| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 10/30/2013 | CN101796262B Well system and method for detecting and analyzing acoustic signals |
| 10/30/2013 | CN101787874B Intelligent injection allocation testing device of water injection well |
| 10/29/2013 | US8570833 Downlinking communication system and method |
| 10/29/2013 | US8570832 Variable throat venturi flow meter having a plurality of section-varying elements |
| 10/29/2013 | US8567524 Downhole apparatus with a wireless data communication device between rotating and non-rotating members |
| 10/29/2013 | US8567497 Apparatus and methods for inserting and removing tracer materials in downhole screens |
| 10/29/2013 | US8567496 System and method for managing a subterranean formation |
| 10/29/2013 | US8567495 System and method for detecting pressure in a subterranean environment |
| 10/29/2013 | CA2727134C Systems and methods using a continuously variable transmission to control one or more system components |
| 10/24/2013 | WO2013158729A1 Determining a limit of failure in a wellbore wall |
| 10/24/2013 | WO2013158682A2 Method and apparatus for monitoring a downhole tool |
| 10/24/2013 | WO2013158382A1 System and method to determine volumetric fraction of unconventional reservoir liquid |
| 10/24/2013 | WO2013049014A3 Apparatus for evaluating rock properties while drilling using drilling rig-mounted acoustic sensors |
| 10/24/2013 | US20130282290 Real-time definitive survey while drilling |
| 10/24/2013 | US20130277543 Metodo de analisis integral de pruebas de trazadores entre pozos petroleros |
| 10/24/2013 | US20130277115 Methods and systems of estimating formation parameters |
| 10/24/2013 | US20130277113 Method and apparatus for solid-liquid separation of drilling fluids for analysis |
| 10/24/2013 | US20130277041 Erosional protection of fiber optic cable |
| 10/24/2013 | CA2813878A1 Interacting hydraulic fracturing |
| 10/23/2013 | EP2653648A2 Real-time definitive survey while drilling |
| 10/23/2013 | EP2652266A2 Method of determining reservoir pressure |
| 10/23/2013 | EP2652265A2 Autonomous downhole conveyance system |
| 10/23/2013 | EP2652264A1 Well perforating with determination of well characteristics |
| 10/23/2013 | EP2652263A2 Well monitoring |
| 10/23/2013 | EP2652262A1 Method for automatic control and positioning of autonomous downhole tools |
| 10/23/2013 | EP2652261A1 Sensing shock during well perforating |
| 10/23/2013 | EP2652259A2 Apparatus and method for controlling fluid flow from a formation |
| 10/23/2013 | EP2652249A1 Downhole tool thermal device |
| 10/23/2013 | EP2652239A2 Electronic control system for a tubular handling tool |
| 10/23/2013 | CN203248147U Both-way communication system with measurement while drilling |
| 10/23/2013 | CN203248146U Transient electromagnetic method sleeve passing water finding detector |
| 10/23/2013 | CN203248145U Connecting rod distance measuring device |
| 10/23/2013 | CN203248144U Digital temperature and pressure measuring apparatus for oil field well mouth fluid |
| 10/23/2013 | CN103362502A Method and system for eliminating direct wave interference in acoustic logging, and acoustic logging instrument |
| 10/23/2013 | CN103362501A Integral decoding method and device of drilling fluid wireless log tool while drilling |
| 10/23/2013 | CN103362500A Detection system and method for cracks and caverns of fractured-vuggy carbonate reservoirs along with drilling |
| 10/23/2013 | CN103362499A Underground and ground information transmission data switching system and method |
| 10/23/2013 | CN103362498A Miniature Ba-137m releaser for dual-tracer flow well logging |
| 10/23/2013 | CN103362497A Sleeve pipe joint hoop measuring system based on high-power ultrasonic probe and match inductance |
| 10/23/2013 | CN103362496A Underground liquid level measuring device based on high-power ultrasonic probe admittance curve |
| 10/23/2013 | CN103362495A Hole panoramic image pair three-dimensional imaging method |
| 10/23/2013 | CN103362494A Subsea multiple annulus sensor |
| 10/23/2013 | CN103362493A Rotatable adaptive compensator of coiled tubing test string |
| 10/23/2013 | CN103362486A Digital underground layering water injection testing and adjusting process pipe column and operation method thereof |
| 10/23/2013 | CN103362460A Dislocated support-type centering guide for cased well logger |
| 10/23/2013 | CN102134992B Method and device for high-speed wired duplexing information communication between well and ground |
| 10/23/2013 | CN102134991B Method and device for high-speed wireless duplexing information communication between inside of slurry drilling well and ground surface |
| 10/23/2013 | CN101672170B Electric directional coring apparatus |
| 10/22/2013 | US8561721 Drill head connection |
| 10/22/2013 | US8561698 Downhole fluid injection |
| 10/22/2013 | US8561697 Downhole tool delivery system with self activating perforation gun |
| 10/22/2013 | US8561696 Method of placing ball sealers for fluid diversion |
| 10/22/2013 | US8561695 Apparatus and method for testing solids production in a wellbore |
| 10/22/2013 | US8561694 Monitoring downhole production flow in an oil or gas |
| 10/22/2013 | US8561693 Mobile well services assembly |
| 10/22/2013 | CA2765605C Air hammer optimization using acoustic telemetry |
| 10/22/2013 | CA2591137C Improved anchor arm for seismic logging tool |
| 10/20/2013 | CA2812062A1 Real-time definitive survey while drilling |
| 10/17/2013 | WO2013155287A1 Apparatuses and methods for at-bit resistivity measurements for an earth-boring drilling tool |
| 10/17/2013 | WO2013154945A1 Optimizing enhanced oil recovery by the use of oil tracers |
| 10/17/2013 | WO2013154535A1 Methods and apparatus for transmission of telemetry data |
| 10/17/2013 | WO2013154360A2 Water leak-detecting ground water pressure testing apparatus |
| 10/17/2013 | WO2013049044A3 Methods for evaluating rock properties while drilling using drilling rig-mounted acoustic sensors |
| 10/17/2013 | WO2012115779A3 Inground drill string housing and methods for signal coupling |
| 10/17/2013 | WO2008024807A3 Early kick detection in an oil and gas well |
| 10/17/2013 | US20130270008 Apparatuses and methods for at-bit resistivity measurements for an earth-boring drilling tool |
| 10/17/2013 | US20130270007 Apparatuses and methods for obtaining at-bit measurements for an earth-boring drilling tool |
| 10/17/2013 | US20130269945 Wireless communication system for monitoring of subsea well casing annuli |
| 10/17/2013 | DE102012007219A1 Device for measuring function of blowout preventers, has parallel lines of ultrasonic sensors that are connected with burst transmission unit and booster assembly, where output signals are supplied to output signal amplitude comparison unit |
| 10/16/2013 | EP2649475A1 System and method for declustering well log samples |
| 10/16/2013 | EP2649275A1 Gas generator for pressurizing downhole samples |
| 10/16/2013 | EP2649274A1 System and method for acoustic recording in well bottomhole assembly while firing a perforating gun |
| 10/16/2013 | EP2649273A1 Wireless communication between tools |
| 10/16/2013 | EP2649272A2 Pressure measurement in highly deviated wells |
| 10/16/2013 | CN203239333U Modularized sound wave receiving transducer device |
| 10/16/2013 | CN203239332U 偶极子天线 Dipole antenna |
| 10/16/2013 | CN203239331U Probe measuring high viscosity mixing fluid characteristics |
| 10/16/2013 | CN203239330U Sound detecting device for monitoring gas well leakage remotely |
| 10/16/2013 | CN203239329U Separated layer water injection high-pressure seal examining instrument |
| 10/16/2013 | CN203239328U Two-dimensional microcosmic visualization simulation experiment device |
| 10/16/2013 | CN203239327U Seal checking device of separate injection well |
| 10/16/2013 | CN203239326U Novel electric measurement equipment for inner diameter of pile hole |
| 10/16/2013 | CN203239325U Vertical shaft mechanical packer separate layer fracturing and separate layer pressure testing integrative process pipe string |
| 10/16/2013 | CN203239324U Anti-freezing pressure gage sampling valve |
| 10/16/2013 | CN203239323U Lower seat key short section |
| 10/16/2013 | CN203239322U Drilling cuttings quantity measurer |
| 10/16/2013 | CN203239321U Skid-mounted type multi-well automatic well selecting and metering device special for coal bed gas |
| 10/16/2013 | CN203239320U Layered flowmeter for water injection well with low injection allocation rate |
| 10/16/2013 | CN203239319U Mandrel used for induction logging instrument |
| 10/16/2013 | CN203239318U Oil-water two-phase flow measuring system of horizontal well |
| 10/16/2013 | CN203239317U Working parameter measuring device of screw drill tool for petroleum drilling |
| 10/16/2013 | CN203239304U Laboratory simulation test device for gas well foam water discharge |
| 10/16/2013 | CN203235624U Module glue filling system of well logging instrument while drilling |
| 10/16/2013 | CN103354858A Apparatus and methods for tracking the location of fracturing fluid in a subterranean formation |
| 10/16/2013 | CN103352695A Visualization physical simulation device with consideration of interlamination fluid channeling |
| 10/16/2013 | CN103352694A Logging instrument with acoustoelectric combination |
| 10/16/2013 | CN103352692A Optimized design method of reducing sonic system sound insulator of acoustic logging-while-drilling drill collar |
| 10/16/2013 | CN103352691A Orthogonal dipole acoustic logging sound system receiving device |
| 10/16/2013 | CN103352690A Transient electromagnetic logging transmitting probe |
| 10/16/2013 | CN103352689A Method for determining well diameter with radioactive tracing well measuring technology |