| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 01/29/2014 | EP2516803B1 Bubble logging tool |
| 01/29/2014 | CN203412576U Two-dimensional visible tablet model experimental device |
| 01/29/2014 | CN203412575U Pulse generator applicable to high-sand-content mud |
| 01/29/2014 | CN203412574U Shock absorption and noise reduction structure for acoustic logging instrument |
| 01/29/2014 | CN203412573U Near-bit drilling pressure measuring sensor |
| 01/29/2014 | CN203412572U Drilling tester |
| 01/29/2014 | CN203412571U Pressure testing device of thrust module of vertical drilling tool |
| 01/29/2014 | CN203412570U Control device for automatic oil gauging of oil well tipping bucket |
| 01/29/2014 | CN203412569U Oil well type weighing metering device |
| 01/29/2014 | CN203412525U Resistivity-while-drilling drill collar |
| 01/29/2014 | CN103541729A Device for air pressure oil well tubular column leak hunting |
| 01/29/2014 | CN103541728A Well leakage speed measuring device used for well drilling |
| 01/29/2014 | CN103541727A Deepwater shallow layer fracture pressure computing technology |
| 01/29/2014 | CN103541726A 井深测量装置 Depth measurement device |
| 01/29/2014 | CN103541725A Method for obtaining holding rate of horizontal well through interfacial level |
| 01/29/2014 | CN103541724A Catcher used in well logging process |
| 01/29/2014 | CN103541723A Method for diagnosing working conditions of rod-pumped well in real time based on change of area of ground indicator diagram |
| 01/29/2014 | CN103541722A Testing device |
| 01/29/2014 | CN103541721A Test system for sand control screen pipes |
| 01/29/2014 | CN103541720A Technique for rapid evaluation of gas drilling wellbore stability |
| 01/29/2014 | CN103541719A System and method for umbilical-less positional feedback of a subsea wellhead member disposed in a subsea wellhead assembly |
| 01/29/2014 | CN103541718A Method for chart interpretation of water content of oil well |
| 01/29/2014 | CN103541717A Oil-gas-water three-phase multifunctional detection system |
| 01/29/2014 | CN103541716A Oil field oil flow measuring system with pre-processing function |
| 01/29/2014 | CN102256561B Method and system for transferring data from a device to a receiving unit |
| 01/29/2014 | CN101688439B Christmas tree with internally positioned flowmeter |
| 01/29/2014 | CN101397902B Method for monitoring oil, water well sleeve axial strain by using optical fibre Brillouin sensor |
| 01/28/2014 | US8636087 Rotating control system and method for providing a differential pressure |
| 01/28/2014 | US8636062 System and method for downhole communication |
| 01/28/2014 | US8636061 Tool for downhole formation evaluation |
| 01/28/2014 | US8636060 Monitoring downhole conditions with drill string distributed measurement system |
| 01/28/2014 | US8636054 Position indicating multiplexed control system and method for downhole well tools |
| 01/28/2014 | US8635907 Real-time completion monitoring with acoustic waves |
| 01/28/2014 | CA2762261C Process for determining mobile water saturation in a reservoir formation |
| 01/28/2014 | CA2714801C Directional setting tool and associated methods |
| 01/23/2014 | WO2014015323A1 Inground operations, system, communications and associated apparatus |
| 01/23/2014 | WO2014014783A1 Multi-beam optical displacement sensor |
| 01/23/2014 | WO2014014441A1 A system and method for correcting the speed of a downhole tool string |
| 01/23/2014 | WO2014014438A1 A system and method for wireline tool pump-down operations |
| 01/23/2014 | WO2014014356A1 Subsea leak-detection system |
| 01/23/2014 | WO2014013256A1 Downhole apparatus and method |
| 01/23/2014 | WO2014012349A1 Information transmission apparatus of well logging during drilling |
| 01/23/2014 | WO2013068709A3 Downhole structure sections |
| 01/23/2014 | WO2013055677A3 System for real-time monitoring and transmitting hydraulic fracture seismic events to surface using the pilot hole of the treatment well as the monitoring well |
| 01/23/2014 | US20140025303 Measuring transmissivity of wells from multiple logs |
| 01/23/2014 | US20140025302 Measuring oil and water transmissivity of wells from multiple logs |
| 01/23/2014 | US20140022537 Communication through an enclosure of a line |
| 01/23/2014 | US20140022375 Borehole inspection device and system with a self-cleaning system and method for loadng explosives in boreholes |
| 01/23/2014 | US20140022088 Advanced inground operations, system, communications and associated apparatus |
| 01/23/2014 | US20140020953 Advanced inground operations, system and associated apparatus |
| 01/23/2014 | CA2877080A1 Downhole apparatus and method |
| 01/22/2014 | EP2686713A2 Maximum depth of investigation of measurements in a formation |
| 01/22/2014 | EP2686712A2 System and method to compensate for arbitrary optical fiber lead-ins in an optical frequency domain reflectometry system |
| 01/22/2014 | EP2686639A1 Self centering bore measurement unit |
| 01/22/2014 | CN203403877U Wireless plane industrial displayer |
| 01/22/2014 | CN203403876U Sidetracked well three-layer water searching and clamping and production operation integrated tubular column |
| 01/22/2014 | CN203403875U Resistance-meeting display device of forty-arm caliper |
| 01/22/2014 | CN203403874U Isotope tracer injection device for oil field cross-well tracer technology |
| 01/22/2014 | CN203403870U Skid-mounted integrated process device of coalbed methane production well |
| 01/22/2014 | CN203402769U 滚筒式盘丝装置 Drum-type plate wire device |
| 01/22/2014 | CN203401463U Disassembling and assembling tool |
| 01/22/2014 | CN103528712A Method for monitoring temperature of coal mine shaft freezing wall in real time on basis of fiber bragg grating sensing |
| 01/22/2014 | CN103528613A Internet of Things dynamic monitoring and early warning method of major hazard source under coal mine |
| 01/22/2014 | CN103527185A Horizontal-well physical simulation experiment device and experimental method thereof |
| 01/22/2014 | CN103527180A System for collecting in-situ stress measurement data by using hydraulic fracturing |
| 01/22/2014 | CN103527179A Drill-hole high-pressure water pump-in test loading system |
| 01/22/2014 | CN103527178A Depth measuring device of hydraulic grab |
| 01/22/2014 | CN103527177A Downhole testing instrument |
| 01/22/2014 | CN103527176A Stereoscopic development three-dimensional experimental device of heavy oil reservoir |
| 01/22/2014 | CN103527175A Test system of sand control screen |
| 01/22/2014 | CN103527174A Test system of sand control screen |
| 01/22/2014 | CN103527173A Metering method and device for output liquid yield of producing well |
| 01/22/2014 | CN103527172A Method for calculating water saturation through variable rock electivity coupling index |
| 01/22/2014 | CN103527171A Down-hole pressure and weighing sensing system chip |
| 01/22/2014 | CN103527113A Oil-sucking rod rotating suspending device |
| 01/22/2014 | CN102108856B Small-angle well inclination state measuring method and device |
| 01/22/2014 | CN101765698B System and method for sensing pressure using an inductive element |
| 01/21/2014 | US8634274 Spindle for mud pulse telemetry applications |
| 01/21/2014 | US8634273 Acoustic telemetry system using passband equalization |
| 01/21/2014 | US8631867 Methods for cooling measuring devices in high temperature wells |
| 01/21/2014 | US8631866 Leak detection in circulated fluid systems for heating subsurface formations |
| 01/21/2014 | CA2762269C Method and apparatus for determining a level of a fluid in communication with a downhole pump |
| 01/21/2014 | CA2731932C Method and system of an electromagnetic telemetry repeater |
| 01/21/2014 | CA2722642C Drill pipe having an internally coated electrical pathway |
| 01/21/2014 | CA2698372C Adding positional information for surfaces in a geological formation after transforming to a gapped representation |
| 01/21/2014 | CA2681623C Determination of downhole pressure while pumping |
| 01/21/2014 | CA2587147C Electronic id tag and co-operating antenna |
| 01/16/2014 | WO2014011968A1 Pump noise reduction and cancellation |
| 01/16/2014 | WO2014011966A1 Device and method for predictive calibration |
| 01/16/2014 | WO2014011823A1 Communication between downhole tool and surface location |
| 01/16/2014 | WO2014011747A1 Landing indicator for logging tools |
| 01/16/2014 | WO2014011529A1 Improved flexibility of downhole fluid analyzer pump module |
| 01/16/2014 | WO2014011171A1 Systems and methods of drilling control |
| 01/16/2014 | WO2014011170A1 System and method to improve accuracy of galvanic tool measurements |
| 01/16/2014 | WO2013139830A3 Downhole detection system |
| 01/16/2014 | WO2012174051A3 Methods for analyzing downhole operations |
| 01/16/2014 | US20140014334 System and Method for Umbilical-Less Positional Feedback of a Subsea Wellhead Member Disposed in a Subsea Wellhead Assembly |
| 01/16/2014 | US20140014333 Method of Evaluation of Deposits and Opening of Productive Formations |
| 01/16/2014 | US20140014332 Methods Relating to Designing Wellbore Strengthening Fluids |
| 01/16/2014 | US20140014331 Method and tool for evaluating a geological formation |