| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 04/04/2012 | CN202181895U 一种固定有传感器的钻井机探头 A fixed-drilling machine with a sensor probe |
| 04/04/2012 | CN202181894U 注水井可调节式井口测试支架 Injection Wells adjustable wellhead test racks |
| 04/04/2012 | CN202181893U 井下仪器缆头电压测量系统 Downhole instrument cable head voltage measurement system |
| 04/04/2012 | CN202181886U 新型实用减震器 New practical shock absorbers |
| 04/04/2012 | CN102400680A 活塞式负压脉冲波发生和检测装置 Piston negative pressure pulse wave generation and detection device |
| 04/04/2012 | CN102400679A 一种用于多级阵列声波测井中的切向极化单极子换能器 A multi-stage array acoustic logging cut for the polarization monopole transducer |
| 04/04/2012 | CN102400678A 一种近钻头测量仪器的数据采集传输装置 Near drill measurement instrument data acquisition and transmission devices |
| 04/04/2012 | CN102400677A Tester for bearing plugging |
| 04/04/2012 | CN102400676A 瓦斯钻孔水位及深度测量装置和系统 Water and gas drilling depth measurement devices and systems |
| 04/04/2012 | CN102400675A 井下钻孔方位确定方法和装置 Downhole drilling method and apparatus for determining the orientation |
| 04/04/2012 | CN102400674A 超临界二氧化碳井筒多相流动模拟试验装置 Supercritical carbon dioxide wellbore multiphase flow simulation test device |
| 04/04/2012 | CN102400673A 电缆快速接头捕捉短节 Cable Quick Connector capture short section |
| 04/04/2012 | CN102400672A Detecting system and method for lithology of ultrasmall-caliber drilling hole |
| 04/04/2012 | CN102400671A 随钻测井仪器柔性连接装置 LWD flexible connecting device |
| 04/04/2012 | CN102400670A 一种三维感应测井仪器线圈系的设计方法 A three-dimensional design method of induction coil system logging instrument |
| 04/04/2012 | CN102400660A 煤层气井测试装置用井下开关井阀 CBM wells with downhole test device switches wells valve |
| 04/04/2012 | CN101280681B 采用gps定位技术的油井憋压试验记录仪 Gps positioning techniques using oil pressure - Test Recorder |
| 04/04/2012 | CA2754284A1 Fluid level control mechanism |
| 04/03/2012 | US8146684 Coring apparatus with sensors |
| 04/03/2012 | US8146659 Method of modelling enhanced recovery by polymer injection |
| 04/03/2012 | US8146658 Providing a sensor array |
| 04/03/2012 | US8146656 Method to measure injector inflow profiles |
| 04/03/2012 | US8146655 Methods and apparatus for downhole characterization of emulsion stability |
| 04/03/2012 | US8146654 Composition and method for using waxy oil-external emulsions to modify reservoir permeability profiles |
| 04/03/2012 | US8146416 Methods and apparatus to perform stress testing of geological formations |
| 04/03/2012 | US8146415 Downhole gas chromatograph |
| 04/03/2012 | CA2615229C Method and apparatus for utilizing pressure signature in conjunction with fall time as indicator in oil and gas wells |
| 03/30/2012 | CA2752374A1 Downhole gas breakout sensor |
| 03/29/2012 | WO2012040328A2 Radon migration of acoustic data |
| 03/29/2012 | WO2012040210A2 Methods for producing fluids from geological formation |
| 03/29/2012 | WO2012038468A1 Contactless data communications coupling |
| 03/29/2012 | WO2011159900A3 Method and apparatus for detecting fluid flow modulation telemetry signals transmitted from and instrument in a wellbore |
| 03/29/2012 | US20120073805 Method for monitoring cement plugs |
| 03/29/2012 | US20120073804 System For Monitoring Linearity of Down-Hole Pumping Systems During Deployment and Related Methods |
| 03/29/2012 | US20120073363 Ding Inspection Device |
| 03/29/2012 | CA2811365A1 Contactless data communications coupling |
| 03/29/2012 | CA2810745A1 Methods for producing fluids from geological formation |
| 03/28/2012 | EP2433163A2 Downhole sensor tool with a sealed sensor outsert |
| 03/28/2012 | EP2433162A2 Optimization of neutron-gamma tools for inelastic gamma-ray logging |
| 03/28/2012 | EP2433161A2 Downhole sensor tool for nuclear measurements |
| 03/28/2012 | EP2433160A2 Method of monitoring a hydrocarbon reservoir |
| 03/28/2012 | EP2432968A2 Apparatus and method for modeling well designs and well performance |
| 03/28/2012 | EP2118437B1 Reservoir stimulation while running casing related applications |
| 03/28/2012 | CN202178482U 随钻测量仪器用旋转电气接口 MWD instrument with a rotary electrical interface |
| 03/28/2012 | CN202176329U 孔内定位测量仪 Hole positioning gauge |
| 03/28/2012 | CN202176328U 可排气钻井液含砂量测定仪 Sand can exhaust the amount of drilling fluid tester |
| 03/28/2012 | CN202176327U 一种天然气计量分离系统 One kind of gas metering separation system |
| 03/28/2012 | CN202176295U Adjustable centering sheet type drift well gauge for well testing |
| 03/28/2012 | CN102392636A Underground fluid channel parameter description method for water drive development of sandstone reservoir |
| 03/28/2012 | CN102392635A Underground well water level observation device |
| 03/28/2012 | CN102392634A Measuring device and measuring method for well-cementing annular weight loss of cement slurry |
| 03/28/2012 | CN102392633A New method for releasing underground radioactive tracer and device thereof |
| 03/28/2012 | CN102392632A Non-separation measuring instrument for wellhead ternary fluid |
| 03/28/2012 | CN102392631A Rotating joint for oil wells |
| 03/28/2012 | CN102390790A System, device and method for realizing operation protection of logging winch |
| 03/28/2012 | CN101182767B Down-hole boring tool (drill) tacheometry method and short node for down-hole tacheometry |
| 03/28/2012 | CN101182766B Measurement method of down-hole boring tool (drill) rotative velocity and direction and short node |
| 03/28/2012 | CN101169482B Method and system for earthquake prediction by monitoring pressure of off-production gas well |
| 03/28/2012 | CN101082276B Methods of characterizing underground formation and its measuring device |
| 03/27/2012 | US8145462 Field synthesis system and method for optimizing drilling operations |
| 03/27/2012 | US8145427 Assessing petroleum reservoir production and potential for increasing production rate |
| 03/27/2012 | US8143570 Method and apparatus for detecting while drilling underbalanced the presence and depth of water produced from the formation |
| 03/27/2012 | US8141635 Cased borehole tool orientation measurement |
| 03/27/2012 | US8141631 Deployment of underground sensors in casing |
| 03/27/2012 | US8141259 Method of determining the dip of a formation |
| 03/27/2012 | CA2617375C Interactive and/or secure activation of a tool |
| 03/27/2012 | CA2496162C Wellbore drilling system and method |
| 03/27/2012 | CA2448815C Flexible dynamic housing |
| 03/22/2012 | WO2012037458A2 Apparatus and methods for drilling wellbores by ranging existing boreholes using induction devices |
| 03/22/2012 | WO2012037452A2 Reservoir navigation using magnetic field of dc currents |
| 03/22/2012 | WO2012037390A2 Expandable tubular antenna feed line for through casing e/m communication |
| 03/22/2012 | WO2012037340A1 Real-time fracture detection and fracture orientation estimation |
| 03/22/2012 | WO2012037317A2 Method and apparatus for predicting petrophysical properties from nmr data in carbonate rocks |
| 03/22/2012 | WO2012037188A1 Improved formation evaluation capability from near-wellbore logging using relative permeability modifiers |
| 03/22/2012 | WO2012037097A1 Improved pad device for resistivity imaging in the wells with oil based drilling fluid |
| 03/22/2012 | WO2012036927A2 Downhole sensor assembly and method of using same |
| 03/22/2012 | WO2012035001A2 Drilling apparatus |
| 03/22/2012 | WO2010138961A8 Membrane for oil compensation |
| 03/22/2012 | US20120067645 Weight-on-bit drill sub |
| 03/22/2012 | US20120067644 Method and Apparatus for Directional Well Logging |
| 03/22/2012 | US20120067567 Downhole completion system with retrievable power unit |
| 03/22/2012 | CA2811633A1 Apparatus and methods for drilling wellbores by ranging existing boreholes using induction devices |
| 03/22/2012 | CA2811631A1 Reservoir navigation using magnetic field of dc currents |
| 03/22/2012 | CA2811237A1 Drilling apparatus |
| 03/22/2012 | CA2810403A1 Downhole sensor assembly and method of using same |
| 03/21/2012 | EP2430480A2 Compensated directional resistivity measurements |
| 03/21/2012 | EP2430479A2 Methods for making directional resistivity measurements |
| 03/21/2012 | CN202170793U 一种随钻声波测井装置和发射换能器 One kind of sonic logging while drilling apparatus and transmitting transducer |
| 03/21/2012 | CN202170792U 井眼径向变形的测量装置 Wellbore radial deformation measuring device |
| 03/21/2012 | CN202170791U 螺旋钻孔灌注桩机的测深装置 Sounding devices spiral Bored machine |
| 03/21/2012 | CN202170762U 井口线缆防碰装置 Wellhead cable anti-collision device |
| 03/21/2012 | CN102388203A Early kick detection in an oil and gas well |
| 03/21/2012 | CN102388202A Device for rotary moving gas and oil separating measuring system |
| 03/21/2012 | CN102383786A Sector cement bonding and sound wave time difference logging instrument |
| 03/21/2012 | CN102383785A Method and apparatus for measuring fluid process variable in a well |
| 03/21/2012 | CN102383784A Storage-type leaking layer position integrated measuring instrument |
| 03/21/2012 | CN102383783A Method for analyzing flow characteristic of oil and water in seam-hole type oil reservoir |
| 03/21/2012 | CN102383782A Small-diameter high temperature heat-insulating pressure measuring unit |
| 03/21/2012 | CN102383781A Method for measuring gas pressure of coal bed |
| 03/21/2012 | CN102383780A Working state monitoring device of radial drilling system |