| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 09/20/2011 | CA2550480C Depth control in coiled tubing operations |
| 09/20/2011 | CA2497269C Methods and systems to activate downhole tools with light |
| 09/19/2011 | CA2697323A1 Method and device for logging the fluid depth in a wellbore |
| 09/16/2011 | CA2733882A1 Method for monitoring a geological gas storage site by stratigraphic inversion of seismic data |
| 09/15/2011 | WO2011112391A1 Subterranean formation deformation monitoring systems |
| 09/15/2011 | WO2011110957A2 Logging system and methodology |
| 09/15/2011 | WO2011110914A2 Use of general bayesian networks in oilfield operations |
| 09/15/2011 | WO2011072135A3 Method and apparatus for borehole positioning |
| 09/15/2011 | WO2011041390A3 Optical coiled tubing log assembly |
| 09/15/2011 | WO2010046050A3 Apparatus and methods for improved cement plug placement |
| 09/15/2011 | US20110224907 Mineral insulated cable for downhole sensors |
| 09/15/2011 | US20110221883 Method and system for transmitting borehole image data |
| 09/15/2011 | US20110220411 Downhole acoustic sensing tool and method |
| 09/15/2011 | US20110220370 Method and system for fixing an element in a borehole |
| 09/15/2011 | US20110220350 Identification of lost circulation zones |
| 09/15/2011 | US20110220349 Methods for minimizing fluid loss to and determining the locations of lost circulation zones |
| 09/15/2011 | US20110219867 Measuring Apparatus with AE Sensor, Installing Method Thereof, and Set of the Measuring Apparatus |
| 09/15/2011 | US20110219866 Apparatus to Monitor Flow Assurance Properties in Conduits |
| 09/15/2011 | CA2827060A1 Logging system and methodology |
| 09/15/2011 | CA2792229A1 Downhole acoustic sensing tool and method |
| 09/15/2011 | CA2787424A1 Subterranean formation deformation monitoring systems |
| 09/14/2011 | EP2066869B1 Estimating a formation property |
| 09/14/2011 | CN201972698U 小口径微球形聚焦测井仪 Micro Focus small-diameter spherical Logging Tool |
| 09/14/2011 | CN201972697U 井下无缆声通讯接收器 Underground untethered acoustic communications receiver |
| 09/14/2011 | CN201972696U 井底信号传输装置 Signal transmitting means bottomhole |
| 09/14/2011 | CN201972695U 小口径双井径测井仪 Small caliber Dual Caliper Logging Tool |
| 09/14/2011 | CN201972694U 一种井底压力测量装置 One kind of downhole pressure measuring device |
| 09/14/2011 | CN201972693U Automatic continuous oil well liquid level detection instrument |
| 09/14/2011 | CN201972692U 便携式井深测量仪 Portable depth gauge |
| 09/14/2011 | CN201972691U 一种无线随钻测斜仪的高温探管 A wireless MWD inclinometer temperature probe |
| 09/14/2011 | CN201972690U 一种陀螺马笼头安全锁定密封装置 One kind of gyro bridle safety lock seal |
| 09/14/2011 | CN201972689U 一种煤层气井产出气测量装置 One kind of coalbed methane wells produced gas measuring device |
| 09/14/2011 | CN201972688U 井筒流量监测仪 Wellbore Flow Monitor |
| 09/14/2011 | CN201972687U 一种多功能计量装置 A multifunctional measuring device |
| 09/14/2011 | CN201972686U 一种新型声波测井仪用隔声装置 A new acoustic logging tool with acoustic devices |
| 09/14/2011 | CN201972684U 一种测量煤层气井产出液的装置 An apparatus for measuring the produced fluid CBM wells |
| 09/14/2011 | CN201972677U 油气计量装置 Oil and gas metering device |
| 09/14/2011 | CN1721654B Downhole formation testing tool |
| 09/14/2011 | CN102182452A Capillary-type pressure measuring device |
| 09/14/2011 | CN102182451A Oil logging depth measurement device |
| 09/14/2011 | CN102182450A Underground sensor assembly used for measurement while drilling of underground drilling |
| 09/14/2011 | CN102182449A Measuring device adopting solid-state vibration angular rate sensor group to realize north-seeking underground |
| 09/14/2011 | CN102182448A Orientated measurement guiding butt joint device |
| 09/14/2011 | CN102182447A Double-drum linked main engine for well logging and well testing |
| 09/14/2011 | CN102182446A Mine monitoring method and equipment |
| 09/14/2011 | CN102182445A Single-well remote metering measurement and control method and device |
| 09/14/2011 | CN102182444A Adaptive evaluation method for under-balanced drilling |
| 09/14/2011 | CN102182443A Deep well image acquisition system |
| 09/14/2011 | CN102182442A Method for preparing radioisotope tracer |
| 09/14/2011 | CN102182441A Method for locating underground non-cable test system |
| 09/14/2011 | CN102182440A Application of direct frequency synthesis method in measurement of resistivity of electromagnetic wave |
| 09/14/2011 | CN102182437A Method for determining and eliminating hydraulic fracture stress boundary of coal mine underground drilling |
| 09/14/2011 | CN101846537B Small liquid volume gas-liquid two-phase flowmeter |
| 09/13/2011 | US8016050 Methods and apparatuses for estimating drill bit cutting effectiveness |
| 09/13/2011 | US8016038 Method and apparatus to facilitate formation sampling |
| 09/13/2011 | US8016037 Drilling rigs with apparatus identification systems and methods |
| 09/13/2011 | US8016036 Tagging a formation for use in wellbore related operations |
| 09/13/2011 | US8016035 Chemical injection check valve incorporated into a tubing retrievable safety valve |
| 09/13/2011 | US8016034 Methods of fluid placement and diversion in subterranean formations |
| 09/13/2011 | US8016032 Well treatment device, method and system |
| 09/13/2011 | US8015869 Methods and apparatus to perform pressure testing of geological formations |
| 09/13/2011 | CA2643206C Self-orienting selectable locating collet and method for location within a wellbore |
| 09/13/2011 | CA2609350C Methods and devices for analyzing and controlling the propagation of waves in a borehole generated by water hammer |
| 09/13/2011 | CA2585046C Dynamic efficiency optimization of piezoelectric actuator |
| 09/13/2011 | CA2391165C Inclinometer system |
| 09/09/2011 | WO2011109782A1 Colloidal-crystal quantum dots as tracers in underground formations |
| 09/09/2011 | WO2011109462A1 Calibrating process for torque measuring apparatuse |
| 09/09/2011 | WO2011109014A1 Borehole flow modulator and inverted seismic source generating system |
| 09/09/2011 | WO2011085296A3 Rotary steerable tool employing a timed connection |
| 09/09/2011 | WO2011085059A3 Rotating drilling tool |
| 09/09/2011 | WO2011059342A3 Device and method for attaching an id-marker to a production pipe |
| 09/09/2011 | CA2791904A1 Flow restriction insert for differential pressure measurement |
| 09/09/2011 | CA2791710A1 Completion string deployment in a subterranean well |
| 09/09/2011 | CA2790396A1 Calibrating process for torque measuring apparatus |
| 09/09/2011 | CA2776572A1 Modified pulse sequence to estimate properties |
| 09/09/2011 | CA2695608A1 Mineral insulated cable for downhole sensors |
| 09/08/2011 | US20110214853 Tattle-tale apparatus |
| 09/08/2011 | US20110214498 Flow restriction insert for differential pressure measurement |
| 09/08/2011 | US20110214488 Colloidal-crystal quantum dots as tracers in underground formations |
| 09/07/2011 | CN201965279U 一种油田探测光缆 One kind of fiber optic probe oilfield |
| 09/07/2011 | CN201965246U 绳索取芯钻孔不提钻专用压水试验栓塞 Not to mention the rope core drilling drill a dedicated water pressure test embolism |
| 09/07/2011 | CN201963341U 煤矿瓦斯综合应用系统 Gas Comprehensive Application System |
| 09/07/2011 | CN201963299U 固定式量油装置 Fixed amount of oil installations |
| 09/07/2011 | CN201963298U 油井用一体式分层测压装置 Well manometry device with one-layered |
| 09/07/2011 | CN201963297U 天然气引压管线防冻堵装置 Gas pipeline antifreeze impulse blocking device |
| 09/07/2011 | CN201963296U 油井动液面深度连续测量和采出液连续计量装置 Continuous measurement of the depth of the well fluid level and produced fluid continuous metering device |
| 09/07/2011 | CN201963295U 一种随钻地层压力地面模拟测量装置 One kind of formation pressure while drilling terrestrial analog measuring device |
| 09/07/2011 | CN201963294U 热采井生产周期跟踪监测仪及监测系统 Thermal recovery wells and monitor the production cycle track monitoring system |
| 09/07/2011 | CN201963293U 能调节的测井仪器固定架连接装置 Logging instrument mounting bracket adjustable attachment means |
| 09/07/2011 | CN201963292U 油田单多井综合计量测试装置 Oilfield single multi-well integrated metering test device |
| 09/07/2011 | CN201963291U 一种存储式声幅变密度及温度压力组合测试仪 A storage-type acoustic amplitude varying density and temperature and pressure combination tester |
| 09/07/2011 | CN201963290U 测井绞车的遥控控制系统 Remote control system logging winch |
| 09/07/2011 | CN201963289U 便携式计算机控制采集井下油水界面检测仪 Portable computer to control the acquisition of downhole oil-water interface detectors |
| 09/07/2011 | CN201963266U 一种井下双管工艺管柱 A downhole twin-tube technology column |
| 09/07/2011 | CN201963211U 一种油井套管深度标志环 One kind of well casing depth markers ring |
| 09/07/2011 | CN201963210U 火驱注气电点火工艺管柱 Fire drive electric ignition gas injection process column |
| 09/07/2011 | CN201963208U 动力及信号传输钻杆 Power and signal transmission drill |
| 09/07/2011 | CN1668940B Marking of pipe joints |
| 09/07/2011 | CN102174888A Method for processing formation data based on lithologic parameter of reservoir rock |
| 09/07/2011 | CN102174887A Device for measuring annulus flow between sea bottom marine riser and drill column by using ultrasonic waves |