| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 04/18/2012 | EP2440735A2 Drill bit with weight and torque sensors |
| 04/18/2012 | EP2193255B1 Methods and systems for evaluating and treating previously-fractured subterranean formations |
| 04/18/2012 | CN202197312U 基于gprs网络的专网油井监控系统 Oil well monitoring system based on private network gprs network |
| 04/18/2012 | CN202197245U 一种电成像推靠器动力与传动系统 An electrical imaging push against the power and transmission unit |
| 04/18/2012 | CN202194656U 高温井钢丝自动润滑降温器 Automatic lubrication of high temperature wells wire cooling device |
| 04/18/2012 | CN202194655U 一种用于微电阻率扫描成像测井仪上的八臂探测器 An eight-arm probe micro-resistivity scanning imaging logging tool on |
| 04/18/2012 | CN202194654U 基于FlexRay总线的测井总线系统 Based on logging bus system FlexRay bus |
| 04/18/2012 | CN202194653U 多臂井径成像测井仪 Dobby caliper Imager |
| 04/18/2012 | CN202194652U 孔深测量装置及其所应用的旋挖钻机 Rotary hole depth measuring device and the application of drilling rig |
| 04/18/2012 | CN202194651U 两位置寻北仪转位机构 Two positions north finder indexing mechanism |
| 04/18/2012 | CN202194650U 一种带压力井温的声波变密度测井仪 An acoustic variable density with pressure well temperature logging tool |
| 04/18/2012 | CN202194649U 一种油井自动计量装置 One kind of oil automatic metering device |
| 04/18/2012 | CN202194648U 板簧组件 Leaf spring assembly |
| 04/18/2012 | CN202194647U 全井眼流量测井仪机械短节 Full borehole logging tool flow mechanical short section |
| 04/18/2012 | CN202194646U 耐高温井下流量计 High temperature downhole flowmeter |
| 04/18/2012 | CN202194645U 一种井下超声波多普勒流量测量装置 A downhole ultrasonic Doppler flow measurement devices |
| 04/18/2012 | CN1944953B Method and apparatus for determining position in a pipe |
| 04/18/2012 | CN102418517A 煤矿用全液压钻机钻孔深度行程综合检测方法 Mine hydraulic rigs drilling depth comprehensive detection methods trip |
| 04/18/2012 | CN102418516A 随钻近钻头定向参数测量装置 Near drill directional drilling parameter measurement device |
| 04/18/2012 | CN102418515A 一种采用垂准仪进行竖井定向测量的方法 One kind of vertical collimator performed using measurement methods Shaft Orientation |
| 04/18/2012 | CN102418514A 管状钢环自锁器 Tubular steel ring self-locking device |
| 04/18/2012 | CN102418513A 公路采空区处治效果检测方法 Highway goaf Treatment effect detection method |
| 04/18/2012 | CN102418512A Flexible insulation short section |
| 04/18/2012 | CN102418511A 低渗透储层井下关井水井压降试井分析方法 Low permeability reservoir of underground water wells shut-drop method of Well Test Analysis |
| 04/18/2012 | CN101462878B 声波测井系统多极子接收用压电陶瓷材料及其制备方法 Multipole sonic logging system receiving piezoelectric ceramic material and preparation method |
| 04/18/2012 | CN101349151B 一种电磁波测井仪的三级刻度装置 An electromagnetic wave logging tool three scale devices |
| 04/18/2012 | CN101338665B 一种高频电磁波发射机 A high-frequency electromagnetic wave transmitter |
| 04/18/2012 | CN101338658B 可进行钢丝作业的密闭电潜泵生产完井系统及操作方法 Steel operations can be sealed ESP completion systems of production and method of operation |
| 04/18/2012 | CN101251007B 一种插装式电液集成装置 An integrated electro-hydraulic device mounted plug |
| 04/17/2012 | US8159365 Distributed databases for a well control drilling system |
| 04/17/2012 | US8159226 Systems, methods and apparatuses for monitoring and recovery of petroleum from earth formations |
| 04/17/2012 | US8157023 Boring tool tracking fundamentally based on drill string length, pitch and roll |
| 04/17/2012 | US8157011 System and method for performing a fracture operation on a subterranean formation |
| 04/17/2012 | US8157008 Cement evaluation method and tool |
| 04/17/2012 | US8157002 Slip ring apparatus for a rotary steerable tool |
| 04/17/2012 | US8156801 Flow metering device |
| 04/17/2012 | US8156799 Rotating fluid flow measurement device and method |
| 04/12/2012 | WO2012048192A2 Ultrasonic telemetry and power transmission through subsea riser casing wall |
| 04/12/2012 | WO2012047995A2 Torsionally vibrating viscosity and density sensor for downhole applications |
| 04/12/2012 | WO2012047983A2 A method and apparatus for estimating viscosity and density downhole using a relaxed vibrating electrically conductive element |
| 04/12/2012 | WO2012047861A2 Wear-out detection methods for printed circuit board assembly components used in downhole oilfield environments |
| 04/12/2012 | WO2012047693A2 Formation sensing and evaluation drill |
| 04/12/2012 | WO2012047437A2 Triaxial induction calibration without prior knowledge of the calibration area's ground conductivity |
| 04/12/2012 | WO2012047436A1 Active standoff compensation in measurements with oil-based mud resistivity imaging devices |
| 04/12/2012 | WO2012047431A2 Orientable eccentric downhole assembly |
| 04/12/2012 | WO2012045937A2 Simulation of a geological phenomenon |
| 04/12/2012 | WO2012045936A2 Karstification simulation |
| 04/12/2012 | WO2012045122A2 Device and method for data communication through metal |
| 04/12/2012 | WO2011159502A3 Compartmentalized fiber optic distributed sensor |
| 04/12/2012 | WO2011148288A3 System and method for straightening tubing |
| 04/12/2012 | US20120089335 Fluid pressure-viscosity analyzer for downhole fluid sampling pressure drop rate setting |
| 04/12/2012 | US20120089334 System and method for measuring depth and velocity of instrumentation within a wellbore using a bendable tool |
| 04/12/2012 | US20120085583 Drill bit assembly having electrically isolated gap joint for electromagnetic telemetry |
| 04/12/2012 | US20120085582 Establishing positions of locating field detectors and path mapping in underground boring tool applications |
| 04/12/2012 | US20120085538 Method and apparatus for deploying and using self-locating title of the invention downhole devices |
| 04/12/2012 | US20120085161 Torsionally vibrating viscosity and density sensor for downhole applications |
| 04/12/2012 | CA2813638A1 Formation sensing and evaluation drill |
| 04/12/2012 | CA2813039A1 Device and method for data communication through metal |
| 04/11/2012 | EP2438475A2 Borehole compensated resistivity logging tool having an asymmetric antenna spacing |
| 04/11/2012 | EP2438269A2 Wireless transmission system and system for monitoring a drilling rig operation |
| 04/11/2012 | EP2438268A2 System and method for estimating velocity of a downhole component |
| 04/11/2012 | EP1257728B1 Artificial lift apparatus with automated monitoring of fluid height in the borehole |
| 04/11/2012 | CN202190267U 用于测井系统的远程故障诊断系统和远程监控系统 Remote fault diagnosis system for logging system and remote monitoring systems |
| 04/11/2012 | CN202187759U 一种井下漏失报警系统 A downhole leakage alarm system |
| 04/11/2012 | CN202187758U 一种旋挖钻机用测斜仪 One kind of rotary drilling rig with inclinometer |
| 04/11/2012 | CN202187757U 抽油机示功图测试辅助卸载装置 Pumping dynamometer test aid unloading device |
| 04/11/2012 | CN202187755U 一种注气辅助电加热油页岩原位开采模拟装置及系统 An injection of gas auxiliary heating oil shale in-situ mining analog devices and systems |
| 04/11/2012 | CN102410015A Electric analog system and method for infiltration law of wells in complex structures |
| 04/11/2012 | CN102410014A 含水围岩煤层瓦斯压力测试方法 Coal Seam Gas wall rock containing water pressure test method |
| 04/11/2012 | CN102410013A 一种有线钻杆钻进过程中监测孔深的方法 A process of monitoring the depth of the hole drilling method of wired drill pipe |
| 04/11/2012 | CN102410012A 无线随钻测斜仪测斜短节组合减震方法及组合减震装置 MWD inclinometer inclinometer short section combination shock absorber damping methods and compositions |
| 04/11/2012 | CN102410011A 一种钻杆接头性能的评价方法 A performance evaluation method of drill pipe joints |
| 04/11/2012 | CN102409967A 一种改进的液压冲击钻 An improved hydraulic percussion drill |
| 04/10/2012 | US8154420 System and method for downhole telemetry |
| 04/10/2012 | US8151905 Downhole telemetry system and method |
| 04/10/2012 | US8151904 Method for improved well control with a downhole device |
| 04/10/2012 | US8151658 Ding inspection device |
| 04/05/2012 | WO2012042397A2 Methods for reservoir evaluation employing non-equilibrium compositional gradients |
| 04/05/2012 | WO2012042353A2 Imaging methods and systems for downhole fluid analysis |
| 04/05/2012 | WO2012003115A3 System, apparatus, and method for monitoring a subsea flow device |
| 04/05/2012 | WO2011163602A3 Systems and methods for collecting one or more measurements in a borehole |
| 04/05/2012 | WO2011162939A3 Sensors in swellable materials |
| 04/05/2012 | WO2011156132A3 Method of determining the dip of a formation |
| 04/05/2012 | WO2011149742A3 Method for salt and cross-bed proximity detection using deep directional electromagnetic measurements while drilling |
| 04/05/2012 | WO2011146866A3 Method and apparatus for deploying and using self-locating downhole devices |
| 04/05/2012 | WO2011146734A3 Pulse neutron formation gas identification with lwd measurements |
| 04/05/2012 | WO2011129990A3 Three-coil system with short nonconductive inserts for transient mwd resistivity measurements |
| 04/05/2012 | WO2011127156A3 Method and apparatus for evaluating a cemented borehole casing |
| 04/05/2012 | US20120084021 Monitoring Flow of Single or Multiple Phase Fluids |
| 04/05/2012 | US20120080229 Formation Sensing and Evaluation Drill |
| 04/05/2012 | US20120080228 Status indicators for use in earth-boring tools having expandable members and methods of making and using such status indicators and earth-boring tools |
| 04/05/2012 | US20120080227 Wireless transmission system and system for monitoring a drilling rig operation |
| 04/05/2012 | US20120080184 Apparatus and method for evaluating a wellbore, in particular a casing thereof |
| 04/05/2012 | US20120080183 Remotely controlled apparatus for downhole applications, components for such apparatus, remote status indication devices for such apparatus, and related methods |
| 04/05/2012 | CA2799273A1 Downhole orientation sensing with nuclear spin gyroscope |
| 04/04/2012 | EP2436875A2 Downhole gas breakout sensor |
| 04/04/2012 | EP2435862A2 Apparatus and method for removing anisotropy effect from directional resistivity measurements |
| 04/04/2012 | EP2435659A2 Membrane for oil compensation |
| 04/04/2012 | EP2435658A1 System and method for determining the most favorable locations for enhanced geothermal system applications |
| 04/04/2012 | EP2435655A2 Method and system for transferring signals through a drill pipe system |