| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 07/04/2006 | US7069775 Borehole caliper tool using ultrasonic transducer |
| 07/04/2006 | CA2255474C Tool orientation with electronic probes in a magnetic interference environment |
| 06/29/2006 | WO2006069060A1 Two sensor impedance estimation for uplink telemetry signals |
| 06/29/2006 | WO2006067578A1 Methods and apparatus for single fiber optical telemetry |
| 06/29/2006 | WO2006067575A1 Improved anchor arm for seismic logging tool |
| 06/29/2006 | WO2006067432A1 Downhole communication method and system |
| 06/29/2006 | WO2004072586A3 Measuring fluid volumes in a container using pressure |
| 06/29/2006 | US20060142955 In situ optical computation fluid analysis system and method |
| 06/29/2006 | US20060137441 Internal riser inspection device and methods of using same |
| 06/29/2006 | US20060137196 Pitch sensing in drilling machines |
| 06/29/2006 | CA2591999A1 Downhole communication method and system |
| 06/29/2006 | CA2591576A1 Methods and apparatus for single fiber optical telemetry |
| 06/29/2006 | CA2591137A1 Improved anchor arm for seismic logging tool |
| 06/28/2006 | EP1673517A1 Atomic clock for downhole applications |
| 06/28/2006 | CN2791247Y Drilling-tool flaw-detector head suspension device |
| 06/28/2006 | CN2791246Y Gas-removing degassing apparatus for well-drilling apparatus |
| 06/28/2006 | CN2791236Y Quick-action pressure-testing joint of internal jet-preventing tool |
| 06/28/2006 | CN1794013A High resolution ratio static natural potential well logging instrument and its measuring method |
| 06/28/2006 | CN1261671C Protector for preventing rod member from falling and one-way locking method |
| 06/27/2006 | US7068182 Method and apparatus for mud pulse telemetry |
| 06/27/2006 | US7066284 Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell |
| 06/27/2006 | US7066282 Apparatus and methods for measuring formation characteristics in presence of conductive and non-conductive muds |
| 06/27/2006 | US7066280 Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations |
| 06/27/2006 | US7066266 Method of treating oil and gas wells |
| 06/27/2006 | US7066257 In situ recovery from lean and rich zones in a hydrocarbon containing formation |
| 06/27/2006 | US7066256 Apparatus and method of detecting interfaces between well fluids |
| 06/27/2006 | US7066255 Protection against loss of downhole tools |
| 06/27/2006 | US7066019 Cavity stability prediction method for wellbores |
| 06/27/2006 | CA2397171C Self-calibrated ultrasonic method of in-situ measurement of borehole fluid acoustic properties |
| 06/27/2006 | CA2199755C Method and apparatus for eddy current suppression |
| 06/23/2006 | CA2646435A1 Optical inclination sensor |
| 06/22/2006 | WO2006065923A2 Centralizer-based survey and navigation device and method |
| 06/22/2006 | WO2006065745A1 A method and apparatus for demagnetizing a borehole |
| 06/22/2006 | WO2006065603A2 Method for estimating confined compressive strength for rock formations utilizing skempton theory |
| 06/22/2006 | WO2006065559A1 Heating and cooling electrical components in a downhole operation |
| 06/22/2006 | WO2006065483A1 Acoustic telemetry system using passband equalization |
| 06/22/2006 | WO2006063808A1 A magneto-optical sensor |
| 06/22/2006 | WO2006063432A1 Gyroscopically-oriented survey tool |
| 06/22/2006 | WO2006037079A9 Apparatus and method for wireline imaging in nonconductive muds |
| 06/22/2006 | US20060133205 Determination of the impedance of a material behind a casing combining two sets of ultrasonic measurements |
| 06/22/2006 | US20060133204 Method to measure and locate a fluid communication pathway in a material behind a casing |
| 06/22/2006 | US20060133203 Method and apparatus for acoustic detection of a fluid leak behind a casing of a borehole |
| 06/22/2006 | US20060132136 Bore location system |
| 06/22/2006 | US20060131074 Method for estimating confined compressive strength for rock formations utilizing skempton theory |
| 06/22/2006 | US20060131016 Apparatus and method for determining the dip of an underground formation in a cased or uncased borehole |
| 06/22/2006 | US20060131015 Anchor arm for seismic logging tool |
| 06/22/2006 | US20060131014 Borehole communication and measurement system |
| 06/22/2006 | US20060131013 Magnetization of target well casing strings tubulars for enhanced passive ranging |
| 06/22/2006 | US20060130573 Non-invasive measurement of fluid-pressure diffusivity using electro-osmosis |
| 06/22/2006 | CA2591691A1 Centralizer-based survey and navigation device and method |
| 06/22/2006 | CA2591058A1 Method for estimating confined compressive strength for rock formations utilizing skempton theory |
| 06/21/2006 | EP1672169A1 Method to measure and locate a fluid communication pathway in a material behind a casing |
| 06/21/2006 | EP1672168A1 Determination of the impedance of a material behind a casing combining two sets of ultrasonic measurements |
| 06/21/2006 | EP1552108B1 Method for interpreting data measured in a hydrocarbon well in production |
| 06/21/2006 | EP1514009A4 Mwd formation tester |
| 06/21/2006 | EP1514008A4 Acoustic doppler downhole fluid flow measurement |
| 06/21/2006 | EP1448867B1 Thermoacoustic electric power generation |
| 06/21/2006 | EP1053488B1 Multiple transducer mwd surface signal processing |
| 06/21/2006 | CN1791731A Systems and methods using a continuously variable transmission to control one or more system components |
| 06/21/2006 | CN1260459C Sand control data acquisition processing method, apparatus and system |
| 06/20/2006 | US7064677 Method of monitoring service operations of a service vehicle at a well site |
| 06/20/2006 | US7064676 Downhole data transmission system |
| 06/20/2006 | US7063174 Method for reservoir navigation using formation pressure testing measurement while drilling |
| 06/20/2006 | US7063148 Method and system for transmitting signals through a metal tubular |
| 06/20/2006 | US7063147 Method and apparatus and program storage device for front tracking in hydraulic fracturing simulators |
| 06/20/2006 | US7063146 System and method for processing signals in a well |
| 06/20/2006 | US7063145 Methods and systems for heating a hydrocarbon containing formation in situ with an opening contacting the earth's surface at two locations |
| 06/20/2006 | US7063143 Docking station assembly and methods for use in a wellbore |
| 06/20/2006 | US7063141 Apparatus for agitated fluid discharge |
| 06/20/2006 | US7062960 Blow out preventer testing apparatus |
| 06/20/2006 | US7062959 Method and apparatus for determining downhole pressures during a drilling operation |
| 06/20/2006 | US7062958 Receptacle for sampling downhole |
| 06/20/2006 | US7062957 Percolation test apparatus |
| 06/20/2006 | CA2727964A1 Magnetization of target well casing string tubulars for enhanced passive ranging |
| 06/20/2006 | CA2727885A1 Enhanced passive ranging methodology for well twinning |
| 06/20/2006 | CA2529539A1 Method to measure and locate a fluid communication pathway in a material behind a casing |
| 06/20/2006 | CA2529173A1 Determination of the impedance of a material behind a casing combining two sets of ultrasonic measurements |
| 06/20/2006 | CA2247490C A downhole drift indicator |
| 06/15/2006 | WO2006063094A1 In situ optical computation fluid analysis system and method |
| 06/15/2006 | WO2006062512A1 Deepwater seal test apparatus |
| 06/15/2006 | WO2006061694A1 Sonde deployment |
| 06/15/2006 | WO2006041308A3 System and method for wireless data transmission |
| 06/15/2006 | US20060124355 Establishing positions of locating field detectors and path mapping in underground boring tool applications |
| 06/15/2006 | US20060124354 Modular drilling apparatus with power and/or data transmission |
| 06/15/2006 | US20060124353 Pipe running tool having wireless telemetry |
| 06/15/2006 | US20060124299 Rupture disc monitoring system |
| 06/15/2006 | US20060124297 System and Method for Communicating Along a Wellbore |
| 06/15/2006 | US20060124291 Auto-extending/retracting electrically isolated conductors in a segmented drill string |
| 06/15/2006 | CA2587782A1 Sonde deployment |
| 06/14/2006 | EP1669769A1 A magneto-optical sensor |
| 06/14/2006 | EP1669541A1 Locating joins in coiled tubing operations |
| 06/14/2006 | EP1394356B1 Method for characterising parameters of wells, well bottom zone and formation, and device for carrying out said method |
| 06/14/2006 | EP1268977B1 Method for estimating the position of a drill |
| 06/14/2006 | CN2787829Y Positive mud pulse generator |
| 06/14/2006 | CN2787828Y Instrument for measuring horizontal drilling trajectory |
| 06/14/2006 | CN1786413A Method for porecasting water upwelling amount of mine well based on nerve network model |
| 06/14/2006 | CN1786412A Portable well logging/perforating ground system |
| 06/14/2006 | CN1259548C Composite annular all angles automatic continuous decline meter |
| 06/13/2006 | US7062420 Production optimization methodology for multilayer commingled reservoirs using commingled reservoir production performance data and production logging information |
| 06/13/2006 | US7062072 Methods of producing images of underground formations surrounding a borehole |