| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 12/20/2012 | CA2830682A1 Systems and methods for placing markers in a formation |
| 12/19/2012 | EP2534508A2 X-ray fluorescence analyzer |
| 12/19/2012 | EP2534504A2 Passive micro-vessel and sensor |
| 12/19/2012 | EP2534474A2 Automated drilling fluid analyzer |
| 12/19/2012 | EP2534337A1 Subsea optical switch |
| 12/19/2012 | EP2534330A2 System and method for determining position within a wellbore |
| 12/19/2012 | CN202611690U 580 logging system |
| 12/19/2012 | CN202611689U Self-sealing quick pressure monitoring device |
| 12/19/2012 | CN202611688U Thickened oil reservoir thermal extraction linear physical simulation system |
| 12/19/2012 | CN202611687U A multipurpose downhole pressure transducer for screw pumps and oil pumping units |
| 12/19/2012 | CN202611686U Wireless relay electromagnetic wave measurement while drilling device for coal mines |
| 12/19/2012 | CN202611685U Gyro attitude measuring instrument for combination logging |
| 12/19/2012 | CN202611684U Gravity deflection angle and relative orientation measuring device |
| 12/19/2012 | CN202611683U Omni-directional probe for downhole television system |
| 12/19/2012 | CN202611682U Oil well yield single-well separate generation device |
| 12/19/2012 | CN202611681U Lifting device for coal mine downhole detecting instrument |
| 12/19/2012 | CN202611680U Cam flow concentration type heavy oil fluid production profile direct-reading test instrument |
| 12/19/2012 | CN202611679U Leadless electromagnetic wave measurement while drilling device for coal mine |
| 12/19/2012 | CN202611678U Calibration device of well logging instrument |
| 12/19/2012 | CN202611638U Oil pipe crawler for underground traction cable and collector |
| 12/19/2012 | CN102834583A Subsea orientation and control system |
| 12/19/2012 | CN102828747A Petroleum drilling real-time monitoring system |
| 12/19/2012 | CN102828743A Tracing quantum dot water injection cross-section logging method |
| 12/19/2012 | CN102828742A Time difference positioning system and method of deep well drill bit position |
| 12/19/2012 | CN102828741A Filtering method and device for positioning of rotating magnetic field of horizontal well |
| 12/19/2012 | CN102828740A Monitoring tool for temperature field and pressure field of pit-shaft and testing tubular pile |
| 12/19/2012 | CN102828739A Underground multi-parameter imaging measurement system |
| 12/19/2012 | CN102828737A Display mechanism of electronic weight indicator |
| 12/19/2012 | CN102828736A Real-time adjustable and controllable hanging type underground oil and water separating system |
| 12/19/2012 | CN102828718A Portable insurance type testing instrument wellhead falling preventing device |
| 12/19/2012 | CN102011566B Leakage risk early warning method for offshore oil and gas production device |
| 12/19/2012 | CN101560871B Multi-pipe-column injection test thermal recovery wellhead device |
| 12/19/2012 | CN101285380B Measuring method for water level of drilled shaft |
| 12/18/2012 | US8335406 Temperature sensor using an optical fiber |
| 12/18/2012 | US8334786 Down-hole wireless communication system |
| 12/18/2012 | CA2576138C Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell |
| 12/15/2012 | CA2779996A1 Methods and systems for monitoring and modeling hydraulic fracturing of a reservoir field |
| 12/15/2012 | CA2743348A1 Method and apparatus for detecting plunger arrival |
| 12/13/2012 | WO2012170987A2 Method for cost effective sampling and characterization of heterogeneous unconventional hydrocarbon regions |
| 12/13/2012 | WO2012170553A2 Method to look ahead of the bit |
| 12/13/2012 | WO2012170030A1 Method and apparatus for shaping a well hole |
| 12/13/2012 | WO2012168614A2 Method for determing the complex response of a permeable stratum |
| 12/13/2012 | WO2012122247A3 A method and apparatus for estimating a downhole fluid property using a miniature integrated circuit spectrometer |
| 12/13/2012 | US20120316788 Formation Testing Planning And Monitoring |
| 12/13/2012 | US20120314540 Hollow rebar for crosshole sonic logging access tubes and longitudinal concrete reinforcing in drilled shafts |
| 12/13/2012 | US20120313790 Downhole apparatus |
| 12/13/2012 | US20120313632 Method and device for determining the existence and location of stress-inducing forces on a rod |
| 12/13/2012 | US20120312601 Systems and methods of a clamp for a sample bottle assembly |
| 12/13/2012 | US20120312552 Self-Tightening Clamps to Secure Tools along The Exterior Diameter of A Tubing |
| 12/13/2012 | US20120312531 Well Treatment Using Electric Submersible Pumping System |
| 12/13/2012 | US20120312530 In-Situ Detection and Analysis of Methane in Coal Bed Methane Formations with Spectrometers |
| 12/13/2012 | US20120312529 Reducing trips in well operations |
| 12/13/2012 | CA2838803A1 Method and apparatus for shaping a well hole |
| 12/12/2012 | EP2531695A2 Spoolable signal conduction and connection line and method |
| 12/12/2012 | EP2531693A2 Packer deployed formation sensor |
| 12/12/2012 | CN202597851U System improving efficiency and reliability of electromagnetic valve |
| 12/12/2012 | CN202596726U Device for detecting down-hole hydrogen sulfide while drilling |
| 12/12/2012 | CN202596721U Forty-arm caliper |
| 12/12/2012 | CN202596720U Novel injection well pressure taking device |
| 12/12/2012 | CN202596719U Movable high-temperature and high-pressure gauge connector |
| 12/12/2012 | CN202596718U Portable wellhead hanging load indicating recorder |
| 12/12/2012 | CN202596717U Pressure tester for oil extraction tree |
| 12/12/2012 | CN202596716U Self-identification oil well liquid level monitor |
| 12/12/2012 | CN202596715U Remote control automatic liquid surface monitor |
| 12/12/2012 | CN202596714U Verifying table of liquid level testing instrument |
| 12/12/2012 | CN202596713U Rotary drilling rig and sounding device thereof |
| 12/12/2012 | CN202596712U Gyroscope inclinometer in well for measurement |
| 12/12/2012 | CN202596711U Magnetometer in well |
| 12/12/2012 | CN202596710U Elastic compensating electronic pressure gauge vibration damping support barrel |
| 12/12/2012 | CN202596709U Oil well fault intelligent diagnosing device |
| 12/12/2012 | CN202596708U Storage acoustic variable density logging device |
| 12/12/2012 | CN202596707U Production profile logger single core fast connecting mechanism |
| 12/12/2012 | CN202596706U Drill hole bottom sediment thickness detection device based on hardness difference sensing |
| 12/12/2012 | CN202596705U Vehicle-mounted single well measuring device |
| 12/12/2012 | CN202596704U Guiding shoe lockout device for keyseat sticking type measurement while drilling apparatus |
| 12/12/2012 | CN202596703U High-accuracy flow testing device for injection well |
| 12/12/2012 | CN202596702U Differential pressure type oil well liquid-producing capacity checking device |
| 12/12/2012 | CN202596701U Impact detecting device for metering mass of solid particles in liquid-solid two-phase system |
| 12/12/2012 | CN202596700U Single sidewall contact device for micro-spherically focused tool |
| 12/12/2012 | CN202596689U Oil well liquid drainage joint-operation device |
| 12/12/2012 | CN202596684U Testing process pipe column for casing pipe well completion horizontal well multistage subsection production and water detection |
| 12/12/2012 | CN202596655U Efficient blowout-control end cap for water injection well test |
| 12/12/2012 | CN202596640U Pressure measurement exhaust-control well plugging device |
| 12/12/2012 | CN202596637U Delivery and fishing device for frictional pressure gauge |
| 12/12/2012 | CN102817619A Combined advanced drilling exploration method for detecting water-free dissolving cavity and water dissolving cavity in tunnel |
| 12/12/2012 | CN102817608A Array type electrode system for induced polarization potential logging instrument |
| 12/12/2012 | CN102817607A Underground communication system of continuous pipe drill |
| 12/12/2012 | CN102817606A Well trajectory while drilling detector and well trajectory while drilling detection monitoring method |
| 12/12/2012 | CN102817605A Method for accurately measuring elevation of drilling point in subterranean drilling |
| 12/12/2012 | CN102817598A Thick oil dissolving gas-drive infilling exploitation physical simulation experimental facility and thick oil dissolving gas-drive encryption mining physical simulation experimental method |
| 12/12/2012 | CN102817567A Underground repetitive shock irritation device and shock irritation method for oil and gas well drilling |
| 12/12/2012 | CN102493803B Three-axle-table-based oil-gas migration simulator, and simulation experiment method |
| 12/12/2012 | CN102071924B Omnibearing continuous measurement method of gyroscopic clinometer |
| 12/12/2012 | CN102061909B Process for determining azimuth angle on disc scales |
| 12/12/2012 | CN101713289B Lead recovering type deep-well unpowered data transmission device |
| 12/12/2012 | CN101709629B Reverse circulation aerodynamic cavitation method for coalbed methane well and equipment |
| 12/12/2012 | CN101430402B 烃监视电缆 Hydrocarbon monitor cable |
| 12/11/2012 | US8327934 Acoustically measuring annulus probe depth |
| 12/11/2012 | CA2791241A1 Pressure sensor arrangement using an optical fiber and methodologies for performing an analysis of a subterranean formation |
| 12/11/2012 | CA2525451C A device for monitoring of oil-water interface |