| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 12/06/2012 | WO2012167078A2 Apparatus and method for determining inclination and orientation of a downhole tool using pressure measurements |
| 12/06/2012 | WO2012166931A2 Method of incorporating remote communication with oilfield tubular handling apparatus |
| 12/06/2012 | WO2012166677A2 A method of conditioning a wall of a bore section |
| 12/06/2012 | WO2012166395A2 Low-frequency viscosity, density, and viscoelasticity sensor for downhole applications |
| 12/06/2012 | WO2012166353A1 Downhole acoustic emission formation sampling |
| 12/06/2012 | WO2012166137A1 Optimized pressure drilling with continuous tubing drill string |
| 12/06/2012 | WO2012163714A1 Injection system for an oil-delivery system |
| 12/06/2012 | WO2012163420A1 Determining the location of a material located behind an obstruction |
| 12/06/2012 | WO2012162804A1 Method for controlling fluid interface level in gravity drainage oil recovery processes |
| 12/06/2012 | WO2012128867A3 Apparatus and method for filtering data influenced by a downhole pump |
| 12/06/2012 | WO2012125369A3 Maximum depth of investigation of measurements in a formation |
| 12/06/2012 | WO2012106348A3 Method of minimizing wellbore instability |
| 12/06/2012 | WO2011123438A8 Method for maintaining wellbore pressure |
| 12/06/2012 | US20120308174 Well-bore sensing |
| 12/06/2012 | US20120306581 Quartz Pressure and Temperature Transducer Assembly With Dynamic Correction |
| 12/06/2012 | US20120305315 Oilfield Operation Using A Drill String |
| 12/06/2012 | US20120305313 Apparatus and Method for Determining Inclination and Orientation of a Downhole Tool Using Pressure Measurements |
| 12/06/2012 | US20120305244 Acoustic triggering devices for multiple fluid samplers and methods of making and using same |
| 12/06/2012 | US20120305243 Inflow control in a production casing |
| 12/06/2012 | US20120305241 Atomic battery powered downhole completions assembly |
| 12/06/2012 | US20120304757 Methods and apparatus to estimate fluid component volumes |
| 12/06/2012 | CA2837859A1 Optimized pressure drilling with continuous tubing drill string |
| 12/06/2012 | CA2837701A1 Downhole acoustic emission formation sampling |
| 12/06/2012 | CA2837493A1 Determining the location of a material located behind an obstruction |
| 12/06/2012 | CA2834808A1 Method for controlling fluid interface level in gravity drainage oil recovery processes |
| 12/05/2012 | EP2530239A1 Injection system for an oil conveying system |
| 12/05/2012 | EP2529080A2 Configuration of ordered multicomponent devices |
| 12/05/2012 | CN202585890U Electromagnetic isolation bearing connector |
| 12/05/2012 | CN202585762U Rotary type grounding electrode of electromagnetic wave measurement while drilling system and screwing tool thereof |
| 12/05/2012 | CN202578675U Signal transmission system based on power centre line of electric submersible pump |
| 12/05/2012 | CN202578674U Well-mouth anti-spurting testing device |
| 12/05/2012 | CN202578673U Hole diameter measurement device for measuring diameter of pile hole |
| 12/05/2012 | CN202578672U Well diameter measurement device for measuring diameter of pile hole |
| 12/05/2012 | CN202578671U Temperature sensor |
| 12/05/2012 | CN202578670U Optical fiber temperature sensor for petroleum engineering logging |
| 12/05/2012 | CN202578669U Sensing device for measuring apparent temperature in underground rescue capsule |
| 12/05/2012 | CN202578668U Downhole parameter direct reading and testing integrated machine for vertical well and horizontal well of oil field |
| 12/05/2012 | CN202578667U Well logging coupling detecting system |
| 12/05/2012 | CN202578666U Connecting structure for installation rod of drilling scientific-research instrument |
| 12/05/2012 | CN202578665U Distance-adjustable underground equipment connector suitable for drill collar connection |
| 12/05/2012 | CN202578664U Sand bed for simulating well wall of dry mineshaft |
| 12/05/2012 | CN202578663U Oilfield down-hole multi-parameter measurement system |
| 12/05/2012 | CN202578654U Standard perforator for oil-string casing detection |
| 12/05/2012 | CN202578634U Switching type rail sealing sliding sleeve |
| 12/05/2012 | CN202578615U Annulus pressure monitoring sealing device for geological drilling |
| 12/05/2012 | CN202575803U Electrically-driven logging truck |
| 12/05/2012 | CN102811499A Mine underground mobile communication system based on 3G (The 3rd Generation Telecommunication) |
| 12/05/2012 | CN102811147A Networked well logging system and communication method thereof |
| 12/05/2012 | CN102808815A Stable pressure maintaining hydraulic pump valve system |
| 12/05/2012 | CN102808615A Electronic circuit testing equipment for formation pressure tester while drilling |
| 12/05/2012 | CN102808614A Oil-gas migration physical simulation device and oil-gas migration experiment method |
| 12/05/2012 | CN102808613A Calibration method of magnetoresistive angle sensor of caliper logging unit |
| 12/05/2012 | CN102808612A Wake-up method of formation pressure testing while drilling |
| 12/05/2012 | CN102808611A Comprehensive testing device of drilling stratum pressure tester |
| 12/05/2012 | CN102808610A Real-time detection device and real-time detection method for coal mine downhole drilling depth |
| 12/05/2012 | CN102808609A U-shaped tubular single well producing rate metering device |
| 12/05/2012 | CN102808608A Drilling-logging integrated comprehensive instrument system |
| 12/05/2012 | CN102808607A Plunger device for gas well online measurement and plunger type drainage gas recovery system |
| 12/05/2012 | CN102808589A Motor-driven underground tractor for coiled tubing |
| 12/05/2012 | CN102808581A Guide device for downing casing pipe into herringbone well |
| 12/05/2012 | CN102808580A Laser directional drilling tool for coal-bed-methane level development hole and drilling method using same |
| 12/05/2012 | CN102536202B Method for manufacturing test piece for testing gas storage well completion sleeve-cement ring bonding strength |
| 12/05/2012 | CN101864912B Roller type water injection well centering device |
| 12/05/2012 | CN101725339B Method for aiming and directionally marking central lines through visual inspection |
| 12/05/2012 | CN101684729B Coal-seam gas pressure test system |
| 12/05/2012 | CN101421483B Electromagnetically determining the relative location of a drill bit using a solenoid source installed on a steel casing |
| 12/05/2012 | CN101405475B Acoustic telemetry |
| 12/04/2012 | US8326540 Method and apparatus for fluid migration profiling |
| 12/04/2012 | US8326538 Mobile wellsite monitoring |
| 12/04/2012 | US8323921 Method and apparatus for environmental monitoring and bioprospecting |
| 12/04/2012 | US8322462 Proximity detection system for deep wells |
| 12/04/2012 | US8322461 Drilling apparatus and method |
| 12/04/2012 | US8322445 Well jet device |
| 12/04/2012 | US8322433 Wired slip joint |
| 12/04/2012 | US8322428 Casing hanger nesting indicator |
| 12/04/2012 | US8322427 Control system |
| 12/04/2012 | US8322415 Instrumented swellable element |
| 12/04/2012 | US8322414 Surface detection of failed open-hole packers using tubing with external tracer coatings |
| 12/04/2012 | CA2692562C Well jet device and the operation method thereof |
| 12/04/2012 | CA2653426C A method and apparatus to turn on an electric device inside a sealed pressure housing |
| 12/04/2012 | CA2603536C System and methods of communicating over noisy communication channels |
| 12/04/2012 | CA2579982C Anisotropy measurement while drilling |
| 12/04/2012 | CA2532181C Apparatus and method for measuring concentrations of scale-forming ions |
| 11/29/2012 | WO2012162478A2 Environmental corrections in nuclear spectroscopy using variable shape standard |
| 11/29/2012 | WO2012162473A2 Environmental corrections in nuclear spectroscopy using variable element ratio |
| 11/29/2012 | WO2012162212A2 Detection of gas influx into a wellbore |
| 11/29/2012 | WO2012161961A2 Verification of swelling in a well |
| 11/29/2012 | WO2012161854A2 Safety system for autonomous downhole tool |
| 11/29/2012 | WO2012160429A1 Device, arrangement and method for the measurement of deformation of the ground under the earth surface |
| 11/29/2012 | WO2012115997A3 Apparatus and method for increasing the ultimate recovery of natural gas contained in shale and other tight gas reservoirs |
| 11/29/2012 | US20120303326 Reservoir Evaluation System |
| 11/29/2012 | US20120303281 Enhanced dynamic well model for reservoir pressure determination |
| 11/29/2012 | US20120303279 Inclinometer to Determine Orientation of Gauge Installed Off Center Axis of a Tubing String |
| 11/29/2012 | US20120300200 Optical measurement device |
| 11/29/2012 | US20120298421 Detection of gas influx into a wellbore |
| 11/29/2012 | US20120298420 Methods For Characterization Of Formations, Navigating Drill Paths, And Placing Wells In Earth Boreholes |
| 11/29/2012 | US20120298355 Logging While Pulling |
| 11/29/2012 | US20120297868 Portable gas monitor |
| 11/29/2012 | US20120297652 Device and method for attaching an id-marker to a production pipe |
| 11/29/2012 | CA2838558A1 Power system for high temperature applications with rechargeable energy storage |