| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 04/13/2011 | EP2309096A1 System for inspecting a casing |
| 04/13/2011 | EP2307668A1 A bottom-hole assembly, and a method and system for transmitting data from a bottom-hole assembly |
| 04/13/2011 | EP2307667A1 Acoustically measuring annulus probe depth |
| 04/13/2011 | EP2307666A2 Method of manufacture and the use of a functional proppant for determination of subterranean fracture geometries |
| 04/13/2011 | EP2307469A2 Cationic fluorinated polymer compositions and methods for treating hydrocarbon-bearing formations using the same |
| 04/13/2011 | CN201794584U Three-combination logging instrument |
| 04/13/2011 | CN201794583U Well completion evaluation experiment device for coal bed methane cave |
| 04/13/2011 | CN201794581U Slurry pulse generator |
| 04/13/2011 | CN201794580U High-temperature high-pressure plugging simulation testing device for drilling fluid |
| 04/13/2011 | CN201794579U Packaging structure of quasi-distributed fiber grating temperature sensor |
| 04/13/2011 | CN201794578U Inclinometer system with Bluetooth communication function |
| 04/13/2011 | CN201794577U Electronic measuring and control rotator of sucker rod |
| 04/13/2011 | CN201794576U Remote control type oil well metering apparatus |
| 04/13/2011 | CN201794553U Underground switch well valve for coal bed gas well testing device |
| 04/13/2011 | CN201794550U Blowout prevention plug for separate layer testing of well |
| 04/13/2011 | CN1869399B Shock-absorbing connection |
| 04/13/2011 | CN102011577A Intelligent testing and regulating controller |
| 04/13/2011 | CN102011576A Method for hierarchically diagnosing fault of rod-comprising oil pumping system based on indicator diagram |
| 04/13/2011 | CN102011575A Method for optimizing structure of annular water retention rate logging sensor array |
| 04/13/2011 | CN102011566A Leakage risk early warning method for offshore oil and gas production device |
| 04/13/2011 | CN101650750B Rapid and intuitive interpretive system and method for petroleum well logging data |
| 04/13/2011 | CN101025084B Method for predicting formation pore pressure under drill-bit while drilling |
| 04/12/2011 | US7921916 Communicating measurement data from a well |
| 04/12/2011 | US7921913 Vacuum insulated dewar flask |
| 04/12/2011 | US7921910 Tagged propping agents and related methods |
| 04/12/2011 | US7921909 Method for breaking fracture fluids |
| 04/12/2011 | US7921714 Annular region evaluation in sequestration wells |
| 04/12/2011 | US7921573 Monitoring verticality of a sinking caisson |
| 04/12/2011 | CA2540175C Activity data capture system for a well service vehicle |
| 04/12/2011 | CA2463969C Gel release device |
| 04/08/2011 | CA2715881A1 Steerable magnetic dipole antenna for measurement-while-drilling applications |
| 04/07/2011 | WO2011041794A1 Method and apparatus for differential pressure measurement |
| 04/07/2011 | WO2011041390A2 Optical coiled tubing log assembly |
| 04/07/2011 | WO2011041347A2 Apparatus and method for downhole electromagnetic measurement while drilling |
| 04/07/2011 | WO2011041248A2 Electromagnetic logging between a cased borehole and surface |
| 04/07/2011 | WO2011038866A2 Boring element of a ground boring device |
| 04/07/2011 | WO2011038862A1 Equipment and methods for deploying line in a wellbore |
| 04/07/2011 | WO2009085502A3 Determining drillstring neutral point based on hydraulic factor |
| 04/07/2011 | WO2009077867A3 Technique and apparatus to perform a leak off test in a well |
| 04/07/2011 | US20110079432 Method and device for core drilling |
| 04/07/2011 | US20110079431 System and method for densely packing wells using magnetic ranging while drilling |
| 04/07/2011 | US20110079387 Method of Providing a Flow Control Device That Substantially Reduces Fluid Flow Between a Formation and a Wellbore When a Selected Property of the Fluid is in a Selected Range |
| 04/07/2011 | US20110079386 System and Method for Downhole Communication |
| 04/07/2011 | DE102009043716A1 Bohrelement einer Erdbohrvorrichtung Drilling element of a boring apparatus |
| 04/07/2011 | CA2775754A1 Optical coiled tubing log assembly |
| 04/07/2011 | CA2775349A1 Equipment and methods for deploying line in a wellbore |
| 04/06/2011 | EP2304175A2 Tool and method for evaluating fluid dynamic properties of a cement annulus surrounding a casing |
| 04/06/2011 | EP2304174A1 Downhole measurement of formation characteristics while drilling |
| 04/06/2011 | EP2304173A1 Measurement of formation parameters using rotating directional em antenna |
| 04/06/2011 | EP2304172A2 System and method for automating exploration of production of subterranean resources |
| 04/06/2011 | EP1583962B1 Methods and apparatus for the measurement of hydrogen sulphide and thiols in fluids |
| 04/06/2011 | CN201786354U Transmitting probe in acoustic logging |
| 04/06/2011 | CN201786353U String testing device |
| 04/06/2011 | CN201786352U Drop-proof device for oil well logger |
| 04/06/2011 | CN201786351U Real-time detecting device for working conditions of oil extractor |
| 04/06/2011 | CN201786350U Natural gas well mouth flow measurement system |
| 04/06/2011 | CN201786349U High-frequency signal sensing device for monitoring sand production in oil and gas wells |
| 04/06/2011 | CN102003175A Method for forecasting water inflow of railway karst tunnel water filling cavity through dewatering test method |
| 04/06/2011 | CN102003174A Simulated experiment device of three-dimension radial flow sieve tube |
| 04/06/2011 | CN102003173A System and method for automatically measuring and recording gas pressure during coal seam hole sealing |
| 04/06/2011 | CN102003172A Logging depth correction computation method in logging system |
| 04/06/2011 | CN102003171A Calibrating device of three-dimensional induction logger |
| 04/06/2011 | CN102003170A Calculating method for SAGD (Steam-Assisted Gravity Drainage) double-horizontal well drilling electromagnetic distance measurement guide |
| 04/06/2011 | CN101644596B Liquid level measuring meter |
| 04/06/2011 | CN101446552B Determining fluid properties from fluid analyzer |
| 04/05/2011 | US7918275 Water sensitive adaptive inflow control using couette flow to actuate a valve |
| 04/05/2011 | CA2627056C Electromagnetically determining the relative location of a drill bit using a solenoid source installed on a steel casing |
| 04/05/2011 | CA2610957C Method and apparatus for collecting drill bit performance data |
| 04/05/2011 | CA2585000C Telemetry transmitter optimization via inferred measured depth |
| 04/05/2011 | CA2512641C Apparatus and methods for drilling a wellbore using casing |
| 04/05/2011 | CA2447784C Conductive fluid flow logging tool |
| 04/05/2011 | CA2407541C Calculating directional drilling tool face offsets |
| 04/05/2011 | CA2396086C Method and device for the measurement of the drift of a borehole |
| 03/31/2011 | WO2011038250A2 Apparatus and method for predicting vertical stress fields |
| 03/31/2011 | WO2011038170A2 Downhole optical imaging tools and methods |
| 03/31/2011 | WO2011037927A2 System and method for monitoring and controlling wellbore parameters |
| 03/31/2011 | WO2011037925A2 Method for controlling fluid production from a wellbore by using a script |
| 03/31/2011 | WO2011037595A2 Method and apparatus for determining locations of multiple casings within a wellbore conductor |
| 03/31/2011 | WO2011037588A1 Pipe conveyed extendable well logging tool |
| 03/31/2011 | WO2011036471A2 A method and apparatus for communicating with a device located in a borehole |
| 03/31/2011 | WO2011035437A1 Seismic source which incorporates earth coupling as part of the transmitter resonance |
| 03/31/2011 | WO2010148286A3 Apparatus and method for determining corrected weight-n-bit |
| 03/31/2011 | WO2010140032A3 Use of encapsulated tracers |
| 03/31/2011 | WO2010135618A3 Optimization of neutron-gamma tools for inelastic gamma-ray logging |
| 03/31/2011 | WO2010135591A3 Downhole sensor tool for nuclear measurements |
| 03/31/2011 | WO2010135282A3 High speed telemetry full-duplex pre-equalized ofdm over wireline for downhole communication |
| 03/31/2011 | WO2010132432A3 Apparatus and method for multi-sensor estimation of a property of an earth formation |
| 03/31/2011 | WO2010129603A3 Multi-phase fluid measurement apparatus and method |
| 03/31/2011 | WO2010129280A3 Petrophysics-guided processing of lwd acoustic data |
| 03/31/2011 | WO2010129173A3 A method and apparatus for nmr measurements in small boreholes and in underbalanced drilling |
| 03/31/2011 | WO2010116316A3 Method and system for completing a well |
| 03/31/2011 | WO2010111359A3 Apparatus and method for removing anisotropy effect from directional resistivity measurements |
| 03/31/2011 | US20110073368 Reduction of Tool Mode and Drilling Noise In Acoustic LWD |
| 03/31/2011 | US20110073303 System and method for communicating between a drill string and a logging instrument |
| 03/31/2011 | US20110073302 Method of controlling growth and heat loss of an in situ gravity draining chamber formed with a condensing solvent process |
| 03/31/2011 | CA2775022A1 A method and apparatus for communicating with a device located in a borehole |
| 03/31/2011 | CA2773648A1 Method and apparatus for determining locations of multiple casings within a wellbore conductor |
| 03/30/2011 | EP2302479A2 Condition monitoring of an underwater facility |
| 03/30/2011 | EP2300684A1 Fiber reinforced pressure compensator diaphragm |
| 03/30/2011 | EP2205813B1 Method and device for testing the coating of a pipeline while laying the pipeline in a liquid-filled borehole |