| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 06/13/2013 | WO2013022725A4 Realtime dogleg severity prediction |
| 06/13/2013 | WO2013009501A3 Cnt fiber based impedance spectroscopy for characterizing downhole fluids |
| 06/13/2013 | WO2013001262A3 Downhole signalling systems and methods |
| 06/13/2013 | WO2012100259A3 Telemetry operated circulation sub |
| 06/13/2013 | WO2012089993A3 Fluidic oscillators for use with a subterranean well |
| 06/13/2013 | US20130151219 Multi-parameter bit response model |
| 06/13/2013 | US20130151216 Method and system for optimizing downhole fluid production |
| 06/13/2013 | US20130151158 Utilization of dynamic downhole surveying measurements |
| 06/13/2013 | US20130151154 Apparatus for Testing Swellable Materials |
| 06/13/2013 | US20130148300 Well logging tool |
| 06/13/2013 | US20130147633 Modular Data Acquisition for Drilling Operations |
| 06/13/2013 | US20130146359 Method and system for monitoring a well for unwanted formation fluid influx |
| 06/13/2013 | US20130146356 Advanced underground homing system, apparatus and method |
| 06/13/2013 | US20130146282 Estimation of Production Sweep Efficiency Utilizing Geophysical Data |
| 06/13/2013 | US20130145838 Encapsulated downhole sensor and method of applying a metallic layer to a downhole sensor |
| 06/13/2013 | CA2852502A1 Positioning system and method for automated alignment and connection of components |
| 06/13/2013 | CA2797166A1 Visual ram position indicator apparatuses and methods |
| 06/12/2013 | EP2601379A1 Apparatus and methods for real time communication in drill strings |
| 06/12/2013 | EP2601378A1 Apparatus and methods for real time communication between drill bit and drilling assembly |
| 06/12/2013 | EP2601374A2 Clamp |
| 06/12/2013 | EP2601276A1 Tagged scale inhibitor compositions and methods of inhibiting scale |
| 06/12/2013 | CN202991022U Underground turbine drilling fluid drainage device |
| 06/12/2013 | CN202991021U Underground self-powered slurry signal generator |
| 06/12/2013 | CN202991020U Wireless impulse generator during drilling |
| 06/12/2013 | CN202991019U Acoustic logging transmitting transducer driving system |
| 06/12/2013 | CN202991018U Wireless sensor acquisition system for logging |
| 06/12/2013 | CN202991017U Pore-forming pile radius detector for rotary drilling pile |
| 06/12/2013 | CN202991016U Oil well logging temperature box |
| 06/12/2013 | CN202991015U Continuous remote monitoring system of working fluid level of oil well |
| 06/12/2013 | CN202991014U Well depth winch encoder |
| 06/12/2013 | CN202991013U Connecting sealing structure |
| 06/12/2013 | CN202991012U Multi-arm well diameter imager |
| 06/12/2013 | CN202991011U Polar plate assembly for logging instrument |
| 06/12/2013 | CN202991010U High-precision ultrasonic storage type flow meter |
| 06/12/2013 | CN202991009U Movable type flow instrument for single oil well |
| 06/12/2013 | CN202991008U Dynamometric device for simulating mechanical characteristic of bottom-hole assembly |
| 06/12/2013 | CN202991007U Multi-parameter logger |
| 06/12/2013 | CN202991006U Novel well testing vehicle |
| 06/12/2013 | CN202990967U Switching type sliding sleeve fracturing valve |
| 06/12/2013 | CN202990961U Producing, metering and automatic well-reversing device for unattended oil regions |
| 06/12/2013 | CN202990886U Ceiling perforating device |
| 06/12/2013 | CN202989927U Pore-forming bottom sediment detector for rotary drilling pile |
| 06/12/2013 | CN103154667A Down hole surveying tool |
| 06/12/2013 | CN103147748A Downwards-opened drilling acoustic wave test water plugging device |
| 06/12/2013 | CN103147747A Acoustic logging-while-drilling device and acoustic logging-while-drilling method |
| 06/12/2013 | CN103147746A Modular sound wave receiving transducer device |
| 06/12/2013 | CN103147745A Three dimensional sonic logging data high-speed transmission device based on LVDS technology |
| 06/12/2013 | CN103147744A Spectral measurement device of horizontal well fluid flowing parameter |
| 06/12/2013 | CN103147743A Measurement-while-drilling two-way communication method and system thereof |
| 06/12/2013 | CN103147742A Direct-reading type seal checking instrument suitable for concentric adjustable water distributor |
| 06/12/2013 | CN103147741A Coal bed roadside pressure relief zone width measuring system and method based on drill hole gas leakage |
| 06/12/2013 | CN103147740A Method for testing liquid level echo time |
| 06/12/2013 | CN103147739A Fiber-optic gyroscope inertial measurement unit (IMU) assembly used for petroleum clinometer |
| 06/12/2013 | CN103147738A Multifunctional separating and metering tank |
| 06/12/2013 | CN103147737A Drilling detection method for disclosing law of overburden failure in ascending mining |
| 06/12/2013 | CN103147736A Underground electrical control direct-reading sealing examination instrument for water injection well |
| 06/12/2013 | CN103147735A Motor-driven type releaser |
| 06/12/2013 | CN102128024B Shock absorption connector for shock detection device in well |
| 06/12/2013 | CN102086762B Portable digital control logging instrument |
| 06/12/2013 | CN101963055B Method for measuring multi-phase flow |
| 06/12/2013 | CN101440705B Super-deep well wireless transmission well testing system |
| 06/12/2013 | CA2798378A1 Method and system for monitoring a well for unwanted formation fluid influx |
| 06/08/2013 | CA2798341A1 System and method for testing fluid seals for leaks |
| 06/06/2013 | WO2013082498A2 Automated drilling system |
| 06/06/2013 | WO2013082055A1 Formation fluid sampling |
| 06/06/2013 | WO2013081867A1 Source spectrum control of nonlinearities in optical waveguides |
| 06/06/2013 | WO2013081808A1 Marine isolation assembly |
| 06/06/2013 | WO2013081775A1 Use of downhole pressure measurements while drilling to detect and mitigate influxes |
| 06/06/2013 | WO2013081584A1 Release assembly for a downhole tool string and method for use thereof |
| 06/06/2013 | WO2013079574A1 Pressure integrity testing system |
| 06/06/2013 | WO2013022646A4 Systems and methods for downhole communications using power cycling |
| 06/06/2013 | WO2013006735A4 A space provision system using compression devices for the reallocation of resources to new technology, brownfield and greenfield developments |
| 06/06/2013 | WO2013003151A4 Control of downhole safety devices |
| 06/06/2013 | WO2012168614A3 Method for determing the complex response of a permeable stratum |
| 06/06/2013 | US20130140087 Dual pipe rod assembly section, horizontal drilling device and probe housing |
| 06/06/2013 | US20130139583 Methods to characterize sag in fluids |
| 06/06/2013 | CA2857001A1 Source spectrum control of nonlinearities in optical waveguides |
| 06/06/2013 | CA2856921A1 An adaptive method for high data rate communication in wells |
| 06/06/2013 | CA2856578A1 Marine isolation assembly |
| 06/06/2013 | CA2856172A1 Pressure integrity testing system |
| 06/06/2013 | CA2852710A1 Use of downhole pressure measurements while drilling to detect and mitigate influxes |
| 06/05/2013 | EP2599955A1 Pressure integrity testing system |
| 06/05/2013 | EP2599951A2 Seabed well influx control system |
| 06/05/2013 | EP2598715A1 Monitoring of drilling operations with flow and density measurement |
| 06/05/2013 | CN202977919U Portable connection structure of coaxial shielding line between sealing cavities at high temperature and under high pressure |
| 06/05/2013 | CN202975780U Automatic metering monitoring device of oil well |
| 06/05/2013 | CN202974920U Storage type conducting probe moisture content meter |
| 06/05/2013 | CN202970706U Novel drivepipe coupling positioner used for coiled tubing |
| 06/05/2013 | CN202970705U Mechanical transmission arm used for pipeline inner diameter detection |
| 06/05/2013 | CN202970704U Multipoint interpolation hole diameter calibration device |
| 06/05/2013 | CN202970703U Mounting mechanism of pressure sensor of water injection well |
| 06/05/2013 | CN202970702U Rotary drilling rig with depth measurement function |
| 06/05/2013 | CN202970701U Relief well and accident well communication detection system based on three-electrode system |
| 06/05/2013 | CN202970700U Damping structure between rotating mechanism and outer shell in gyro inclinometer |
| 06/05/2013 | CN202970699U Laser type angular-difference measuring instrument |
| 06/05/2013 | CN202970698U Buffering short section |
| 06/05/2013 | CN202970697U Structure for mounting centralizer by using base tube and salvage cap |
| 06/05/2013 | CN202970696U Detection device used for draw shaft well wall scanning |
| 06/05/2013 | CN202970695U Panoramic scanning system used for mine |
| 06/05/2013 | CN202970694U Oil well video monitoring terminal based on Linus platform |