| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 09/19/2013 | WO2013098280A3 Downhole communication |
| 09/19/2013 | WO2013026718A3 Temperature sensor |
| 09/19/2013 | WO2012148902A4 Hybrid transponder system for long-range sensing and 3d localization |
| 09/19/2013 | WO2012148890A4 Methods of employing and using a hybrid transponder system for long-range sensing and 3d localization |
| 09/19/2013 | WO2011017416A8 Systems and methods for monitoring a well |
| 09/19/2013 | US20130245948 Extracting downhole flow profiles from tracer flowback transients |
| 09/19/2013 | US20130240205 Systems and methods for reservoir production management |
| 09/19/2013 | US20130239673 Systems and Methods for Collecting One or More Measurements in a Borehole |
| 09/19/2013 | CA2866922A1 Improvements to downhole surveying |
| 09/18/2013 | EP2639565A1 Method and device for determining pressure in a cavity |
| 09/18/2013 | EP2639401A1 Wellbore real-time monitoring and analysis of fracture contribution |
| 09/18/2013 | EP2639400A1 Rotating control head radial seal protection and leak detection systems |
| 09/18/2013 | EP2638416A2 Method and system for pulse neutron capture sigma inversion |
| 09/18/2013 | EP2638246A1 System and method of constant depth of cut control of drilling tools |
| 09/18/2013 | EP2638245A1 System and method of constant depth of cut control of drilling tools |
| 09/18/2013 | EP2638244A2 System and method for remote sensing |
| 09/18/2013 | EP2638243A2 System and method of configuring drilling tools utilizing a critical depth of cut control curve |
| 09/18/2013 | EP2638242A2 Underground drilling apparatus |
| 09/18/2013 | EP2638241A2 Sensor on a drilling apparatus |
| 09/18/2013 | EP2523357B1 Subsea data communication system and method |
| 09/18/2013 | CN203201548U System for identifying location of piston capable of moving along length direction of well |
| 09/18/2013 | CN203201547U Long-arm combined type drilling horizontal declination angle measuring scale for coal mine |
| 09/18/2013 | CN203201546U Radial damping structure |
| 09/18/2013 | CN203201545U Well-cementation cement sheath integrity simulation evaluating tester |
| 09/18/2013 | CN203201544U Testing device for simulation detecting of position of water rich area of mine coal rock layer |
| 09/18/2013 | CN203201543U Gamma short section connecting protecting device |
| 09/18/2013 | CN203201515U 井下打捞工具 Downhole Fishing Tools |
| 09/18/2013 | CN103314181A Sensor array configuration for swept-wavelength interferometric-based sensing systems |
| 09/18/2013 | CN103306669A Multi-mode multi-depth resistivity measurement instrument and application method of multi-mode multi-depth resistivity measurement instrument |
| 09/18/2013 | CN103306668A EM-MWD (electromagnetic-measurement-while-drilling) transmission system for prolonging antenna lower arm |
| 09/18/2013 | CN103306667A Gas drilling depth detection equipment |
| 09/18/2013 | CN103306666A Wireless-inclinometer drill-lifting-free well-descending device |
| 09/18/2013 | CN103306665A Testing device for geological storage of carbon dioxide in coal seams |
| 09/18/2013 | CN103306664A Wellbore real-time monitoring and analysis of fracture contribution |
| 09/18/2013 | CN103306663A Uranium ore logging method |
| 09/18/2013 | CN103306651A Multi-angle displacement CT scanning system based on top gas injection |
| 09/18/2013 | CN103306623A High efficiency coring method for portable drilling machine in integral hard rock |
| 09/18/2013 | CN102359350B Centering device |
| 09/18/2013 | CN101915094B Structuring method of continuous monitoring system of overburden rock displacement in ore bed mining process |
| 09/18/2013 | CN101443531B Method for determining filtration properties of rocks |
| 09/17/2013 | US8537027 Method for controlling an electronic device and electronic device |
| 09/17/2013 | US8534381 High LCM positive pulse MWD component |
| 09/17/2013 | US8534114 Sand detector calibration |
| 09/17/2013 | CA2765306C Drilling collision avoidance apparatus, methods, and systems |
| 09/17/2013 | CA2585044C Acoustic telemetry system optimization |
| 09/16/2013 | CA2808858A1 Wellbore real-time monitoring and analysis of fracture contribution |
| 09/12/2013 | WO2013134176A1 High temperature and vibration protective electronic component packaging |
| 09/12/2013 | WO2013133890A2 Latching assembly for wellbore logging tools and method of use |
| 09/12/2013 | WO2013133861A2 Method for communicating with logging tools |
| 09/12/2013 | WO2013133860A2 Method and assembly for conveying well logging tools |
| 09/12/2013 | WO2013131500A1 Method for checking the sealing of cavern access bores |
| 09/12/2013 | WO2013043663A3 Dual purpose observation and production well |
| 09/12/2013 | WO2013022535A3 Methods for monitoring a water source using opticoanalytical devices |
| 09/12/2013 | US20130238245 System and method of configuring drilling tools utilizing a critical depth of cut control curve |
| 09/12/2013 | US20130233619 Method of determining a formation parameter |
| 09/12/2013 | US20130233538 Methods and Systems for Evaluating a Boundary Between a Consolidating Spacer Fluid and a Cement Composition |
| 09/11/2013 | EP2637043A1 Systems and methods for downhole cement evaluation |
| 09/11/2013 | EP2636841A1 Rotating control head radial seal protection and leak detection systems |
| 09/11/2013 | EP2635771A1 Leak detection and early warning system for capped or abandoned subsea wellheads |
| 09/11/2013 | EP2635770A2 Distributed fluid velocity sensor and associated method |
| 09/11/2013 | EP2635765A2 Parameter sensing and monitoring |
| 09/11/2013 | CN203192204U Underground data acquisition and transmission device |
| 09/11/2013 | CN203189011U Coal-bed gas well remote intelligent collecting and monitoring system |
| 09/11/2013 | CN203189010U Load displayer for sand prevention |
| 09/11/2013 | CN203189009U Microballoon density borehole diameter combination sidewall contact device based on hydraulic principle and logger |
| 09/11/2013 | CN203189008U Oil-water detection device under oil pool state |
| 09/11/2013 | CN203189007U Device for measuring well depth or hole depth |
| 09/11/2013 | CN203189006U Rotary drilling hole-drilling wireless inclinometer |
| 09/11/2013 | CN203189005U Track measuring system by putting abrasion drill in drill hole |
| 09/11/2013 | CN203189004U Minitype guide probe |
| 09/11/2013 | CN203189003U Electronic circuit protection device of logging while drilling (LWD) system |
| 09/11/2013 | CN203189002U Oil exploration logging while drilling LWD system cooling device |
| 09/11/2013 | CN203189001U Underground drilling device structure |
| 09/11/2013 | CN203189000U Underground magnetic positioning device of steel pipe cable |
| 09/11/2013 | CN203188999U Oil field single well intelligent meter regulator |
| 09/11/2013 | CN203188998U Oil field test detection base |
| 09/11/2013 | CN203188997U Well opening testing device |
| 09/11/2013 | CN203188996U Rotary guiding tool horizontal drilling test device |
| 09/11/2013 | CN203188995U Insulating short section |
| 09/11/2013 | CN203188994U Integrated type crude oil on-line automatic metering device |
| 09/11/2013 | CN203188985U Direct-reading flow electrically controlled water distributor |
| 09/11/2013 | CN103299032A Method and apparatus for monitoring vibration using fiber optic sensors |
| 09/11/2013 | CN103297372A Underground data high-speed wireless transmission system and method for reducing peak-to-average power ratio thereof |
| 09/11/2013 | CN103291290A Slurry gas detecting method in pit |
| 09/11/2013 | CN103291288A Mining wireless drilling stress sensor |
| 09/11/2013 | CN103291286A Control system and control method for controlling down-hole instrument of wireless measurement-while-drilling instrument from ground by aid of drilling fluid |
| 09/11/2013 | CN103291285A Experimental apparatus and experimental method for simulating gas-well annulus pressure carrying and air cutting processes |
| 09/11/2013 | CN103291284A Method and device both based on annulus pressure measuring while drilling and for early monitoring gas invasion of wellhole |
| 09/11/2013 | CN103291283A Full-automatic calibrating prepressing mechanism of pressure gage |
| 09/11/2013 | CN103291282A Measurement while drilling system for drill carriage |
| 09/11/2013 | CN103291281A Pressure-bearing outer shell of petroleum well logging instrument |
| 09/11/2013 | CN103291280A Sub-driver combination logging probe digital control system |
| 09/11/2013 | CN103291279A Method for optimizing micro abnormal signal of gas logging value |
| 09/11/2013 | CN103291278A Three-dimensional array induction calibration device for radial component calibration |
| 09/11/2013 | CN103291277A Calibration device for three-dimensional array induction logging instrument |
| 09/11/2013 | CN103291216A Orientation system for horizontal drill of deep-hole drill carriage |
| 09/11/2013 | CN102390790B System, device and method for realizing operation protection of logging winch |
| 09/11/2013 | CN101936132B Reciprocating drill for mine |
| 09/11/2013 | CN101936128B Drilling machine for mines |
| 09/11/2013 | CN101936127B Mine drilling machine |