| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 07/03/2008 | DE102007034589A1 Drahtlose Telemetrie zwischen Bohrlochwerkzeugen Wireless telemetry between downhole tools |
| 07/03/2008 | CA2572755A1 Wire-line connection system |
| 07/02/2008 | CN201080823Y Pressure thermometre bearing cartridge |
| 07/02/2008 | CN201080822Y Horizontal well logging cable wellhead protecting device |
| 07/02/2008 | CN201080821Y Flexible rotating combined instrument |
| 07/02/2008 | CN201080804Y Multifunctional wellhead pressure test packer |
| 07/02/2008 | CN101213489A Semiconductor device and its manufacturing method, semiconductor manufacturing mask, and optical proximity processing method |
| 07/02/2008 | CN101210490A Wireless telemetry between wellbore tools |
| 07/02/2008 | CN101210489A Method and apparatus for locating faults in wired drill pipe |
| 07/01/2008 | US7394064 Measuring the weight on a drill bit during drilling operations using coherent radiation |
| 07/01/2008 | US7392861 Stabilizer for a rod, particularly a string of drilling rods |
| 07/01/2008 | US7392858 Remote control for a drilling machine |
| 07/01/2008 | US7392697 Apparatus for downhole fluids analysis utilizing micro electro mechanical system (MEMS) or other sensors |
| 06/28/2008 | CA2594598A1 Wireless telemetry between wellbore tools |
| 06/28/2008 | CA2593943A1 Integrated electrode resistivity and em telemetry tool |
| 06/26/2008 | WO2008076809A1 Methods and apparatus for harvesting potential energy downhole |
| 06/26/2008 | WO2008076625A2 System for steering a drill string |
| 06/26/2008 | WO2008075969A1 An apparatus for leakage testing and/or pressure testing of a portion of a pipe and also a method for use of same |
| 06/26/2008 | WO2008075238A1 System and method for sensing a parameter in a wellbore |
| 06/26/2008 | WO2008033226A3 Method for using logging device with down-hole transceiver for operation in extreme temperatures |
| 06/26/2008 | US20080149331 Method for Determining the Size of Tubular Pipe to be Inserted in a Borehole |
| 06/26/2008 | US20080149330 Sonde |
| 06/26/2008 | US20080148838 Single Phase Fluid Sampling Apparatus and Method for Use of Same |
| 06/26/2008 | CA2673088A1 An apparatus for leakage testing and/or pressure testing of a portion of a pipe and also a method for use of same |
| 06/26/2008 | CA2672079A1 Methods and apparatus for harvesting potential energy downhole |
| 06/26/2008 | CA2671947A1 System and method for sensing a parameter in a wellbore |
| 06/26/2008 | CA2671435A1 Wellbore power and/or data transmission devices and methods |
| 06/25/2008 | EP1936113A1 2d Well Testing with Smart Plug Sensors |
| 06/25/2008 | EP1936112A2 Method, system and tool for reservoir evaluation and well testing during drilling operations |
| 06/25/2008 | EP1936111A1 Method for determining the sizeof tubular pipe to be inserted in a borehole |
| 06/25/2008 | EP1644612B1 Determination of the orientation and/or position of the downhole device |
| 06/25/2008 | CN201078225Y Three axis magnetic resistance exploration tube for well drilling |
| 06/25/2008 | CN201078211Y New type testing bulkhead |
| 06/25/2008 | CN101205806A Down-hole instrument high-speed single-core cable transmission device |
| 06/24/2008 | US7392137 Determination of formation anistrophy, dip and azimuth |
| 06/24/2008 | US7389828 Apparatus and method for mechanical caliper measurements during drilling and logging-while-drilling operations |
| 06/24/2008 | US7389815 Methods for reverse-circulation cementing in subterranean formations |
| 06/24/2008 | US7389685 Downhole pressure transmitter |
| 06/24/2008 | US7389684 Gas lift flow surveillance device |
| 06/21/2008 | CA2612357A1 2d well testing with smart plug sensors |
| 06/21/2008 | CA2571966A1 Shaft encoder with anti-backlash gears |
| 06/19/2008 | WO2008010757A9 Arrangement and method for determining the position of a rock reinforcing bolt |
| 06/19/2008 | WO2007098312A3 Single point and fiber optic temperature measurement for correction of a gas column weight in a well |
| 06/19/2008 | US20080142264 System for steering a drill string |
| 06/19/2008 | US20080142226 Liquid carbon dioxide cleaning of wellbores and near-wellbore areas using high precision stimulation |
| 06/19/2008 | US20080142215 Methods and apparatus for harvesting potential energy downhole |
| 06/19/2008 | US20080142213 Radial expansion of a wellbore casing against a formation |
| 06/19/2008 | US20080142212 System and method for sensing a parameter in a wellbore |
| 06/19/2008 | US20080141767 Enhanced downhole fluid analysis |
| 06/19/2008 | DE102007048978A1 Method for measuring function parameters of geothermal heat utilization arrangement, involves determining time and location dependent thermal coupling between geothermal heat utilization arrangement and surrounding |
| 06/18/2008 | EP1933171A2 Magnetometers for measurement-while-drilling applications |
| 06/18/2008 | CN201075864Y Thick film circuit for remote indicating instrument analogue signal gathering |
| 06/18/2008 | CN201075131Y Debris fluorescence logging instrument using LED as light source |
| 06/18/2008 | CN201074513Y Pressure sensor |
| 06/18/2008 | CN201074512Y Gas flushing device for testing liquid level of portable oil well |
| 06/18/2008 | CN201074511Y System for testing optical fiber flux of permanence hyperthermia oil gas commercial well |
| 06/18/2008 | CN201074494Y Blanking plug for testing pressure of well head |
| 06/18/2008 | CN101203659A Downhole position locating device with fluid regulating feature |
| 06/18/2008 | CN101203658A A method and apparatus for reservoir characterization using photoacoustic spectroscopy |
| 06/18/2008 | CN101201616A System and method for automating or metering fluid recovered at a well |
| 06/18/2008 | CN101201002A Long-range single-cord well logging bus control system |
| 06/18/2008 | CN100395428C Cracking four-linking technology |
| 06/17/2008 | US7389185 Methods and systems for determining reservoir properties of subterranean formations with pre-existing fractures |
| 06/17/2008 | US7389183 Method for determining a stuck point for pipe, and free point logging tool |
| 06/17/2008 | US7388380 While-drilling apparatus for measuring streaming potentials and determining earth formation characteristics and other useful information |
| 06/17/2008 | US7387160 Use of sensors with well test equipment |
| 06/17/2008 | US7387159 Blending system for solid/fluids mixtures |
| 06/17/2008 | US7387021 Method and apparatus for reservoir characterization using photoacoustic spectroscopy |
| 06/17/2008 | US7386942 Method and apparatus for mapping the trajectory in the subsurface of a borehole |
| 06/17/2008 | CA2491192C Method for determining pressure of earth formations |
| 06/17/2008 | CA2482931C Method for improving drilling depth measurements |
| 06/17/2008 | CA2482922C Method and apparatus for determining drill string movement mode |
| 06/17/2008 | CA2482184C Apparatus and method of detecting interfaces between well fluids and for detecting the launch of a device in oilfield applications |
| 06/17/2008 | CA2450337C Providing electrical isolation for a downhole device |
| 06/17/2008 | CA2381114C Steerable transceiver unit for downhole data acquisition in a formation |
| 06/17/2008 | CA2259719C Fiber optic well logging cable |
| 06/15/2008 | CA2615144A1 Spectrograph tool |
| 06/14/2008 | CA2593935A1 Determining properties of earth formations using the electromagnetic coupling tensor |
| 06/12/2008 | WO2008070754A1 Apparatus and method for clock shift correction for measurement-while-drilling measurements |
| 06/12/2008 | WO2008070509A2 Downhole power source |
| 06/12/2008 | WO2008069695A2 Method of measuring of production rate for a well cluster |
| 06/12/2008 | WO2008069674A1 A method of downhole, non-isotopic generation of ionised radiation and an apparatus for use when practising the method |
| 06/12/2008 | WO2008068561A1 Methods and apparatus for navigating a tool downhole |
| 06/12/2008 | US20080137711 Fiber Optic Sensing Systems and Methods |
| 06/12/2008 | US20080137481 Receiver for an acoustic telemetry system |
| 06/12/2008 | US20080135293 Methods and apparatus for navigating a tool downhole |
| 06/12/2008 | US20080135240 Inflatable Packer Assembly |
| 06/12/2008 | US20080135237 Monitoring injected nonhydrocarbon and nonaqueous fluids through downhole fluid analysis |
| 06/12/2008 | US20080134775 Apparatus and methods for obtaining measurements below bottom sealing elements of a straddle tool |
| 06/12/2008 | US20080134774 Wellbore production tool and method |
| 06/12/2008 | CA2671822A1 Automated mse-based drilling apparatus and methods |
| 06/12/2008 | CA2671170A1 Methods and apparatus for navigating a tool downhole |
| 06/12/2008 | CA2668566A1 A method for downhole, non-isotopic generation of ioni sed radiation and an apparatus for use when practising the method |
| 06/12/2008 | CA2610907A1 Apparatus and methods for obtaining measurements below bottom sealing elements of a straddle tool |
| 06/11/2008 | EP1930542A2 Method and apparatus for acoustic data transmission in a subterranean well |
| 06/11/2008 | EP1929125A1 System for tracking and maintaining an on-grade horizontal borehole |
| 06/11/2008 | CN201071715Y Testing device for directly reading down-hole data across test valve |
| 06/11/2008 | CN201071714Y Wireless collecting and monitoring apparatus for oil gas well ground test data |
| 06/11/2008 | CN201071713Y Down-hole vertical poly-magnetic probe |
| 06/11/2008 | CN201071694Y Anti-releasing and anti-abrasion lead stamp used for oil field horizontal well horizontal section workover |