| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 06/06/2012 | CN202266211U 一种冲击钻收尘装置 An impact drill dust collection device |
| 06/06/2012 | CN102486088A Horizontal well geosteering system |
| 06/06/2012 | CN102486087A Gas discharging hole logging unit fixing device |
| 06/06/2012 | CN102486086A Method and device for improving butting reliability of underground flow measuring and adjusting instrument |
| 06/06/2012 | CN101403293B Column type down-hole shut-in well delamination pressure test technique suitable for oil well |
| 06/05/2012 | US8195400 Directional resistivity imaging using harmonic representations |
| 06/05/2012 | US8191653 System and method for tracking and maintaining an on-grade horizontal borehole |
| 06/05/2012 | US8191651 Sensor on a formation engaging member of a drill bit |
| 06/05/2012 | US8191632 Method of treating a subterranean formation using a rheology model for fluid optimization |
| 06/05/2012 | US8191629 Pressure equalising devices |
| 06/05/2012 | US8191628 Method and apparatus for transmitting sensor response data and power through a mud motor |
| 06/05/2012 | US8191416 Instrumented formation tester for injecting and monitoring of fluids |
| 06/05/2012 | CA2691583C Logging tool sonde sleeve |
| 05/31/2012 | WO2012071183A2 Downhole imaging system and related methods of use |
| 05/31/2012 | WO2012071103A1 System and method for estimating fluid distribution in a subterranean reservoir |
| 05/31/2012 | WO2012069541A1 Downhole system having a wireless unit |
| 05/31/2012 | WO2012068629A1 Apparatus and method for obtaining information from drilled holes for mining |
| 05/31/2012 | WO2012047693A3 Formation sensing and evaluation drill |
| 05/31/2012 | WO2012037458A3 Apparatus and methods for drilling wellbores by ranging existing boreholes using induction devices |
| 05/31/2012 | WO2012037317A3 Method and apparatus for predicting petrophysical properties from nmr data in carbonate rocks |
| 05/31/2012 | WO2012027633A3 Mud pulse telemetry noise reduction method |
| 05/31/2012 | WO2011139761A3 Gain-corrected measurements |
| 05/31/2012 | US20120136579 Apparatus and Method for Detecting and Quantifying Leakage in a Pipe |
| 05/31/2012 | US20120136577 Systems and methods for monitoring corrosion in a well |
| 05/31/2012 | US20120132468 Cutter with diamond sensors for acquiring information relating to an earth-boring drilling tool |
| 05/31/2012 | US20120132418 Wellbore operations, systems, and methods with McNano devices |
| 05/31/2012 | US20120132417 Systems and methods for monitoring a well |
| 05/31/2012 | US20120132007 Use of fiber optics to monitor cement quality |
| 05/31/2012 | US20120131996 Method and apparatus for logging a wellbore |
| 05/31/2012 | CA2818830A1 Downhole system having a wireless unit |
| 05/31/2012 | CA2818188A1 Mining |
| 05/31/2012 | CA2815115A1 System and method for estimating fluid distribution in a subterranean reservoir |
| 05/30/2012 | EP2458142A2 Emergency disconnect sequence video capture and playback |
| 05/30/2012 | EP2458138A1 Downhole system having a wireless unit |
| 05/30/2012 | CN202259006U Underground pressure control switch of logging-while-drilling neutron logger |
| 05/30/2012 | CN202250053U Logging device with both storing and remote measuring functions |
| 05/30/2012 | CN202250052U High-sensitivity digital display fishing weight indicator |
| 05/30/2012 | CN202250051U Compression type oil pipe leakage checking switch |
| 05/30/2012 | CN202250050U 32-arm hole-diameter imaging logging tool |
| 05/30/2012 | CN202250049U Graduated ring of multi-arm caliper device |
| 05/30/2012 | CN202250048U Safe draining system |
| 05/30/2012 | CN202250047U Pressure measuring and early warning system for oil well flow |
| 05/30/2012 | CN202250046U Bidirectional extensible hole-sealing pressure-measuring device |
| 05/30/2012 | CN202250045U Automatically-thrown pressure tester |
| 05/30/2012 | CN202250044U Automatic collecting instrument for dynamic liquid level of oil well |
| 05/30/2012 | CN202250043U System for comprehensively detecting drilling depth of all-hydraulic operated drill for coal mine and stroke |
| 05/30/2012 | CN202250042U Drilling parameter detector |
| 05/30/2012 | CN202250041U Intelligent water level monitor |
| 05/30/2012 | CN202250040U High-precision electronic depth sounder for rotary drills |
| 05/30/2012 | CN202250039U Current-loop-based externally-powering measurement while drilling device |
| 05/30/2012 | CN202250038U Acoustic-wave well logging transducer |
| 05/30/2012 | CN202250037U High-temperature-resistant multi-parameter combination logging instrument |
| 05/30/2012 | CN202250036U Wellhead test positioning device |
| 05/30/2012 | CN202250035U Flexible insulating short joint |
| 05/30/2012 | CN202250034U Device for step-by-step measurement of volume of hydraulic oil in underground casing valve |
| 05/30/2012 | CN202250033U Spherical carrier used in tracing quantum dot logging method |
| 05/30/2012 | CN202250032U Water flow logging instrument |
| 05/30/2012 | CN202250031U Foldable flow speed measuring turbine |
| 05/30/2012 | CN202250027U Closed-loop managed pressure drilling system |
| 05/30/2012 | CN202250022U Oil-gas separated metering system |
| 05/30/2012 | CN202249933U Sound source control valve of wellhead connector |
| 05/30/2012 | CN202249914U Bidirectional pressure transmission test sealer |
| 05/30/2012 | CN202249817U Guide apparatus of pipelines for wells |
| 05/30/2012 | CN202249809U Drilling well control pressure test joint |
| 05/30/2012 | CN202249803U Intelligent petroleum drill pipe joint capable of power and signal transmission |
| 05/30/2012 | CN202245880U Double-drum well testing winch |
| 05/30/2012 | CN1932239B Downhole data transmission apparatus and methods |
| 05/30/2012 | CN102482921A 钻杆和对应的钻杆柱 Drill pipe and drill string corresponding |
| 05/30/2012 | CN102477863A 煤层气无压井液面监测装置 CBM no-kill level monitoring device |
| 05/30/2012 | CN102477862A 一种便携式计算机控制采集井下油水界面检测仪的应用 A portable computer to control the acquisition of downhole oil-water interface detector applications |
| 05/30/2012 | CN102477861A 一种复合增效射孔联作测试技术 A complex synergistic Perforation Testing Technology |
| 05/30/2012 | CN102477860A 一种高压油汽井地面测试改进工艺 A high-pressure oil and gas wells ground test process improvements |
| 05/30/2012 | CN102477854A 一种流量测调仪器调节臂的收放方法及其装置 A flow measuring instruments regulating arm retractable transfer method and apparatus |
| 05/30/2012 | CN102477853A 一种在配水器上保证流量测调精度的方法及其装置 A guaranteed water distribution on the accuracy of flow measurement method and apparatus tune |
| 05/30/2012 | CN101819280B Logging instrument three-dimensional data interpolation method |
| 05/30/2012 | CN101476462B Measurement system for engineering geological drilling while drilling |
| 05/30/2012 | CN101351616B Equipment for repairing wellbore and method for improving perforation performance |
| 05/30/2012 | CN101315028B Non-linear temperature compensation method for digital sound wave variable density sonic system |
| 05/30/2012 | CN101294489B Apparatus for testing applied force and displacement of down-hole tubular pile |
| 05/30/2012 | CN101273285B Method and apparatus for transmitting or receiving information between a downhole equipment and surface |
| 05/30/2012 | CN101015147B Downhole telemetry system for wired tubing |
| 05/29/2012 | US8188747 Method for timestamping boring tool locations |
| 05/29/2012 | US8188746 Tracking the positional relationship between a boring tool and at least one buried lines |
| 05/29/2012 | US8186432 Well logging fluid for ultrasonic cement bond logging |
| 05/29/2012 | US8186431 Method of fracturing a subterranean formation at optimized and pre-determined conditions |
| 05/29/2012 | US8186428 Fiber support arrangement for a downhole tool and method |
| 05/29/2012 | US8186212 Shock and vibration environmental recorder for wellbore instruments |
| 05/29/2012 | US8186211 In-borehole gas monitor apparatus and method |
| 05/29/2012 | CA2587897C Heating and cooling electrical components in a downhole operation |
| 05/29/2012 | CA2571788C Drilling wellbores with optimal physical drill string conditions |
| 05/29/2012 | CA2537186C Downhole power generation and communications apparatus and method |
| 05/29/2012 | CA2479406C Downhole tool and method |
| 05/26/2012 | CA2759203A1 Finite element adjustment for basin faults |
| 05/24/2012 | WO2012068219A2 Nuclear magnetic resonance tool with external magnets |
| 05/24/2012 | WO2012068205A2 Method and apparatus for determining the size of a borehole |
| 05/24/2012 | WO2012068119A2 Open-hole logging instrument and method for making ultr-deep magnetic and resistivity measurements |
| 05/24/2012 | WO2012068057A2 Neutron wellbore imaging tool |
| 05/24/2012 | WO2012067611A1 Apparatus and method for drilling a well |
| 05/24/2012 | WO2012066323A2 High temperature downhole gauge system |
| 05/24/2012 | WO2012066309A1 Optical element |