| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 09/12/2008 | WO2008107855A2 Downhole load cell |
| 09/12/2008 | WO2008086464A3 System and method for determining the rotational alignment of drill string elements |
| 09/12/2008 | WO2008033225A3 Logging device with down-hole transceiver for operation in extreme temperatures |
| 09/11/2008 | US20080219097 Acoustic telemetry transceiver |
| 09/11/2008 | US20080218374 Method and apparatus for communicating signals to an instrument in a wellbore |
| 09/11/2008 | US20080217060 Auger boring machine with two-stage guidance control system |
| 09/11/2008 | US20080217057 Method for taking seismic measurements |
| 09/11/2008 | US20080217007 Methods and systems for robust and accurate determination of wireline depth in a borehole |
| 09/11/2008 | US20080217006 Methods and Apparatus for Determining Wellbore Parameters |
| 09/11/2008 | US20080217005 Automated oil well test classification |
| 09/11/2008 | US20080216577 Testing of bottomhole samplers using acoustics |
| 09/11/2008 | US20080216568 System and method for processing and transmitting information from measurements made while drilling |
| 09/10/2008 | EP1967689A2 Linear positioning sensor for downhole tools |
| 09/10/2008 | EP1397661B1 Method and apparatus for downhole fluid characterization using flxural mechanical resonators |
| 09/10/2008 | CN201111542Y Pressured rolling wheel propelling logging sealing device |
| 09/10/2008 | CN101263276A Interface and method for wellbore telemetry system |
| 09/10/2008 | CN101260804A Systems and methods for well data compression |
| 09/10/2008 | CN101260803A Method for monitoring oilfield high infiltration strip |
| 09/10/2008 | CN101260802A Oil, gas and water three phase oil well continuous metering device and its measurement method |
| 09/09/2008 | US7423932 Well bore communication pulser |
| 09/09/2008 | US7423931 Acoustic system for communication in pipelines |
| 09/09/2008 | CA2491545C Wellbore apparatus with sliding shields |
| 09/04/2008 | WO2008106022A1 Method and apparatus for collecting drill bit performance data |
| 09/04/2008 | WO2008104896A1 Determining a length of a carrier line deployed into a well based on an optical signal |
| 09/04/2008 | WO2008104750A1 Determining fluid rate and phase information for a hydrocarbon well using predictive models |
| 09/04/2008 | WO2008060893A3 Large bore packer and methods of setting same |
| 09/04/2008 | US20080215245 System and method for determining producibility of a formation using flexural mechanical resonator measurements |
| 09/04/2008 | US20080212691 Signalling Method and Apparatus |
| 09/04/2008 | US20080210468 Drill head connection and method |
| 09/04/2008 | US20080210422 Reservoir Stimulation While Running Casing |
| 09/04/2008 | US20080210421 Tagged Propping Agents and Related Methods |
| 09/04/2008 | DE102007008039A1 Verfahren zur Bestimmung vertikaler Variationen der Wärmeleitfähigkeit A method for determining the vertical variations of the thermal conductivity |
| 09/04/2008 | CA2676459A1 Method and apparatus for collecting drill bit performance data |
| 09/03/2008 | EP1965021A2 A method for collecting geological data |
| 09/03/2008 | EP1711681B1 Annulus plugging detection using a pressure transmitter in gas-lift oil production |
| 09/03/2008 | CN201110897Y 一种八侧向电极 An eight lateral electrode |
| 09/03/2008 | CN201110172Y Apparatus for conveying reducing cable pressured into well |
| 09/03/2008 | CN201110171Y Device for monitoring all-purpose real time parameter of wireless network type portable oil well and gas well |
| 09/03/2008 | CN201110157Y Casing tube sealer |
| 09/03/2008 | CN201110149Y Picking-infusion-measurement multifunctional cellar connection |
| 09/03/2008 | CN101255792A Making directional measurements using a rotating and non-rotating drilling apparatus |
| 09/03/2008 | CN101255791A Apparatus for measuring flow of oil gas water multiphase flow |
| 09/02/2008 | US7420121 Structure for a cable connection head |
| 09/02/2008 | US7418865 Method and apparatus for ultrasound velocity measurements in drilling fluids |
| 09/02/2008 | CA2503816C Formation imaging while drilling in non-conductive fluids |
| 09/02/2008 | CA2500036C Apparatus and method for generating electrical power in a borehole |
| 09/02/2008 | CA2482487C Permanent downhole deployment of optical sensors |
| 08/28/2008 | WO2008103487A1 Drilling collaboration infrastructure |
| 08/28/2008 | WO2008102170A1 Signal processing in downhole equipment |
| 08/28/2008 | WO2008101333A1 Fluid level sensing device and methods of using same |
| 08/28/2008 | WO2008101285A1 Method and apparatus for modelling the interaction of a drill bit with the earth formation |
| 08/28/2008 | WO2008036790A3 Downhole depth computation methods and related system |
| 08/28/2008 | WO2008021143A3 Providing increased number of measurements and deeper depth of investigation from existing propagation resistivity tool hardware |
| 08/28/2008 | US20080208476 System and method for waterflood performance monitoring |
| 08/28/2008 | US20080208475 Drilling collaboration infrastructure |
| 08/28/2008 | US20080202810 Apparatus for determining the dynamic forces on a drill string during drilling operations |
| 08/28/2008 | US20080202768 Device for Selective Movement of Well Tools and Also a Method of Using Same |
| 08/28/2008 | US20080202767 Drill Pipe Conveyance System for Slim Logging Tool |
| 08/28/2008 | US20080202747 Methods of marking a zone of a wellbore for localizing the source of produced particulate |
| 08/28/2008 | US20080202745 Fluid level sensing device and methods of using same |
| 08/28/2008 | US20080201969 Orientation Sensing Apparatus and a Method For Determining an Orientation |
| 08/28/2008 | CA2678726A1 Fluid level sensing device and methods of using same |
| 08/28/2008 | CA2677881A1 Signal processing in downhole equipment |
| 08/27/2008 | EP1960634A2 Method and apparatus for investigating a borehole with a caliper |
| 08/27/2008 | EP1841948B1 A method for facilitating a wellbore operation |
| 08/27/2008 | CN201107591Y Motor remote controlling device of well logging instrument |
| 08/27/2008 | CN201106448Y Built-in pressure meter holding barrel |
| 08/27/2008 | CN201106447Y Device for monitoring pressure below coal bed gas well |
| 08/27/2008 | CN201106446Y Continuous pipe logging serpentinepipe machine |
| 08/27/2008 | CN201106445Y Reducing tow device for casing horizontal well logging dragging device |
| 08/27/2008 | CN101253304A Bi-directional drill string telemetry for measurement and drilling control |
| 08/27/2008 | CN101251512A Portable steady magnetic field jackrod mass detecting instrument |
| 08/27/2008 | CN101251009A Optical fiber and optical grating pressure sensor |
| 08/27/2008 | CN101251008A Optical fiber sensing method for synchronously testing temperature and pressure below horizontal well |
| 08/27/2008 | CN101251007A Inserting-mounting type electrohydraulic integration device |
| 08/26/2008 | US7417920 Reciprocating pulser for mud pulse telemetry |
| 08/26/2008 | US7416033 Instrumented drill head, related drilling/bolting machines, and methods |
| 08/26/2008 | US7416028 Telemetry system for the bi-directional communication of data between a well point and a terminal unit situated on the surface |
| 08/26/2008 | US7416026 Apparatus for changing flowbore fluid temperature |
| 08/26/2008 | US7416023 Formation pressure testing apparatus with flexible member and method of formation pressure testing |
| 08/26/2008 | CA2498084C Retrievable downhole flow meter |
| 08/26/2008 | CA2495342C Use of distributed temperature sensors during wellbore treatments |
| 08/26/2008 | CA2472855C Apparatus and methods for reducing borehole current effects |
| 08/26/2008 | CA2436173C Universal downhole tool control apparatus and methods |
| 08/26/2008 | CA2424709C Multiplexed distribution of optical power |
| 08/26/2008 | CA2270637C A method for determining drill collar whirl in a bottom hole assembly and method for determining borehole size |
| 08/26/2008 | CA2259569C Downhole tool and method |
| 08/23/2008 | CA2618157A1 Measurement-while-drilling mud pulse telemetry reflection cancelation |
| 08/21/2008 | WO2008101005A1 Ram bop position sensor |
| 08/21/2008 | WO2008098380A1 Method and apparatus for fluid migration profiling |
| 08/21/2008 | WO2008083049A3 Deployment tool for well logging instruments conveyed through the interior of a pipe string |
| 08/21/2008 | WO2008083016A3 Sensing tool |
| 08/21/2008 | WO2008070829A3 Automated mse-based drilling apparatus and methods |
| 08/21/2008 | WO2008058058A3 Apparatus and method for estimating filtrate contamination in a formation fluid |
| 08/21/2008 | US20080201080 Determining fluid and/or reservoir information using an instrumented completion |
| 08/21/2008 | US20080196891 Communication tool and method for a subsurface safety valve with communication component |
| 08/21/2008 | US20080196888 Ram bop position sensor |
| 08/21/2008 | US20080196887 Apparatus and method for active circuit protection of downhole electrical submersible pump monitoring gauges |
| 08/21/2008 | US20080196886 Casing Vent Security Device |
| 08/21/2008 | DE102007007766A1 Boring tool e.g. rod-driven boring tool, component for horizontal boring, has two metallic end caps defining ends respectively, where non-metallic housing section extends between two end caps |