| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 04/16/2009 | US20090095469 Coarse Wellsite Analysis for Field Development Planning |
| 04/16/2009 | US20090095468 Method and apparatus for determining a parameter at an inflow control device in a well |
| 04/16/2009 | CA2701885A1 Bore-hole jet device for formation hydraulic fracturing and horizontal well examination and a method for the operation thereof |
| 04/15/2009 | EP1787005B1 Magnetic assemblies for deposit prevention |
| 04/15/2009 | CN201221355Y Continuous wave pressure pulse generator |
| 04/15/2009 | CN201221354Y Near-bit geology guide probe system |
| 04/15/2009 | CN201221353Y Downhole wireless electromagnetic transmitting apparatus |
| 04/15/2009 | CN201221352Y Induction type downhole data connecting apparatus |
| 04/15/2009 | CN201221351Y Pipe rod external diameter detection device |
| 04/15/2009 | CN201221350Y Oil well suppressing test recorder using GPS positioning technology |
| 04/15/2009 | CN201221349Y Multi-layer oriented perforating interlayer spacing hole directional measuring apparatus |
| 04/15/2009 | CN201221348Y Oil conduit electronic positioner des-hanging apparatus |
| 04/15/2009 | CN201221347Y High-frequency electromagnetic wave logger receiving circuit electric structure |
| 04/15/2009 | CN201221346Y High-frequency electromagnetic wave logger coil array structure |
| 04/15/2009 | CN201221339Y Metering control valve and oil well quality on-line metering device using the same |
| 04/15/2009 | CN101410728A Method and apparatus for sensing a borehole characteristic |
| 04/15/2009 | CN101408104A High fidelity simulating stratum well-drilling leakage-plugging evaluation experimental system |
| 04/15/2009 | CN101408103A Method and apparatus for monitoring states of oil extraction and oil transportation of oil field |
| 04/15/2009 | CN101408102A Total hydrocarbon intelligent logging system |
| 04/15/2009 | CN101408101A Wellbore telemetry system and method |
| 04/15/2009 | CN101408095A Electrically activating a jarring tool |
| 04/14/2009 | US7519508 Method and system for setting and analyzing tubing target pressures for tongs |
| 04/14/2009 | US7519475 Method for determining block properties of a service rig by evaluating rig data |
| 04/14/2009 | US7518950 Method and apparatus for downlink communication |
| 04/14/2009 | US7518527 Extended range emf antenna |
| 04/14/2009 | US7516802 Assembly and method for determining thermal properties of a formation and forming a liner |
| 04/14/2009 | US7516793 Methods and systems for fracturing subterranean wells |
| 04/14/2009 | US7516792 Remote intervention logic valving method and apparatus |
| 04/14/2009 | US7516788 Methods of marking a zone of a wellbore for localizing the source of produced particulate |
| 04/14/2009 | US7516786 Wellhead and control stack pressure test plug tool |
| 04/14/2009 | CA2626596C Method and apparatus for fluid migration profiling |
| 04/14/2009 | CA2556107C A downhole positioning system |
| 04/14/2009 | CA2531743C Electrical imaging in conductive and non-conductive mud |
| 04/14/2009 | CA2456637C Directional signal and noise sensors for borehole electromagnetic telemetry system |
| 04/14/2009 | CA2373576C System and method for electronic data delivery |
| 04/11/2009 | CA2639847A1 Systems and methods for guiding the drilling of a horizontal well |
| 04/10/2009 | CA2639449A1 Optical fibre splice protector |
| 04/09/2009 | WO2009045870A2 System and method for performing oilfield operations |
| 04/09/2009 | WO2009043589A2 Method and device for in situ determination of the operating states of driven machines |
| 04/09/2009 | WO2006065923A3 Centralizer-based survey and navigation device and method |
| 04/09/2009 | US20090090556 Methods and Systems to Predict Rotary Drill Bit Walk and to Design Rotary Drill Bits and Other Downhole Tools |
| 04/09/2009 | US20090090505 Method and tool for determination of fracture geometry in subterranean formations based on in-situ neutron activation analysis |
| 04/09/2009 | US20090090504 Determining Fluid Rheological Properties |
| 04/09/2009 | US20090090176 Electrochemical sensor |
| 04/09/2009 | DE102007047500A1 Verfahren und Vorrichtung zur In-Situ-Bestimmung der Betriebszustände von Arbeitsmaschinen Method and apparatus for in-situ determination of the operating states of work machine |
| 04/08/2009 | EP2045440A2 System and method for measuring depth and velocity of instrumentation within a wellbore using a bendable tool |
| 04/08/2009 | EP1825103B1 Sonde deployment |
| 04/08/2009 | CN201218911Y Coordination apparatus for oil well liquid supply and drain |
| 04/08/2009 | CN201218760Y Pressure type load sensor for micro-deformation of oil pumping machine balance beam |
| 04/08/2009 | CN201218759Y Embedded load sensor for rope frame of oil pumping machine |
| 04/08/2009 | CN201218096Y Multifunctional installation apparatus for oil extraction gas well mouth oil jacket pressure cap |
| 04/08/2009 | CN201218095Y Fast pressure tester |
| 04/08/2009 | CN201218094Y Crude oil floating barrel weighing and metering device |
| 04/08/2009 | CN201218080Y Gas well dividing test novel technique column |
| 04/08/2009 | CN101405475A Acoustic telemetry |
| 04/08/2009 | CN101405474A Method and apparatus for locating a plug within the well |
| 04/08/2009 | CN101403298A Double-driving combination logging probe |
| 04/08/2009 | CN101403297A Direct-reading type oil well delamination pressure gauge |
| 04/08/2009 | CN101403296A Delamination pressure testing method for oil well without stop production |
| 04/08/2009 | CN101403295A Water-plugging direct-reading delamination pressure testing working barrel |
| 04/08/2009 | CN101403294A Stratum pressure detection method for interchange of PDC drilling bit and roller bit |
| 04/08/2009 | CN101403293A Column type down-hole shut-in well delamination pressure test technique and column suitable for oil well |
| 04/08/2009 | CN101403292A Gas lift method production fluid section plane test technique of mechanical mining horizontal well |
| 04/08/2009 | CN101403291A Preset production fluid section plane test method of mechanical mining horizontal well and special shaft mouth test apparatus |
| 04/08/2009 | CN101403284A Down-hole tool and controllable segment sealing device for down-hole working barrel seal |
| 04/07/2009 | US7513752 Beam pump dynamic load monitoring and methods |
| 04/07/2009 | US7513305 Apparatus and methods for operating a tool in a wellbore |
| 04/07/2009 | US7513147 Piezocomposite transducer for a downhole measurement tool |
| 04/07/2009 | CA2546531C Method and system for wellbore communication |
| 04/07/2009 | CA2529741C Formation resistivity measurement sensor contained onboard a drill bit (resistivity in bit) |
| 04/07/2009 | CA2473854C Device for characterizing the flow of a multiphase fluid in a tubing |
| 04/07/2009 | CA2410398C Tracer release method for monitoring fluid flow in a well |
| 04/07/2009 | CA2407236C Borehole imaging |
| 04/07/2009 | CA2383370C Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
| 04/02/2009 | WO2009042781A2 Apparatus and methods for continuous tomography of cores |
| 04/02/2009 | WO2009042774A2 Apparatus and methods for continuous coring |
| 04/02/2009 | WO2009042674A1 A system and method for downhole optical analysis |
| 04/02/2009 | WO2009042319A1 Method for managing hydrates in subsea production line |
| 04/02/2009 | WO2009040510A2 Down-hole wireless communication system |
| 04/02/2009 | WO2009023852A3 Apparatus and methods for pulse testing a formation |
| 04/02/2009 | WO2008100362A3 Tractor communication/control and select fire perforating switch |
| 04/02/2009 | WO2005062830A3 System, method and apparatus for petrophysical and geophysical measurements at the drilling bit |
| 04/02/2009 | US20090087912 Tagged particles for downhole application |
| 04/02/2009 | US20090085767 Microwave Linked Laser Control System and Apparatus for Drilling and Boring Operations |
| 04/02/2009 | US20090085568 Locator Using Two Horizontally Displaced Measrement Points |
| 04/02/2009 | US20090084546 System and method for measuring depth and velocity of instrumentation within a wellbore using a bendable tool |
| 04/02/2009 | US20090084544 Method and system for interpreting swabbing tests using nonlinear regression |
| 04/02/2009 | US20090084543 Logging while producing apparatus and method |
| 04/02/2009 | US20090084542 Wellbore power and/or data transmission devices and methods |
| 04/02/2009 | US20090084536 System and Method for Downhole Orientation Measurement |
| 04/02/2009 | US20090084175 Spectroscopic ph measurement using optimized mixtures of reagents to extend measurement range |
| 04/02/2009 | CA2700361A1 Method for managing hydrates in a subsea production line |
| 04/02/2009 | CA2640079A1 System and method for measuring depth and velocity of instrumentation within a wellbore using a bendable tool |
| 04/01/2009 | EP2042683A1 A logging while producing apparatus and method |
| 04/01/2009 | EP2041395A1 Arrangement and method for determining the position of a rock reinforcing bolt |
| 04/01/2009 | EP1305547B1 Data transmission system for a string of downhole components |
| 04/01/2009 | CN201215011Y Damping oil conduit drift diameter gauge |
| 04/01/2009 | CN201215010Y Shock-absorber of liquid lacune flowing damping action while drilling |
| 04/01/2009 | CN201215009Y Double detection probe metering and adjusting apparatus |
| 04/01/2009 | CN201215006Y Single layer shunt detection electrodynamic water distribution detecting and adjusting instrument |