| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 09/07/2011 | CN102174886A LWD (Logging While Drilling) real-time detection device and method of horizontal directional drilling depth of coal bed gas |
| 09/07/2011 | CN102174885A Calibration method for high-precision spot-measurement gyro inclinometer for well drilling |
| 09/07/2011 | CN102174884A Directional gyro inclinometer spot measurement device |
| 09/07/2011 | CN102174883A Method for testing flow conductivity of self-supported crack in riverfrac treatment |
| 09/07/2011 | CN101886542B Oil string thread and sealing face damage acoustic detection method and detection device |
| 09/07/2011 | CN101676755B 激光定位装置 Laser positioning device |
| 09/07/2011 | CN101315029B Accurate synchronous method for receiving and transmitting well logging sound wave signal |
| 09/06/2011 | US8011451 Ranging methods for developing wellbores in subsurface formations |
| 09/06/2011 | US8011448 Rotary steerable tool |
| 09/06/2011 | US8011447 Automated drill string position survey |
| 09/06/2011 | US8011446 Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell |
| 09/06/2011 | US8011430 Method to measure injector inflow profiles |
| 09/06/2011 | CA2603451C A method of logging a well equipped with a rod pump |
| 09/01/2011 | WO2011106184A1 Hermetically sealed fiber sensing cable |
| 09/01/2011 | US20110209540 Method of testing a pipeline cut |
| 09/01/2011 | US20110209539 Methods, Systems, and Apparatus for Processing Drill Tools |
| 08/31/2011 | EP2362210A1 Fluid sensor and method of using same |
| 08/31/2011 | EP2362061A2 Oil and gas riser spider with low frequency antenna and corresponding method |
| 08/31/2011 | EP2361395A2 Apparatus and methods for gas volume retained coring |
| 08/31/2011 | EP2183465B1 Tool face sensor method |
| 08/31/2011 | CN201955640U 一种煤层气开采用压力计控制盒 One kind of CBM control box using a manometer |
| 08/31/2011 | CN201955058U 测深装置及具有该测深装置的工程机械 Sounding device and have construction machinery sounding device that |
| 08/31/2011 | CN201953412U 一种煤矿用温度检测装置 One kind of temperature detection device for use in mines |
| 08/31/2011 | CN201953378U 一种八扇区换能器 An eight sector transducer |
| 08/31/2011 | CN201953377U 用于煤层气井探测信号的信号传输设备 CBM wells used for signal transmission equipment to detect signal |
| 08/31/2011 | CN201953376U Tubing coupling detecting device |
| 08/31/2011 | CN201953375U 煤层瓦斯压力测量记录装置 Coal Seam Gas pressure measurement recording device |
| 08/31/2011 | CN201953374U 油田井下作业深度智能检测及控制系统 Downhole operation depth intelligent detection and control system |
| 08/31/2011 | CN201953373U 提高井下流量测调仪可靠对接的装置 Downhole flow measurement instrument to improve the tone and reliable docking device |
| 08/31/2011 | CN201953372U 承压式电阻率传感器 Pressure-type resistivity sensor |
| 08/31/2011 | CN201953371U 全自动记忆钻孔应力计 Automatic memory borehole stress meter |
| 08/31/2011 | CN201953370U 立柱电缆手持终端检测仪 Column handheld terminal cable tester |
| 08/31/2011 | CN201953359U Automatic exploitation system of natural gas hydrate |
| 08/31/2011 | CN102169337A Monitoring system of coal bed gas screw pump well |
| 08/31/2011 | CN102168553A High-speed measurement-while-drilling communication system |
| 08/31/2011 | CN102168552A Automatic air gun for measuring oil well liquid level |
| 08/31/2011 | CN102168551A Device and method for continuously measuring working fluid level depth of oil well and continuously metering produced liquid |
| 08/31/2011 | CN102168550A Borehole ground potential measuring electrode |
| 08/31/2011 | CN102168549A Device and method for measuring output liquid of coal bed methane well |
| 08/31/2011 | CN102168548A Exploitation measuring device and method of coal bed gas well |
| 08/30/2011 | US8009511 Pressure waves decoupling with two transducers |
| 08/30/2011 | US8009510 Two way check shot and reverse VSP while drilling |
| 08/30/2011 | US8009059 Downhole power generation and communications apparatus and method |
| 08/30/2011 | US8006766 Method and apparatus for controlling the speed of a pump in a well |
| 08/30/2011 | US8006755 Proppants coated by piezoelectric or magnetostrictive materials, or by mixtures or combinations thereof, to enable their tracking in a downhole environment |
| 08/30/2011 | US8006754 Proppants containing dispersed piezoelectric or magnetostrictive fillers or mixtures thereof, to enable proppant tracking and monitoring in a downhole environment |
| 08/30/2011 | CA2638566C Communications of downhole tools from different service providers |
| 08/30/2011 | CA2447245C Determination of dipole shear anisotropy of earth formations |
| 08/25/2011 | WO2011103564A2 Acoustic transducer with a backing containing unidirectional fibers and methods of making and using same |
| 08/25/2011 | WO2011103525A2 Systems and methods of a collar bore for a sample bottle assembly |
| 08/25/2011 | WO2011103056A1 Virtual flowmeter for a well |
| 08/25/2011 | WO2011103052A1 Acoustic downhole tool with rubber boot protected by expandable sleeve |
| 08/25/2011 | WO2011102840A1 Systems and methods of a sample bottle assembly |
| 08/25/2011 | WO2011102839A1 Systems and methods of a clamp for a sample bottle assembly |
| 08/25/2011 | WO2011101100A1 Fluid sensor and method of using same |
| 08/25/2011 | WO2011101099A1 Fluid sensor and method of using same |
| 08/25/2011 | WO2011081723A3 Pressure and flow control in drilling operations |
| 08/25/2011 | WO2011048373A3 Downhole monitoring with distributed acoustic/vibration, strain and/or density sensing |
| 08/25/2011 | WO2011019714A4 Methods and apparatus for determination of parameters related to a coiled tubing string |
| 08/25/2011 | US20110205847 Wireless telemetry systems for downhole tools |
| 08/25/2011 | US20110205080 Transmitter and receiver synchronization for wireless telemetry systems |
| 08/25/2011 | US20110204896 Detecting a structure in a well |
| 08/25/2011 | US20110204895 Tracking positions of personnel, vehicles, and inanimate objects |
| 08/25/2011 | US20110203846 Method and apparatus for seismic data acquisition during drilling operations |
| 08/25/2011 | US20110203845 System and method for optimizing drilling speed |
| 08/25/2011 | US20110203789 Pressure equalising devices |
| 08/25/2011 | DE102010008823A1 Verfahren und Vorrichtungen zur Vermessung der räumlichen Lage eines Bohrkopfs Methods and devices for measuring the spatial position of a drill head |
| 08/25/2011 | DE102007049606B4 Verfahren und Vorrichtung zum Einziehen eines aus Kurzrohren zusammengesetzten Rohrstranges in einen Bohrkanal Method and apparatus for feeding a composite of short tubes tubing into a drill hole |
| 08/24/2011 | EP2360497A2 Drill String Telemetry System and Method |
| 08/24/2011 | EP2358839A1 Improvement in enhanced oil recovery by polymer without supplementary equipment or product |
| 08/24/2011 | EP2156016B1 Control system |
| 08/24/2011 | EP1523607B1 Subterranean well pressure and temperature measurement |
| 08/24/2011 | CN201943692U 一种用于随钻测量仪器的主测壳体 A main test case for MWD instrument |
| 08/24/2011 | CN201943691U 油水井取压测压器 Oil wells Pressure Gauge |
| 08/24/2011 | CN201943690U 油井液面智能测试装置 Well level intelligent testing device |
| 08/24/2011 | CN201943689U 油井单井计量装置 Oil Well metering device |
| 08/24/2011 | CN201943688U 一种绝缘隔离体结构 An insulating spacer structure |
| 08/24/2011 | CN201943687U 一种自然伽马测井仪的防震结构 A natural gamma logging tool shock structure |
| 08/24/2011 | CN201943686U 油井故障实时预警系统 Well failures in real-time early warning system |
| 08/24/2011 | CN201943685U 一种连续光谱气测录井装置 A continuous spectrum of gas logging device |
| 08/24/2011 | CN201943654U 取压取样组合阀 Pressure sampling combination valve |
| 08/24/2011 | CN102162355A Geosteering method for landing horizontal well |
| 08/24/2011 | CN102162354A Petroleum logging vehicle and middle compartment ladder thereof |
| 08/23/2011 | US8002032 Hydraulic overshot with removable setting and testing core |
| 08/23/2011 | US8002031 Independent measuring and processing probe for preliminary studies on a well |
| 08/23/2011 | CA2622318C Communicating with a downhole tool |
| 08/23/2011 | CA2615183C Method and device for on-line acoustic monitoring of foam and aerated fluid properties |
| 08/23/2011 | CA2595107C Electromagnetic telemetry apparatus and methods for minimizing cyclical or synchronous noise |
| 08/23/2011 | CA2466389C Well communication system |
| 08/18/2011 | WO2011100509A2 Passive micro-vessel and sensor |
| 08/18/2011 | WO2011100437A2 X-ray fluorescence analyzer |
| 08/18/2011 | WO2011100435A2 Automated drilling fluid analyzer |
| 08/18/2011 | WO2011100315A1 Piezoelectric actuator for downhole applications |
| 08/18/2011 | WO2011099962A1 Subsea optical switch |
| 08/18/2011 | WO2011098767A2 System and method for determining position within a wellbore |
| 08/18/2011 | WO2011077201A3 System and method for torque stabilization of a drilling system |
| 08/18/2011 | WO2011071796A3 Method and apparatus to incorporated internal gradient and restricted diffusion in nmr inversion |
| 08/18/2011 | WO2011050061A3 Through drillstring logging systems and methods |
| 08/18/2011 | WO2011047261A3 Well collision avoidance using distributed acoustic sensing |
| 08/18/2011 | WO2011041248A3 Electromagnetic logging between a cased borehole and surface |