| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 07/11/2013 | WO2013103766A2 Wireless drill string disconnect |
| 07/11/2013 | WO2013103706A1 Directional drilling target steering apparatus and method |
| 07/11/2013 | WO2013102761A2 Wireless acoustic communications method and apparatus |
| 07/11/2013 | WO2013102252A1 Method and system for determining relative depth of an acoustic event within a wellbore |
| 07/11/2013 | WO2013102237A2 Navigation device and method for surveying and directing a borehole under drilling conditions |
| 07/11/2013 | WO2013039771A3 Systems and methods for reservoir production management |
| 07/11/2013 | WO2013003109A3 Electromagnetically heated thermal flowmeter for wellbore fluids |
| 07/11/2013 | WO2012072981A3 Fracture characterisation |
| 07/11/2013 | US20130176137 Horizontal directional drilling area network and methods |
| 07/11/2013 | US20130175417 Clamp |
| 07/11/2013 | US20130175094 Safety Mechanism For A Well, A Well Comprising The Safety Mechanism, And Related Methods |
| 07/11/2013 | US20130175024 Wireless Tag Tracer Method and Apparatus |
| 07/10/2013 | EP2612179A2 A resonance method for measuring the electroacoustic constant and permeability of rock formations |
| 07/10/2013 | EP2612178A1 Detecting and correcting unintended fluid flow between subterranean zones |
| 07/10/2013 | EP2612140A1 Integrated acoustic phase separator and multiphase fluid composition monitoring apparatus and method |
| 07/10/2013 | EP2611987A2 Systems and methods for monitoring a parameter of a subterranean formation using swellable materials |
| 07/10/2013 | EP2611985A1 An arm system for logging a wellbore and method for using same |
| 07/10/2013 | EP2611984A1 An anti-locking device for use with an arm system for logging a wellbore and method for using same |
| 07/10/2013 | CN203050687U Backpressure device used for observing fluid flowing in porous medium |
| 07/10/2013 | CN203050686U Temperature regulation and control device used for observing fluid flowing in porous medium |
| 07/10/2013 | CN203050685U Pore template device for observing fluid flow in porous medium |
| 07/10/2013 | CN203050684U Clamp piston and hole diameter logger |
| 07/10/2013 | CN203050683U Mud temperature detecting and displaying device in solid control system |
| 07/10/2013 | CN203050682U Testing device for storage-type coupling borehole thermometer |
| 07/10/2013 | CN203050681U Fracture monitoring device |
| 07/10/2013 | CN203050680U Wireless data acquisition device |
| 07/10/2013 | CN203050679U Directivity gamma measuring system |
| 07/10/2013 | CN203050678U Gyro inclinometer capable of storing measuring data |
| 07/10/2013 | CN203050677U Well mouth protective device of oil pipe conveying logging without drilling platform |
| 07/10/2013 | CN203050676U Sound-wave logging instrument with function of sound insulation |
| 07/10/2013 | CN203050675U Under-well multi-parameter imaging measuring system |
| 07/10/2013 | CN203050674U Novel well testing pulley |
| 07/10/2013 | CN203050673U High temperature resisting steam injection multiparameter logging instrument |
| 07/10/2013 | CN203050672U Bypass unlocking mechanism |
| 07/10/2013 | CN203050671U Water current metering device in coalbed methane discharge and recovery |
| 07/10/2013 | CN203050670U Resistivity thin-stratum lateral logging instrument |
| 07/10/2013 | CN203050669U Scale device of polar plate used for logging instrument |
| 07/10/2013 | CN203050592U Length-adjustable multistage logging lubricator |
| 07/10/2013 | CN1678815B Process for interpreting data measured in a hydrocarbon well in production |
| 07/10/2013 | CN103201455A Sensor on a drilling apparatus |
| 07/10/2013 | CN103195415A Underground high-speed information transmission system and method for drilling engineering |
| 07/10/2013 | CN103195414A Drill column communication system, component and method |
| 07/10/2013 | CN103195413A Visible dynamic leaking stoppage evaluation device |
| 07/10/2013 | CN103195412A Mechanical underground caliper probe and application method |
| 07/10/2013 | CN103195411A Comprehensive calibrating device for oil field underground instruments |
| 07/10/2013 | CN103195410A Well depth or hole depth measuring device and measuring method |
| 07/10/2013 | CN103195409A Multi-channel collection control system for gyro inclinometer |
| 07/10/2013 | CN103195408A Measuring method for flow imaging of oil well |
| 07/10/2013 | CN103195407A Signal processing device for range finding radar for drilling detecting layers of horizontal wells |
| 07/10/2013 | CN103195406A Fluid yield metering device of wellhead of pumped well |
| 07/10/2013 | CN103195405A System and method of directing-type rotary steering actuator mandrel displacement vector control |
| 07/10/2013 | CN102226393B Pressure monitoring and sound wave generation device of downhole blowout prevention system and control method thereof |
| 07/10/2013 | CN102174885B Calibration method for high-precision spot-measurement gyro inclinometer for well drilling |
| 07/10/2013 | CN102108858B Ground simulation measuring device and method for formation pressure while drilling |
| 07/10/2013 | CN102108855B Self-offset well shock detection device |
| 07/10/2013 | CN101798923B System and method for remote control coal mine evacuation working face advance detection and forecasting |
| 07/10/2013 | CN101737034B Method and system for transmitting pitshaft data |
| 07/10/2013 | CN101573507B An apparatus for creating pressure pulses in the fluid of a bore hole |
| 07/10/2013 | CN101545372B Carrier for pipe conveying well measuring component |
| 07/10/2013 | CN101410728B Method and apparatus for sensing a borehole characteristic |
| 07/09/2013 | US8484004 Systems and methods for improved positioning of pads |
| 07/09/2013 | US8479841 Assembly for drilling and logging, method for drilling and logging and device for electro pulse drilling |
| 07/09/2013 | US8479812 Method and system for accessing subterranean deposits from the surface and tools therefor |
| 07/09/2013 | US8479571 Christmas tree with internally positioned flowmeter |
| 07/09/2013 | CA2562461C Method of treating oil and gas wells |
| 07/09/2013 | CA2558797C Measuring borehole survey tool orientation using microgyros |
| 07/09/2013 | CA2558238C Downhole formation sampling |
| 07/09/2013 | CA2506912C Improved rotary pulser for transmitting information to the surface from a drill string down hole in a well |
| 07/09/2013 | CA2461521C Method and device for evaluating the physical parameters of an underground deposit using rock cuttings collected from it |
| 07/04/2013 | WO2013102185A1 Slabbed core format for borehole image data |
| 07/04/2013 | WO2013101694A2 Downhole ultrasonic transducer and method of making same |
| 07/04/2013 | WO2013101636A2 Method and system for calibrating a downhole imaging tool |
| 07/04/2013 | WO2013101601A1 Method and system for wireline intervention in a subsea well from a floating vessel |
| 07/04/2013 | WO2013101587A1 Magnetic ranging tool and method |
| 07/04/2013 | WO2013101581A1 Inter-tool communication flow control in toolbus system of cable telemetry |
| 07/04/2013 | WO2013101569A1 Cable telemetry synchronization system and method |
| 07/04/2013 | WO2013101484A1 Wireless two-way communication for downhole tools |
| 07/04/2013 | WO2013098546A1 Flexible pipe body and method |
| 07/04/2013 | WO2013098545A1 Elongate element for flexible pipe body and method |
| 07/04/2013 | WO2013098363A1 Downhole visualisation method |
| 07/04/2013 | WO2013067255A4 Well access tools |
| 07/04/2013 | WO2013016326A4 Detection of downhole vibrations using surface data from drilling rigs |
| 07/04/2013 | WO2012098464A3 Deployment of fibre optic cables and joining of tubing for use in boreholes |
| 07/04/2013 | WO2012058146A3 Packer fluid and system and method for remote sensing |
| 07/04/2013 | US20130170318 Device and method for attenuating acoustic signals |
| 07/04/2013 | US20130169385 Contactless data communications coupling |
| 07/04/2013 | US20130168085 Active drilling measurement and control system for extended reach and complex wells |
| 07/04/2013 | US20130168084 Determination of Stick Slip Conditions |
| 07/04/2013 | US20130168081 Wireless Two-Way Communication For Downhole Tools |
| 07/04/2013 | CA2857201A1 Systems and methods for automatic weight on bit sensor calibration and regulating buckling of a drillstring |
| 07/03/2013 | EP2610587A1 Underground Soil Excavation |
| 07/03/2013 | EP2610586A1 Underground soil excavation |
| 07/03/2013 | EP2610434A1 Downhole visualisation system |
| 07/03/2013 | EP2610433A1 Downhole high-power electromagnetic pulse emission apparatus |
| 07/03/2013 | EP2610432A1 Downhole ultrasonic transducer and method of making same |
| 07/03/2013 | EP2609801A1 Well logging tool |
| 07/03/2013 | EP2609453A1 Method and system of determining elemental content of an earth formation |
| 07/03/2013 | EP2609289A2 Monitoring of objects in conjunction with a subterranean well |
| 07/03/2013 | EP2609274A1 Apparatus and method of landing a well in a target zone |
| 07/03/2013 | CN203035193U ZIGBEE technology-based pressure transmitter |