| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 07/23/2009 | WO2009090460A2 Method for calculating the ratio of relative permeabilities of formation fluids and wettability of a formation downhole, and a formation testing tool to implement the same |
| 07/23/2009 | WO2009090455A2 Optical fiber system and method for wellhole sensing of magnetic permeability using diffraction effect of faraday rotator |
| 07/23/2009 | US20090183917 System and apparatus for locating and avoiding an underground obstacle |
| 07/23/2009 | US20090183871 Filling the voids with impurity reactive particles of activated carbon, coke breeze, zero-valent iron, apatite, organophilic clay, zeolite, polymeric ion exchange resins, polymeric adsorbing resin, by vibration or vacuum; heat sealing a cover sheet on top and edge; control soil or water contamination |
| 07/23/2009 | CA2712467A1 Method for 3-c 3-d wavefield decomposition |
| 07/23/2009 | CA2712271A1 Identification of stress in formations using angles of fast and slow dipole waves in borehole acoustic logging |
| 07/23/2009 | CA2709714A1 Optical fiber system and method for wellhole sensing of magnetic permeability using diffraction effect of faraday rotator |
| 07/23/2009 | CA2709344A1 Method for calculating the ratio of relative permeabilities of formation fluids and wettability of a formation downhole, and a formation testing tool to implement the same |
| 07/22/2009 | WO2009094253A1 Downhole characterization of formation fluid as a function of temperature |
| 07/22/2009 | CN201277028Y 永久式压力温度计 Permanent pressure thermometer |
| 07/22/2009 | CN201277027Y Independent orienting locator of horizontal guiding drill |
| 07/22/2009 | CN201277026Y Multifunctional tensiometer detection platform |
| 07/22/2009 | CN201277025Y Calibration apparatus for metering separator |
| 07/22/2009 | CN101487473A Submersible pump |
| 07/22/2009 | CN101487388A Gas testing method and device for worked-out section of stope of coal mines |
| 07/22/2009 | CN101487387A Lithologic delamination method for complex layered dam base |
| 07/22/2009 | CN100516929C A combined propagation and lateral resistivity downhole tool |
| 07/22/2009 | CN100516460C Method for installing a double ended distributed sensing fiber optical assembly within a guide conduit |
| 07/22/2009 | CN100516459C Reciprocating multi-testing arm well diameter tester |
| 07/22/2009 | CA2712957A1 Downhole characterization of formation fluid as a function of temperature |
| 07/21/2009 | US7564741 Intelligent efficient servo-actuator for a downhole pulser |
| 07/21/2009 | US7562723 Method for determining formation fluid entry into or drilling fluid loss from a borehole using a dynamic annular pressure control system |
| 07/21/2009 | US7562722 Method and apparatus for establishing the position of a sonde in a region using a single detector |
| 07/21/2009 | US7562712 Setting tool for hydraulically actuated devices |
| 07/21/2009 | CA2497027C Apparatus and methods for utilizing a downhole deployment valve |
| 07/21/2009 | CA2484902C Mwd formation tester |
| 07/16/2009 | WO2009089437A2 Downhole communication system and method |
| 07/16/2009 | WO2009089258A2 Joint compression of multiple echo trains using principal component analysis and independent component analysis |
| 07/16/2009 | WO2009089174A1 Downhole tool delivery system |
| 07/16/2009 | WO2009088816A2 Systems and methods for well data analysis |
| 07/16/2009 | WO2009088555A2 Temperature and pressure sensor using four wave mixing technique |
| 07/16/2009 | WO2009087444A1 Method of operating an oil well |
| 07/16/2009 | WO2009086637A1 Electromagnetic telemetry assembly with protected antenna |
| 07/16/2009 | US20090179648 Combined propagation and lateral resistivity downhole tool |
| 07/16/2009 | US20090178921 Electro-chemical sensor |
| 07/16/2009 | US20090178851 Borehole drilling control system, method and apparatus |
| 07/16/2009 | US20090178850 Method and system for precise drilling guidance of twin wells |
| 07/16/2009 | US20090178849 Apparatus and Method For Producing Soil Elements Underground |
| 07/16/2009 | US20090178803 Method of heating sub sea esp pumping system |
| 07/16/2009 | US20090178802 Parasitically powered signal source and method |
| 07/16/2009 | US20090178476 Fluid Flow Measuring Device And Method of Manufacturing Thereof |
| 07/16/2009 | CA2711853A1 Electromagnetic telemetry assembly with protected antenna |
| 07/16/2009 | CA2711494A1 Joint compression of multiple echo trains using principal component analysis and independent component analysis |
| 07/16/2009 | CA2711318A1 Downhole tool delivery system |
| 07/15/2009 | EP2078820A2 Coiled tubing wellbore drilling and surveying using a through the drill bit apparatus |
| 07/15/2009 | EP1774136B1 Well characterisation method |
| 07/15/2009 | EP1277069B1 Probe for detecting the structure of a dielectric medium |
| 07/15/2009 | CN201273188Y Integrated water exploration pipe column of casing tube well-completion horizontal well |
| 07/15/2009 | CN201273187Y Formation pressure detection apparatus while drilling |
| 07/15/2009 | CN201273186Y Working fluid level on-line measurement apparatus for rodless pump well |
| 07/15/2009 | CN201273185Y Special band and special tool for bundling leather bag |
| 07/15/2009 | CN201273184Y Miniature intelligent well cementing turbine flow data collector |
| 07/15/2009 | CN101482012A Inner sealing surface depth measurer for special petroleum pipe |
| 07/15/2009 | CN101482011A Control nipple for exploring tube of multi-shot survey instrument |
| 07/15/2009 | CN101482010A While-drilling multi-frequency direction induction resistivity survey instrument |
| 07/15/2009 | CN101482009A High-temperature high-pressure multifunctional horizontal well damage appraisement instrument |
| 07/15/2009 | CN101482008A Use method of down-hole hole drilling quality check equipment |
| 07/15/2009 | CN100513743C Near-bit logging data motor-passing wired transmission device |
| 07/15/2009 | CN100513742C Electromagnetic telemetering method and system of measuring by bit |
| 07/15/2009 | CN100513741C Automatic tracking method and device for bottom depth of well and borehole trace |
| 07/15/2009 | CN100513740C Method in situ recovery from a hydrocarbon containing formation using barriers |
| 07/15/2009 | CA2855225A1 Dynamic reservoir engineering |
| 07/14/2009 | US7561771 Method for installing a double ended distributed sensing fiber optical assembly within a guide conduit |
| 07/14/2009 | US7560690 System for delivery of a tracer in fluid transport systems and use thereof |
| 07/14/2009 | CA2540619C Make-up control system for tubulars |
| 07/14/2009 | CA2519066C Method to measure injector inflow profiles |
| 07/14/2009 | CA2382974C Accelerometer caliper while drilling |
| 07/11/2009 | CA2648257A1 Input deck migrator for simulators |
| 07/09/2009 | WO2009086323A1 Telescopic joint mini control panel |
| 07/09/2009 | WO2009086279A2 Acoustic measurements with downhole sampling and testing tools |
| 07/09/2009 | WO2009086094A1 Integrated quill position and toolface orientation display |
| 07/09/2009 | WO2009085812A2 Method and system to automatically correct lwd depth measurements |
| 07/09/2009 | WO2009085615A2 Borehole imaging and orientation of downhole tools |
| 07/09/2009 | WO2009085611A2 Apparatus and method for monitoring acoustic energy in a borehole |
| 07/09/2009 | WO2009085502A2 Determining drillstring neutral point based on hydraulic factor |
| 07/09/2009 | WO2009085353A1 Monitoring, controlling and enhancing processes while stimulating a fluid-filled borehole |
| 07/09/2009 | WO2009085341A2 Wireless perforating gun initiation |
| 07/09/2009 | WO2009085044A1 Purging of fiber optic conduits in subterranean wells |
| 07/09/2009 | WO2009084973A1 Methods of forecasting and analysing gas-condensate flows into a well |
| 07/09/2009 | WO2009083805A2 Subsurface formation core acquisition system usinghigh speed data and control telemetry |
| 07/09/2009 | WO2009064655A3 Position sensor for a downhole completion device |
| 07/09/2009 | WO2009052114A3 Water sensing adaptable inflow control device using a powered system |
| 07/09/2009 | WO2009047708A3 Electrically activating a jarring tool |
| 07/09/2009 | US20090177403 Logging While Drilling System |
| 07/09/2009 | US20090175415 Method of visualizing target objects in a fluid-carrying pipe |
| 07/09/2009 | US20090173541 Rotary steerable tool |
| 07/09/2009 | US20090173538 Tripping Indicator For MWD Systems |
| 07/09/2009 | US20090173500 Method and Apparatus for Well Treatment |
| 07/09/2009 | US20090173495 Drifting Tubing |
| 07/09/2009 | US20090173494 System and method to interpret distributed temperature sensor data and to determine a flow rate in a well |
| 07/09/2009 | US20090173493 Interface and method for transmitting information to and from a downhole tool |
| 07/09/2009 | US20090173150 Early Kick Detection in an Oil and Gas Well |
| 07/09/2009 | CA2710621A1 Borehole imaging and orientation of downhole tools |
| 07/09/2009 | CA2709698A1 Purging of fiber optic conduits in subterranean wells |
| 07/09/2009 | CA2709074A1 Telescopic joint mini control panel |
| 07/09/2009 | CA2702968A1 Integrated quill position and toolface orientation display |
| 07/08/2009 | EP1792052A4 Integrated magnetic ranging tool |
| 07/08/2009 | CN201269097Y Mechanical vibration damping protector for pressure meter |
| 07/08/2009 | CN201269096Y Down-hole electric generating apparatus |
| 07/08/2009 | CN201269095Y Feed circuit based on single-conductor cable logging instrument |