environment |
| 05/29/2013 | CN103123260A Rugged three-axis inclinometer |
| 05/29/2013 | CN103122761A Digital management system of direct-driven screw pump well |
| 05/29/2013 | CN102182446B Mine monitoring method and equipment |
| 05/29/2013 | CN102174883B Method for testing flow conductivity of clear water fracturing self-supported crack |
| 05/29/2013 | CN101059076B Method for evaluating cementing of underground pipe and force contact of borehole wall |
| 05/28/2013 | US8452551 Method and apparatus for monitoring multiphase fluid flow |
| 05/28/2013 | US8451136 Sonde attachment means |
| 05/28/2013 | US8448704 Method and system for monitoring the incursion of particulate material into a well casing within hydrocarbon bearing formations including gas hydrates |
| 05/28/2013 | CA2786724C Orientation sensing apparatus and a method for determining an orientation |
| 05/28/2013 | CA2642589C Method for formation permeability profile determination |
| 05/23/2013 | WO2013074593A1 Borehole imaging and formation evaluation while drilling |
| 05/23/2013 | WO2013074411A2 Enhanced resistivity measurement apparatus, methods, and systems |
| 05/23/2013 | WO2013074121A1 Systems and methodology for detecting a conductive structure |
| 05/23/2013 | WO2013074089A1 Directing a drilling operation using an optical computation element |
| 05/23/2013 | WO2013074070A1 Apparatus and method to produce data pulses in a drill string |
| 05/23/2013 | WO2013074056A1 Modeling tool passage through a well |
| 05/23/2013 | WO2013072844A1 Enhanced materials investigation |
| 05/23/2013 | WO2013072261A1 Pressure testing of subsea modules using heat |
| 05/23/2013 | WO2013028515A3 Wellbore leak detection systems and methods of using the same |
| 05/23/2013 | WO2013005091A3 Multiphase flowmeter |
| 05/23/2013 | WO2012177897A3 Estimating drill cutting origination depth using marking agents |
| 05/23/2013 | US20130126240 Method for salt and cross-bed proximity detection using deep directional electromagnetic measurements while drilling |
| 05/23/2013 | US20130126180 Monitoring hydrocarbon fluid flow |
| 05/23/2013 | US20130126158 Method of using controlled release tracers |
| 05/23/2013 | US20130126154 Safety valve with electrical actuator and tubing pressure balancing |