| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 07/25/2012 | CN202348135U Electromagnetic wave pup joint |
| 07/25/2012 | CN102610606A Semiconductor device and its manufacturing method and optical proximity processing method |
| 07/25/2012 | CN102606149A Storage type geostress testing method and storage type geostress testing device by means of hole-wall strain method |
| 07/25/2012 | CN102606147A Formation testing while drilling instrument |
| 07/25/2012 | CN102606145A Underground coal mine anti-explosion mud-pulse wireless measurement while drilling system and using method thereof |
| 07/25/2012 | CN102606144A Front data acquisition system for mud logging unit |
| 07/25/2012 | CN102606143A Downward hole pressure measuring device and process |
| 07/25/2012 | CN102606142A Logging coupling detection system |
| 07/25/2012 | CN102606141A Method and device for detecting pile hole track, and driller provided with the device |
| 07/25/2012 | CN102606140A Series acoustic wave storage variable density logging unit |
| 07/25/2012 | CN102606139A Underwater wellhead system load test device and test method thereof |
| 07/25/2012 | CN102606138A Method for correcting dielectric constant of electromagnetic wave resistivity logger while drilling by means of phase-amplitude method |
| 07/25/2012 | CN102606137A Three-parameter headstall logger |
| 07/25/2012 | CN102606136A Logging-while-drilling value response law simulated experimental device |
| 07/25/2012 | CN102606135A Detecting system for mass and flow of return solid particles in oil drilling shaft and detecting method |
| 07/25/2012 | CN102606134A Device and method for measuring water draining content of drilling hole in mine top plate |
| 07/25/2012 | CN102606133A Production method for calibration block of radioactive fluid density logging instrument |
| 07/25/2012 | CN102606126A Non-planar network fracturing control method for fractured reservoir |
| 07/25/2012 | CN102606101A Novel downhole positioning device |
| 07/25/2012 | CN101806228B Coal bed gas radio spectrum direction-finding early warning system |
| 07/25/2012 | CN101571042B Continuous remote telemetering method for liquid levels of oil wells |
| 07/25/2012 | CN101482008B Use method of down-hole hole drilling quality check equipment |
| 07/25/2012 | CN101403298B Double-driving combination logging probe |
| 07/25/2012 | CN101215965B Well drilling method sinking ultrasonic measurement instrument |
| 07/25/2012 | CN101187307B Optical fiber multi-point temperature and pressure measuring method for intelligent well and the device therefor |
| 07/24/2012 | US8229670 Fluids lifting tool |
| 07/24/2012 | US8225869 Locator tool and methods of use |
| 07/24/2012 | US8225868 Apparatus and method for mounting acoustic sensors closer to a borehole wall |
| 07/24/2012 | US8225867 Systems and methods for distributed interferometric acoustic monitoring |
| 07/24/2012 | CA2548694C Fluid erosion protection washer for rotating shaft in mwd tool |
| 07/19/2012 | WO2012097295A2 Rotational test valve with tension reset |
| 07/19/2012 | WO2012097280A2 Rotational wellbore test valve |
| 07/19/2012 | WO2012096874A2 Fluidic density measurements based on beta particles detection |
| 07/19/2012 | WO2012096826A2 Flow profile modeling for wells |
| 07/19/2012 | WO2012096731A1 Sensor array configuration for swept-wavelength interferometric-based sensing systems |
| 07/19/2012 | WO2012095625A1 Boring ram |
| 07/19/2012 | WO2012065023A3 Method and apparatus for subsea wireless communication |
| 07/19/2012 | WO2012051196A3 Lift-gas optimization with choke control |
| 07/19/2012 | WO2012047437A3 Triaxial induction calibration without prior knowledge of the calibration area's ground conductivity |
| 07/19/2012 | WO2012040328A3 Radon migration of acoustic data |
| 07/19/2012 | WO2012030768A3 Dtem with short spacing for deep, ahead of the drill bit measurements |
| 07/19/2012 | WO2011079915A3 Wireless network discovery algorithm and system |
| 07/19/2012 | US20120181900 Sensors for measuring at least one of pressure and temperature, sensor arrays and related methods |
| 07/19/2012 | US20120181083 Top Drive Output Torque Measurement Method |
| 07/19/2012 | US20120181021 Rotational test valve with tension reset |
| 07/19/2012 | US20120181019 Nanohybrid phase interfaces for altering wettability in oil field applications |
| 07/19/2012 | US20120181018 Rotational wellbore test valve |
| 07/19/2012 | US20120181012 Downhole Tool Delivery System With Self Activating Perforation Gun |
| 07/19/2012 | DE112010001795T5 Messung der Phase von Empfangssignalen Measurement of the phase of received signals |
| 07/19/2012 | CA2823246A1 Sensor array configuration for swept-wavelength interferometric-based sensing systems |
| 07/19/2012 | CA2821181A1 Flow profile modeling for wells |
| 07/18/2012 | EP2475837A2 Drill bit with rate of penetration sensor |
| 07/18/2012 | CN202338338U 一种超声换能器 An ultrasonic transducer |
| 07/18/2012 | CN202338337U 随钻振动信号同步采集装置 Drilling vibration signal synchronization acquisition device |
| 07/18/2012 | CN202338336U Signal rubber plug for bumping type well completion technology |
| 07/18/2012 | CN202338335U 采气用柱塞井下运行状态跟踪系统 Underground Gas plunger running status tracking system |
| 07/18/2012 | CN202338334U 高压水井压降测试装置 High pressure wells drop test device |
| 07/18/2012 | CN202338333U 一种井下双通道电子压力计 A downhole dual-channel electronic pressure gauge |
| 07/18/2012 | CN202338332U 防冻压力表考克 Antifreeze gauge Hancock |
| 07/18/2012 | CN202338331U 在线式油井液面监测装置 Well-line level monitoring device |
| 07/18/2012 | CN202338330U 随钻测斜仪的数据采集器 Drilling inclinometer data logger |
| 07/18/2012 | CN202338329U 定位可调测试天滑轮装置 Positioning the adjustable test days pulley device |
| 07/18/2012 | CN202338328U 一种可控外径尺寸片式扶正器 A controlled diameter size piece centralizers |
| 07/18/2012 | CN202338327U 双喇叭孔计量孔板 Dual speaker holes metering orifice |
| 07/18/2012 | CN202338326U 一种油井翻斗计量装置 One kind of oil metering device dump |
| 07/18/2012 | CN202338325U 一种用于低渗透油田的井下电磁式流量计 A low permeability oilfield downhole electromagnetic flowmeter |
| 07/18/2012 | CN202338324U Capacitive isolation coupler for logging instrument |
| 07/18/2012 | CN202338308U 可上下往复移动对井下配水流量进行调节的装置 Can be equipped with a vertical reciprocating motion of the underground water flow regulation device |
| 07/18/2012 | CN202338276U 井下关井测试阀 Downhole shut-test valve |
| 07/18/2012 | CN102597421A Fracture monitoring |
| 07/18/2012 | CN102597420A Positioning tool |
| 07/18/2012 | CN102597419A Scanning tool |
| 07/18/2012 | CN102587899A Observation well liquid level test method of coal seam in-situ key parameters |
| 07/18/2012 | CN102587898A Method and device for detecting gas content of mixed fluid under while drilling condition |
| 07/18/2012 | CN102587897A Non-immersive underground optical fiber flow monitoring system |
| 07/18/2012 | CN102587896A Mechanical water exploration and water plugging channeling detection composite tubular column |
| 07/18/2012 | CN102587895A Methods and compositions for determination of fracture geometry in subterranean formations |
| 07/18/2012 | CN102587894A Horizontal well seepage experimental device |
| 07/18/2012 | CN102587893A Optic fiber temperature pressure sensor and probe thereof |
| 07/18/2012 | CN102587892A Method for simultaneously measuring distribution temperatures and fixed point pressures by single optical fiber |
| 07/18/2012 | CN102587891A Method and system for detecting space position between drilling well and a plurality of adjacent wells |
| 07/18/2012 | CN102587890A Automatic digital signal detection instrument for stroke frequency of petroleum sucking machine |
| 07/18/2012 | CN102587889A Experimental system for simulating solid-phase particles to plug coal (rock) cracks |
| 07/18/2012 | CN102587888A Method for determining migration velocity of displacement front in CO2 miscible displacement physical simulation |
| 07/18/2012 | CN102587887A Forecasting method for gas well condition |
| 07/18/2012 | CN102587886A Testing device and testing method for flow conductivity of acid-eroded fractures |
| 07/18/2012 | CN102587885A Device and method for metering crude oil output of wellhead |
| 07/18/2012 | CN102587874A Experimental device and experimental method for hydrothermal catalytic pyrolysis in heavy oil layer by means of ultrasonic wave |
| 07/18/2012 | CN102587869A Methods and devices for analyzing and controlling the propagation of waves in a borehole generated by water hammer |
| 07/18/2012 | CN101581207B Electric water distribution measurement and adjustment instrument of single-layer shunt detection |
| 07/18/2012 | CN101550825B Double- stroke flexible pumping unit annular gas test wellhead |
| 07/18/2012 | CN101519959B Drilling touching shocking integrative prospecting instrument and use method thereof |
| 07/18/2012 | CN101451432B High precision digital sonic wave variable density calibration method |
| 07/18/2012 | CN101289934B Outer tube oil gas water interface monitoring device |
| 07/18/2012 | CN101268359B Electro-chemical sensor |
| 07/17/2012 | US8220562 Proximity detection system for deep wells |
| 07/17/2012 | US8220543 Method and system for treating a subterranean formation using diversion |
| 07/17/2012 | US8220541 Intervention tool with operational parameter sensors |
| 07/17/2012 | US8220540 Apparatus and methods for estimating loads and movements of members downhole |
| 07/17/2012 | US8220538 Plug |