| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 07/25/2013 | WO2013106885A1 Improvements to equipment and methods for downhole surveying and data acquisition for a drilling operation |
| 07/25/2013 | US20130186688 Methods for determining formation strength of a wellbore |
| 07/25/2013 | US20130186685 High definition drilling rate of penetration for marine drilling |
| 07/25/2013 | US20130186620 Indicator and method of verifying a tool has reached a portion of a tubular |
| 07/25/2013 | US20130186619 Method and apparatus of distributed systems for extending reach in oilfield applications |
| 07/25/2013 | US20130186195 Apparatus including strain gauges for estimating downhole string parameters |
| 07/24/2013 | EP2616979A2 Production estimation in subterranean formations |
| 07/24/2013 | EP2616852A2 Downhole sensor assembly and method of using same |
| 07/24/2013 | EP2616639A2 Erosion tracer and monitoring system and methodology |
| 07/24/2013 | EP2616638A2 Apparatus and methods for drilling wellbores by ranging existing boreholes using induction devices |
| 07/24/2013 | EP2616637A2 Reservoir navigation using magnetic field of dc currents |
| 07/24/2013 | EP2616629A2 Managed pressure drilling apparatus |
| 07/24/2013 | CN203085662U Novel battery clamping mechanism |
| 07/24/2013 | CN203081433U Temperature tour inspection recorder for mines |
| 07/24/2013 | CN203081432U Full-wireless water well manufacturing parameter remote measurement and control system based on Zigbee technology |
| 07/24/2013 | CN203081431U Full-wireless oil well manufacturing parameter remote measurement and control system based on Zigbee technology |
| 07/24/2013 | CN203081430U High-temperature and high-pressure sand bed leaking stoppage simulation device |
| 07/24/2013 | CN203081429U Memory type electronic pressure gauge |
| 07/24/2013 | CN203081428U Magnetic grid unit discs, magnetic grid coded disc and device for measuring drilling tool angle position under condition of rotation |
| 07/24/2013 | CN203081427U Horizontal well logging metal umbrella fluid production profile tester protection device |
| 07/24/2013 | CN203081426U Horizontal well logging safety cable head |
| 07/24/2013 | CN203081425U Intelligent oil pumping unit stroke frequency displayer |
| 07/24/2013 | CN203081424U Visualization experiment facility for movement law of coal dust in crack |
| 07/24/2013 | CN203081423U Oil well oil metering device |
| 07/24/2013 | CN203081422U Oil well load measuring equipment of beam-free oil pumping machine |
| 07/24/2013 | CN203081421U Dynamic lifting device of horizontal well logging |
| 07/24/2013 | CN203081420U Universal joint of horizontal well logging |
| 07/24/2013 | CN203080561U Dismountable pile foundation hole verifying device |
| 07/24/2013 | CN203080513U Multi-axis interchangeable-type cement-soil mixing pile device capable of reducing soil compaction property |
| 07/24/2013 | CN1873186B Boring imaging system and method for conductive and resistive drilling fluids |
| 07/24/2013 | CN103221636A Reservoir navigation using magnetic field of DC currents |
| 07/24/2013 | CN103221635A System and method for remote sensing |
| 07/24/2013 | CN103221634A Clustered wellhead trunkline protection and testing system with ESP speed controller and emergency isolation valve |
| 07/24/2013 | CN103216224A Annular pressure monitoring sealing device for geological drilling |
| 07/24/2013 | CN103216223A Single sidewall contact device for microsphere focusing logging instrument |
| 07/24/2013 | CN103216222A High temperature and high pressure visual device for simulating microorganism oil displacement and simulating method thereof |
| 07/24/2013 | CN103216221A Wellhead testing device |
| 07/24/2013 | CN103216220A Horizontal drilling test device for rotary steerable tool |
| 07/24/2013 | CN102155216B Signal optimization and interference analysis method of continuous wave measurement while drilling |
| 07/24/2013 | CN101701519B Deep well unpowered data transmission device |
| 07/24/2013 | CN101397906B Locator using two measuring points of horizontal displacements |
| 07/23/2013 | US8490719 Method and apparatus for controlling bottom hole pressure in a subterranean formation during rig pump operation |
| 07/23/2013 | US8490717 Downhole magnetic measurement while rotating and methods of use |
| 07/23/2013 | US8490705 Hydraulic control system monitoring apparatus and method |
| 07/23/2013 | US8490693 Determining fracture orientation using wellbore acoustic radial profiles |
| 07/23/2013 | CA2699330C Method and apparatus for well-bore proximity measurement while drilling |
| 07/23/2013 | CA2559030C Core sample orientation |
| 07/20/2013 | CA2801485A1 Fiber optic formation dimensional change monitoring |
| 07/19/2013 | CA2802572A1 Assessing stress strain and fluid pressure in strata surrounding a borehole based on borehole casing resonance |
| 07/18/2013 | WO2013106736A1 Asphaltene content of heavy oil |
| 07/18/2013 | WO2013106593A1 Submersible pump control |
| 07/18/2013 | WO2013106545A1 System and algorithm for automatic shale picking and determination of shale volume |
| 07/18/2013 | WO2013106374A1 Apparatus and methods utilizing progressive cavity motors and pumps with independent stages |
| 07/18/2013 | WO2013105969A1 Method and system of planning and/or drilling wellbores |
| 07/18/2013 | WO2013105930A1 System and method for improved cuttings measurements |
| 07/18/2013 | WO2013105864A1 Method and system for wireless in-situ sampling of a reservoir fluid |
| 07/18/2013 | WO2013070831A3 Emat acoustic signal measurement using modulated gaussian wavelet and hilbert demodulation |
| 07/18/2013 | WO2012166931A3 Method of incorporating remote communication with oilfield tubular handling apparatus |
| 07/18/2013 | WO2012120385A3 Apparatus, system and method for determining at least one downhole parameter of a wellsite |
| 07/18/2013 | WO2012107727A3 Well testing and production apparatus and method |
| 07/18/2013 | WO2012094626A4 Test packer and method for use |
| 07/18/2013 | US20130180726 Well |
| 07/18/2013 | US20130180710 Carbon dioxide content of natural gas from other physical properties |
| 07/18/2013 | US20130180709 Well Completion Apparatus, System and Method |
| 07/18/2013 | US20130180327 Method for creating a 3d model of a hydrocarbon reservoir, and method for comparative testing of hydrocarbon recovery techniques |
| 07/18/2013 | CA2860865A1 Method and system of planning and/or drilling wellbores |
| 07/17/2013 | CN203066960U Hand-held data acquisition unit for oil fields |
| 07/17/2013 | CN203066959U Drill direction measuring system |
| 07/17/2013 | CN203066958U Boring detection imaging system |
| 07/17/2013 | CN203066957U Rod pumped well indicator diagram oil gauging system with manual operation system |
| 07/17/2013 | CN203066956U Oil and gas well perforating ground monitoring device |
| 07/17/2013 | CN203066887U Insulating short joint for transmission data of electromagnetic wave measurement while drilling during drilling |
| 07/17/2013 | CN103210181A Formation sensing and evaluation drill |
| 07/17/2013 | CN103210179A Navigation system |
| 07/17/2013 | CN103206923A Multi-arm underground caliper measurement probe and application method |
| 07/17/2013 | CN103206209A Comprehensive simulation experiment device for reservoir heterogeneity |
| 07/17/2013 | CN103206206A Method for calculating fracture pressure of ultra deep well formations |
| 07/17/2013 | CN103206205A Tubing string service life prediction method |
| 07/17/2013 | CN103206204A Method for predicting service life of two-stage tubing string |
| 07/17/2013 | CN103206203A Analytical method of single-shot perforation sand production in oil well |
| 07/17/2013 | CN103206202A Deep-sea pipe-in-pipe mechanical transfer characteristic analysis experiment device |
| 07/17/2013 | CN103206201A Automatic control measurement device of oil well |
| 07/17/2013 | CN103206198A Visualized experiment method of polymer flooding oil deposit well pattern adjustment aiding chemical flooding |
| 07/17/2013 | CN101832128B Active device and method for measuring pressure of coal-bed gas |
| 07/17/2013 | CN101806214B Ultra-deep well drilling simulation experiment device |
| 07/17/2013 | CN101460699B A method and apparatus for patching a well by hydroforming a tubular metal patch, and a patch for this purpose |
| 07/16/2013 | US8486702 Method of tracking fluids produced from various zones in subterranean well |
| 07/16/2013 | US8485277 Bottom-hole assembly, and a method and system for transmitting data from a bottom-hole assembly |
| 07/16/2013 | US8485264 Multi-stage modulator |
| 07/16/2013 | US8485253 Anti-locking device for use with an arm system for logging a wellbore and method for using same |
| 07/16/2013 | US8485252 In situ recovery from a hydrocarbon containing formation |
| 07/16/2013 | US8485027 Borehole force measurement |
| 07/16/2013 | US8484858 Wall contact caliper instruments for use in a drill string |
| 07/16/2013 | CA2411083C Wireless communication system and method |
| 07/13/2013 | CA2768868A1 Downhole digital survey camera |
| 07/12/2013 | CA2800593A1 Instrumented rod rotator |
| 07/11/2013 | WO2013103976A1 Horizontal directional drilling area network and methods |
| 07/11/2013 | WO2013103875A1 Advanced drill string communication system, components and methods |
| 07/11/2013 | WO2013103817A2 Active drilling measurement and control system for extended reach and complex wells |
| 07/11/2013 | WO2013103789A2 Gravel pack inner string hydraulic locating device |