| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 01/26/2006 | US20060016592 Kick warning system using high frequency fluid mode in a borehole |
| 01/26/2006 | DE102005029349A1 Drahtleitungsgebundene Anordnung, Verfahren zum Beurteilen einer unterirdischen Formation, Bohrloch-Werkzeug und Verfahren zur Probennahme in einem Bohrloch Conducted wire assembly method for evaluating a subterranean formation downhole tool and method for sampling in a borehole |
| 01/25/2006 | EP1619352A1 Method and system for accessing subterranean deposits from the surface |
| 01/25/2006 | EP1618283A1 Well string assembly |
| 01/25/2006 | EP1248893B1 Integrated transmitter surveying while boring (swb) entrenching powering device for the continuation of a guided bore hole |
| 01/25/2006 | EP1185761B1 Acoustic telemetry system with drilling noise cancellation |
| 01/25/2006 | CN2753881Y Electronic-sensing type well-diameter micro electrode combined logging instrument |
| 01/25/2006 | CN2753880Y Oil pumping motor-pumped well eccentric pipe anchoring test tubular column |
| 01/25/2006 | CN2753879Y Regulating-free packing leather |
| 01/24/2006 | US6990045 Methods for acquiring seismic data while tripping |
| 01/24/2006 | US6989764 Apparatus and method for downhole well equipment and process management, identification, and actuation |
| 01/24/2006 | US6988566 Acoustic position measurement system for well bore formation |
| 01/24/2006 | US6988547 Method and system of fluid analysis and control in hydrocarbon well |
| 01/24/2006 | CA2361789C An arrangement and method for deploying downhole tools |
| 01/24/2006 | CA2332875C Single point contact acoustic transmitter |
| 01/24/2006 | CA2190772C Seismic prospecting method and device using a drilling tool in a well |
| 01/24/2006 | CA2180883C Hydraulic test system mounted with borehole television set for simultaneous observation in front and lateral directions |
| 01/19/2006 | WO2006005555A1 Sensor system |
| 01/19/2006 | WO2005106396A3 Direct measurement of brillouin frequency in distributed optical sensing systems |
| 01/19/2006 | US20060015257 Incremental depth measurement for real-time calculation of dip and azimuth |
| 01/19/2006 | US20060010973 Method and Apparatus for Measuring Fluid Properties |
| 01/19/2006 | CA2847634A1 Acoustic telemetry transceiver |
| 01/19/2006 | CA2847633A1 Acoustic telemetry transceiver |
| 01/19/2006 | CA2576003A1 Acoustic telemetry transceiver |
| 01/19/2006 | CA2573665A1 Detector for distinguishing phases in a multiphase fluid mixture |
| 01/19/2006 | CA2572999A1 Sensor system |
| 01/18/2006 | EP1616162A1 Apparatus to measure differential pressure with settable pressure reference |
| 01/18/2006 | EP0948703B1 Apparatus and method for expanding a liner patch; a stroke indicator; and a tubular patch |
| 01/18/2006 | EP0948700B1 Whipstock |
| 01/18/2006 | CN2752425Y High-efficiency wire-line workover unit |
| 01/18/2006 | CN1723406A System and method for deploying an optical fiber in a well |
| 01/18/2006 | CN1723332A Method and apparatus for logging a well using a fiber optic line and sensors |
| 01/18/2006 | CN1721655A Improved rotary pulser for transmitting information to the surface from a drill string down hole in a well |
| 01/18/2006 | CN1721654A Downhole formation testing tool |
| 01/17/2006 | US6987463 Method for collecting geological data from a well bore using casing mounted sensors |
| 01/17/2006 | US6986396 Method for determining sweep efficiency for removing cuttings from a borehole |
| 01/17/2006 | US6986389 Adjustable deployment apparatus for an actively clamped tubing-conveyed in-well seismic station |
| 01/17/2006 | US6986282 Method and apparatus for determining downhole pressures during a drilling operation |
| 01/17/2006 | US6986281 Exfiltrometer apparatus and method for measuring unsaturated hydrologic properties in soil |
| 01/14/2006 | CA2511788A1 Apparatus and system for well placement and reservoir characterization |
| 01/12/2006 | WO2006004740A2 Baker hughes incorporated |
| 01/12/2006 | WO2006004426A1 System for delivery of a tracer in fluid transport systems and use thereof |
| 01/12/2006 | WO2006003208A1 Method and system for inserting a fiber optical sensing cable into an underwater well |
| 01/12/2006 | WO2006003190A1 Monitoring fluid pressure in a well and retrievable pressure sensor assembly for use in the method |
| 01/12/2006 | WO2006003118A1 Closed loop control system for controlling production of hydrocarbon fluid from an underground formation |
| 01/12/2006 | WO2005091883A3 Extracting and processing hydrocarbon-bearing formations |
| 01/12/2006 | US20060008913 Microfluidic separator |
| 01/12/2006 | US20060006000 Borehole drilling control system, method and apparatus |
| 01/12/2006 | US20060005965 Sensor system |
| 01/12/2006 | CA2572866A1 Method and system for inserting a fiber optical sensing cable into an underwater well |
| 01/12/2006 | CA2572703A1 Intervention rod |
| 01/12/2006 | CA2572686A1 Monitoring fluid pressure in a well and retrievable pressure sensor assembly for use in the method |
| 01/12/2006 | CA2570058A1 Closed loop control system for controlling production of hydrocarbon fluid from an underground formation |
| 01/12/2006 | CA2569090A1 System for delivery of a tracer in fluid transport systems and use thereof |
| 01/11/2006 | EP1613981A1 Use of pattern recognition in a measurement of formation transit time for seismic checkshots |
| 01/11/2006 | EP1613838A1 Drill hole measuring device and rock drilling unit |
| 01/11/2006 | EP1613837A1 System for managing borehole information |
| 01/11/2006 | EP1502005A4 Method and apparatus for determining drill string movement mode |
| 01/11/2006 | EP1502004A4 System and method for interpreting drilling data |
| 01/11/2006 | EP1502003A4 Method for improving drilling depth measurements |
| 01/11/2006 | EP1492936B1 Method and device for detecting leaks in an annulus of a riser |
| 01/11/2006 | EP1354125B1 Pressure pulse generator for mwd |
| 01/11/2006 | EP1012443B1 Subsurface measurement apparatus, system, and process for improved well drilling, control, and production |
| 01/11/2006 | CN1720386A Method and system for circulating fluid in a well system |
| 01/11/2006 | CN1718999A Detecting method of gas content ratio in gas liquid two phase flow |
| 01/11/2006 | CN1718998A Tension nipple of under well logging instrument |
| 01/11/2006 | CN1718997A Well monitoring method using radio isotope |
| 01/11/2006 | CN1718996A Data collection circuit and control module |
| 01/11/2006 | CN1718993A Interference happening guiding centralising device |
| 01/11/2006 | CN1236307C Low-frequency sound wave stacked piezo-electric transducer |
| 01/10/2006 | US6985814 Well twinning techniques in borehole surveying |
| 01/10/2006 | US6985086 Method and apparatus for LWD shear velocity measurement |
| 01/10/2006 | US6983803 Equalizer valve and associated method for sealing a fluid flow |
| 01/10/2006 | US6983796 Method of providing hydraulic/fiber conduits adjacent bottom hole assemblies for multi-step completions |
| 01/10/2006 | CA2278933C Tool and method for drilling a lateral well |
| 01/10/2006 | CA2247332C Downhole core sampling and testing apparatus |
| 01/09/2006 | CA2506912A1 Improved rotary pulser for transmitting information to the surface from a drill string down hole in a well |
| 01/05/2006 | WO2006002223A1 Drilling wellbores with optimal physical drill string conditions |
| 01/05/2006 | WO2006001974A2 Pressure monitoring of control lines for tool position feedback |
| 01/05/2006 | WO2006001831A2 Downhole library of master wavelets for vsp-while-drilling applications |
| 01/05/2006 | WO2006001704A1 A method of filtering pump noise |
| 01/05/2006 | WO2006000796A2 Signalling method |
| 01/05/2006 | WO2006000742A1 System and method for monitoring and removing blockage in a downhole oil and gas recovery operation |
| 01/05/2006 | WO2006000438A1 Deployment of underground sensors in casing |
| 01/05/2006 | WO2005086736A3 Providing a local response to a local condition in an oil well |
| 01/05/2006 | US20060000605 Apparatus and method |
| 01/05/2006 | US20060000604 Radio frequency tags for turbulent flows |
| 01/05/2006 | US20060000267 Exfiltrometer apparatus and method for measuring unsaturated hydrologic properties in soil |
| 01/05/2006 | DE102004026381B3 Verfahren und Vorrichtung zur Messung der Temperatur oder anderen Größen in einer U-förmigen Erdwärmesonde sowie Ausspülanordnung dafür Method and apparatus for measuring the temperature or other parameters in a U-shaped geothermal probe and Ausspülanordnung for |
| 01/05/2006 | CA2702321A1 Electrical signalling system |
| 01/05/2006 | CA2571709A1 Deployment of underground sensors in casing |
| 01/05/2006 | CA2571190A1 A method of filtering pump noise |
| 01/05/2006 | CA2571037A1 Signalling method |
| 01/04/2006 | EP1611312A1 Drifting tubing |
| 01/04/2006 | EP1412605A4 Improved stabilizer for use in a drill string |
| 01/04/2006 | EP1334261B1 Apparatus and method for formation testing while drilling using combined absolute and differential pressure measurement |
| 01/04/2006 | CN1715955A Method of seismic source monitoring using modeled source signatures with calibration functions |
| 01/03/2006 | US6981553 Controlled downhole chemical injection |
| 01/03/2006 | US6981550 Sonde |
| 01/03/2006 | US6981549 Hydraulic fracturing method |