| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 05/24/2012 | WO2012065934A1 Navigation system |
| 05/24/2012 | WO2012065258A1 Process for determining mobile water saturation in a reservoir formation |
| 05/24/2012 | WO2012065257A1 Method and apparatus for determining a level of a fluid in communication with a downhole pump |
| 05/24/2012 | WO2012036927A3 Downhole sensor assembly and method of using same |
| 05/24/2012 | US20120130642 Downhole Tool Damage Detection System and Method |
| 05/24/2012 | US20120127829 Generating fluid telemetry |
| 05/24/2012 | US20120126817 Downhole surveying utilizing multiple measurements |
| 05/24/2012 | US20120126816 Method of monitoring a hydrocarbon reservoir |
| 05/24/2012 | US20120126151 Methods and apparatus for determination of parameters related to a coiled tubing string |
| 05/24/2012 | US20120125686 Method And System For Transferring Signals Through A Drill Pipe System |
| 05/24/2012 | US20120125602 Monitoring Injected Nonhydrocarbon And Nonaqueous Fluids Through Downhole Fluid Analysis |
| 05/24/2012 | US20120125596 Ruggedized fiber optic cable and method of optical fiber transmission |
| 05/24/2012 | US20120125077 Downhole instrument calibration during formation survey |
| 05/24/2012 | DE102008026456B4 Bohrkopf Wellhead |
| 05/24/2012 | CA2817862A1 Navigation system |
| 05/24/2012 | CA2817861A1 Optical element |
| 05/24/2012 | CA2816115A1 High temperature downhole gauge system |
| 05/24/2012 | CA2813729A1 Apparatus and method for drilling a well |
| 05/23/2012 | EP2455581A2 Methods and compositions for determination of fracture geometry in subterranean formations |
| 05/23/2012 | CN202228071U Stratum perforation testing device |
| 05/23/2012 | CN202228069U Pressure bearing and leakage blocking tester |
| 05/23/2012 | CN202228068U Pressure test device for thermal insulation pipe in heavy oil thermal production well |
| 05/23/2012 | CN202228067U Liquid level monitoring device |
| 05/23/2012 | CN202228066U Wellhead connector |
| 05/23/2012 | CN202228065U Depth measurement device for rotary excavation drill machine |
| 05/23/2012 | CN202228064U Vibration-prevention device for hole site depth measuring sensor of rotary drill |
| 05/23/2012 | CN202228063U Sealed joint of well logging instrument |
| 05/23/2012 | CN202228062U Double ear screw rod-type anti-falling device |
| 05/23/2012 | CN202228061U Radial connection structure |
| 05/23/2012 | CN202228007U Portable polished rod eye for measuring indicator diagram |
| 05/23/2012 | CN102466480A 一种摄像测斜仪 An imaging inclinometer |
| 05/23/2012 | CN102465697A 复合运动破岩试验测试硬件系统 Rock breaking sports complex hardware system test test |
| 05/23/2012 | CN102465696A 一种石油钻头齿圈复合运动状态下的破岩性能测试方法 Rock breaking performance test method for oil drill ring complex motion state |
| 05/23/2012 | CN102465695A 一种煤层气井的监控方法和装置 Monitoring method and apparatus for coalbed methane wells |
| 05/23/2012 | CN102465691A 油页岩就地干馏开采方法及其模拟实验系统 Situ retorting of oil shale mining methods and simulation systems |
| 05/23/2012 | CN102174888B Method for processing formation data based on lithologic parameter of reservoir rock |
| 05/23/2012 | CN101936929B X-ray fluorescent element analysis device and mud logging unit thereof |
| 05/23/2012 | CN101435329B Error rate test system based on Bayes theorem |
| 05/23/2012 | CN101413389B Graduation apparatus of magnetic nuclear resonance logger |
| 05/23/2012 | CN101403294B Stratum pressure detection method for interchange of PDC drilling bit and roller bit |
| 05/23/2012 | CN101403291B Preset production fluid section plane test method of mechanical mining horizontal well and special shaft mouth test apparatus |
| 05/23/2012 | CN101245700B Borehole clinometer probe |
| 05/23/2012 | CN101191414B Down hole forward vision sound wave dynamic digital deflection focalizing imaging method |
| 05/23/2012 | CN101182768B Ultra-thick oil down-hole temperature, pressure double parameter (multi-point) dynamic measurement system |
| 05/23/2012 | CN101012745B Method for measurement of oil gas well bore track |
| 05/22/2012 | US8184014 Driver to transmit signals over a transmission line in a well |
| 05/18/2012 | WO2012065126A2 Remote operation of setting tools for liner hangers |
| 05/18/2012 | WO2012065123A2 Remote operation of cementing head |
| 05/18/2012 | WO2012065118A2 System and method for remote sensing |
| 05/18/2012 | WO2012065023A2 Method and apparatus for subsea wireless communication |
| 05/18/2012 | WO2012064961A1 System and method of constant depth of cut control of drilling tools |
| 05/18/2012 | WO2012064953A1 System and method of constant depth of cut control of drilling tools |
| 05/18/2012 | WO2012064948A2 System and method of configuring drilling tools utilizing a critical depth of cut control curve |
| 05/18/2012 | WO2012064944A2 Drilling control system and method |
| 05/18/2012 | WO2012064855A2 Underground drilling apparatus |
| 05/18/2012 | WO2012064728A2 Sensor on a drilling apparatus |
| 05/18/2012 | WO2012064610A2 System and method for communicating data between wellbore instruments and surface devices |
| 05/18/2012 | WO2012064406A2 Method and system for pulse neutron capture sigma inversion |
| 05/18/2012 | WO2012014126A3 Frequency sweeping tubewave sources for liquid filled boreholes |
| 05/18/2012 | WO2011159509A3 Method for determining spatial distribution of fluid injected into subsurface rock formations |
| 05/18/2012 | WO2011100435A9 Automated drilling fluid analyzer |
| 05/18/2012 | CA2817696A1 System and method of constant depth of cut control of drilling tools |
| 05/18/2012 | CA2817695A1 System and method of constant depth of cut control of drilling tools |
| 05/18/2012 | CA2817693A1 System and method of configuring drilling tools utilizing a critical depth of cut control curve |
| 05/18/2012 | CA2817593A1 System and method for remote sensing |
| 05/18/2012 | CA2817076A1 Sensor on a drilling apparatus |
| 05/18/2012 | CA2816270A1 Method and system for pulse neutron capture sigma inversion |
| 05/18/2012 | CA2814862A1 Drilling control system and method |
| 05/18/2012 | CA2762261A1 Process for determining mobile water saturation in a reservoir formation |
| 05/17/2012 | US20120120985 Temperature sensor using an optical fiber |
| 05/17/2012 | US20120119076 Method and Apparatus for Detecting while Drilling Underbalanced The Presence and Depth of Water Produced from The Formation and for Measuring Parameters Related Thereto |
| 05/17/2012 | US20120118578 Purging of Fiber Optic Conduits in Subterranean Wells |
| 05/17/2012 | US20120118564 Erosion Tracer And Monitoring System And Methodology |
| 05/17/2012 | US20120118558 Downhole sensing system using carbon nanotube fet |
| 05/17/2012 | CA2762269A1 Method and apparatus for determining a level of a fluid in communication with a downhole pump |
| 05/16/2012 | EP2453107A1 Navigation system |
| 05/16/2012 | EP2452044A2 Downhole apparatus, device, assembly and method |
| 05/16/2012 | EP2452043A1 Identifying types of sensors based on sensor measurement data |
| 05/16/2012 | CN202221618U Vertical-well steam-injection well pattern data acquisition device |
| 05/16/2012 | CN202221482U Logging system |
| 05/16/2012 | CN202220600U Automatic drilling depth displaying and recording system of full-hydraulic power head drilling machine |
| 05/16/2012 | CN202220599U Novel lathe dog |
| 05/16/2012 | CN202220598U Three-dimensional electric analog experiment device of horizontal well exploitation |
| 05/16/2012 | CN202220597U Measurement pipe nipple for drilling pressure and torque while drilling |
| 05/16/2012 | CN202220596U Induction metal coil system |
| 05/16/2012 | CN202220595U Petroleum logging truck and middle cabin ladder thereof |
| 05/16/2012 | CN102460219A 具有非对称天线间距的钻井补偿的电阻率测井工具 Resistivity logging tool has a drilling compensate asymmetric antenna spacing of |
| 05/16/2012 | CN102459810A 多级机械通井工具 Multi-level mechanical ventilation shaft tool |
| 05/16/2012 | CN102459807A 用于监测流体的方法和装置 Method and apparatus for monitoring fluid |
| 05/16/2012 | CN102454401A Method for obtaining logging saturation of low porosity permeability reservoir |
| 05/16/2012 | CN102454398A Gas layer and water layer recognition method for low-porosity and low-permeability reservoir |
| 05/16/2012 | CN102454393A Method and device for adjusting flow of underground distributed water in up and down reciprocating motion manner |
| 05/16/2012 | CN102454372A Shaft pressure management system and method |
| 05/16/2012 | CN102454367A Power and signal transmission drill stem |
| 05/15/2012 | US8180593 Determination and control of wellbore fluid level, output flow, and desired pump operating speed, using a control system for a centrifugal pump disposed within the wellbore |
| 05/15/2012 | US8180571 Wellbore surveying |
| 05/15/2012 | US8179279 Method and device for producing hydrocarbons using wireless communication |
| 05/15/2012 | US8179278 Downhole communication devices and methods of use |
| 05/15/2012 | US8177958 Electro-chemical sensor |
| 05/15/2012 | US8176998 Method and device for core drilling |