| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 03/01/2012 | US20120048539 Reservoir Pressure Monitoring |
| 03/01/2012 | US20120048538 Apparatus and methods for providing information about one or more subterranean variables |
| 03/01/2012 | US20120048009 Method, system, use of the system and reinforcement member for rock reinforcement |
| 03/01/2012 | US20120048008 Apparatus and methods for continuous compatibility testing of subterranean fluids and their compositions under wellbore conditions |
| 03/01/2012 | CA2809173A1 Method of acoustic ranging |
| 03/01/2012 | CA2808408A1 Method and apparatus for creating a planar cavern |
| 03/01/2012 | CA2807030A1 Well logging tool |
| 03/01/2012 | CA2804835A1 Method and system of determining elemental content of an earth formation |
| 02/29/2012 | EP2423429A1 Valve condition monitoring |
| 02/29/2012 | CN202152679U 钻井现场录井仪参数无线传输系统 Drilling site logging instrument parameters of the wireless transmission system |
| 02/29/2012 | CN202152678U 一种新型毛细管传压筒装置 A new capillary tube apparatus pressure transmission |
| 02/29/2012 | CN202152677U 固定式地滑轮 Fixed to a pulley |
| 02/29/2012 | CN202152676U 一种用于气井在线测量的柱塞装置及柱塞排液采气系统 A plunger device for online measurement of gas and liquid discharge plunger Gas System |
| 02/29/2012 | CN202152671U 气井排液采气用柱塞工具 Gas wells drain plunger tool |
| 02/29/2012 | CN202152659U 井口防盗封井器 Wellhead blowout preventer theft |
| 02/29/2012 | CN202152643U 多层系开采油井的分层求产测压管柱 Multi-tiered system of exploitation of oil production manometry seeking column |
| 02/29/2012 | CN102364047A Geometric parameter measuring method for vertical shaft |
| 02/29/2012 | CN102364046A Multi-phase flow meter for underground pipeline |
| 02/28/2012 | US8122954 Downhole depth computation methods and related system |
| 02/28/2012 | US8122951 Systems and methods of downhole thermal property measurement |
| 02/28/2012 | US8122905 Method and arrangement for diagnosis of a final control element |
| 02/28/2012 | CA2547521C Apparatus and methods for measurement of solids in a wellbore |
| 02/23/2012 | WO2012024492A2 Methods for borehole measurements of fracturing pressures |
| 02/23/2012 | WO2012024474A2 System and method for estimating directional characteristics based on bending moment measurements |
| 02/23/2012 | WO2012024127A2 Downhole closed-loop geosteering methodology |
| 02/23/2012 | WO2012024121A2 Acoustic waveform stacking using azimuthal and/or standoff binning |
| 02/23/2012 | WO2012003146A3 Blowout preventer monitoring system and method of using same |
| 02/23/2012 | WO2011159508A3 Improved determination of conductive formation orientation by making wellbore sonde error correction |
| 02/23/2012 | WO2011133421A3 Method of predicting source rock thermal maturity from log responses |
| 02/23/2012 | US20120046870 Multiphase flow meter for subsea applications using hydrate inhibitor measurement |
| 02/23/2012 | US20120046865 System and Method for Estimating Directional Characteristics Based on Bending Moment Measurements |
| 02/23/2012 | US20120043079 Sand control well completion method and apparatus |
| 02/23/2012 | US20120043069 Downhole wireline wireless communication |
| 02/23/2012 | CA2808615A1 Acoustic waveform stacking using azimuthal and/or standoff binning |
| 02/23/2012 | CA2749767A1 A complex tool for well monitoring |
| 02/22/2012 | EP2420679A1 Method, arrangement and a computer program product for determining correct running direction a fluid flow generating apparatus |
| 02/22/2012 | EP2419765A2 A microfluidic oscillating tube densitometer for downhole applications |
| 02/22/2012 | EP2419605A1 A communication arrangement for transmission of communication signals along a pipe line |
| 02/22/2012 | EP2419604A2 Downhole valve tool and method of use |
| 02/22/2012 | EP2419603A2 Multiple stage mechanical drift tool |
| 02/22/2012 | EP2087202B1 An apparatus for creating pressure pulses in the fluid of a bore hole |
| 02/22/2012 | CN202148902U 具有自动生成密码功能的电子锁 With automatically generated password feature electronic lock |
| 02/22/2012 | CN202148899U 一种自动控制液体流动检测装置 An automatic control of liquid flow detection device |
| 02/22/2012 | CN202148898U 井下方位角、倾角测定装置 Downhole azimuth, inclination measuring device |
| 02/22/2012 | CN202148897U 新型油井测试仪测试垫片 The new oil tester shims |
| 02/22/2012 | CN102360703A Magnet structure of petroleum underground nuclear magnetic resonance logging while drilling apparatus |
| 02/22/2012 | CN102359369A Range determination method for horizontally-connected well |
| 02/22/2012 | CN102359368A Working fluid level prediction method for submersible reciprocating-type oil pumping unit based on support vector machine |
| 02/22/2012 | CN102359353A Closed-loop controlled-pressure well drilling system |
| 02/22/2012 | CN102359350A Centering device |
| 02/22/2012 | CN101338668B 测定钻井液溢漏的方法及系统 Method and system for measuring drilling fluid spills |
| 02/21/2012 | US8118094 Tracer injector tool for well investigation |
| 02/21/2012 | US8118093 Threaded retention device for downhole transmission lines |
| 02/21/2012 | US8117907 Caliper logging using circumferentially spaced and/or angled transducer elements |
| 02/21/2012 | CA2617418C Interface and method for wellbore telemetry system |
| 02/21/2012 | CA2616892C Hole depth sensing |
| 02/21/2012 | CA2534386C Method for installing a double ended distributed sensing fiber optical assembly within a guide conduit |
| 02/16/2012 | WO2012021485A2 Method and apparatus for measuring fluid process variable in a well |
| 02/16/2012 | WO2012021393A2 Low frequency formation shear slowness from drilling noise derived quadrupole array data |
| 02/16/2012 | WO2012020891A1 Method for detecting gas outflow from an underground gas storage layer by means of pressure monitoring, and an underground gas storage system |
| 02/16/2012 | WO2011160046A3 Apparatus for use downhole including devices having heat carrier channels |
| 02/16/2012 | WO2011128355A3 System for installing and testing subsea wellhead equipment |
| 02/16/2012 | WO2011119528A3 Determining the larmor frequency for nmr tools |
| 02/16/2012 | WO2011004180A3 Downhole apparatus, device, assembly and method |
| 02/16/2012 | US20120039668 Method of detecting gas leakage in geological gas reservoir by using pressure monitoring and geological gas storage system |
| 02/16/2012 | US20120039358 Device for Measuring Temperature in Electromagnetic Fields |
| 02/16/2012 | US20120039151 Mud pulse telemetry synchronous time averaging system |
| 02/16/2012 | US20120037423 Low Frequency Formation Shear Slowness From Drilling Noise Derived Quadrupole Array Data |
| 02/16/2012 | US20120037422 Drilling tool, apparatus and method for underreaming and simultaneously monitoring and controlling wellbore diameter |
| 02/16/2012 | US20120037361 Arrangement and method for detecting fluid influx and/or loss in a well bore |
| 02/16/2012 | US20120037360 Actuators and related methods |
| 02/16/2012 | US20120036924 Method and apparatus for measuring fluid process variable in a well |
| 02/16/2012 | CA2808181A1 Method and apparatus for measuring fluid process variable in a well |
| 02/15/2012 | EP2418466A2 Fiber optic cable for distributed acoustic sensing with increased acoustic sensitivity |
| 02/15/2012 | EP2418351A1 A mud pulse telemetry synchronous time averaging system |
| 02/15/2012 | EP2418350A1 A method for analysing a downhole fluid |
| 02/15/2012 | EP2418349A1 Method for monitoring the oil-field development |
| 02/15/2012 | EP2417331A1 Annulus mud flow rate measurement while drilling and use thereof to detect well dysfunction |
| 02/15/2012 | EP2191102B1 Down-hole wireless communication system |
| 02/15/2012 | CN202144739U 高压防盗快速测压取样接头 Pressure sampling high pressure quick connector theft |
| 02/15/2012 | CN202144738U 快速对接两路屏蔽用64芯承压接头 Fast docking two-way shielded connectors with 64 core pressure |
| 02/15/2012 | CN102356212A Relative and absolute error models for subterranean wells |
| 02/15/2012 | CN102354501A Unidirectional echo and noise suppression method used in drill string acoustic transmission technology |
| 02/15/2012 | CN102352748A Polar plate of micro-disc type focused logging device |
| 02/15/2012 | CN102352742A Method for returning and sampling polymer solution in bottom hole |
| 02/15/2012 | CN101440700B 解脱封堵测试阀 Test relief valve closure |
| 02/14/2012 | US8116980 Testing process for hydrocarbon wells at zero emissions |
| 02/14/2012 | US8115495 Wired pipe signal transmission testing apparatus and method |
| 02/14/2012 | US8113298 Wireline communication system for deep wells |
| 02/14/2012 | US8113284 Use of distributed temperature sensors during wellbore treatments |
| 02/14/2012 | US8113279 Apparatus and method for instantaneously injecting tracer for groundwater well |
| 02/14/2012 | US8113044 Downhole 4D pressure measurement apparatus and method for permeability characterization |
| 02/14/2012 | CA2501480C System and method for installation and use of devices in microboreholes |
| 02/09/2012 | WO2012019183A1 Apparatus and methods for real time communication in drill strings |
| 02/09/2012 | WO2012019182A1 Apparatus and methods for real time communication between drill bit and drilling assembly |
| 02/09/2012 | WO2012018920A1 Apparatus and method for downhole energy conversion |
| 02/09/2012 | WO2012018683A1 Tagged scale inhibitor compositions and methods of inhibiting scale |
| 02/09/2012 | WO2012017065A2 Clamp |
| 02/09/2012 | WO2011127114A3 Oil-based mud imager with a line source |
| 02/09/2012 | WO2011012838A3 Measurement apparatus |