| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 04/27/2011 | CN201810302U Anti-loosening device for anti-loosening circulating sleeve of wireless directional tool |
| 04/27/2011 | CN201810301U Flexible connector |
| 04/27/2011 | CN201810300U Well control emergent rescuing alarm device |
| 04/27/2011 | CN201810299U Horizontal well produced fluid cross section tester |
| 04/27/2011 | CN201810298U Horizontal well liquid production section test device |
| 04/27/2011 | CN201810297U Tangentially polarized monopole transducer of multi-pole acoustic array logging |
| 04/27/2011 | CN201810294U Indoor simulation experiment device for high temperature gas well foaming drainage |
| 04/27/2011 | CN201810287U Balance lifting device |
| 04/27/2011 | CN201810271U Downhole well opening and closing device for directly reading and storing during coal bed methane testing |
| 04/27/2011 | CN201810260U Logging twin packer for cased well perforation interval |
| 04/27/2011 | CN102037212A Drilling wells in compartmentalized reservoirs |
| 04/27/2011 | CN102035387A Logging instrument underground pushing power supply system with on need of cable cores |
| 04/27/2011 | CN102031962A System and method for measuring downhole micro-flow of oil and gas well |
| 04/27/2011 | CN102031961A Borehole temperature measuring probe |
| 04/27/2011 | CN102031960A Method and device for measuring liquid level of oil well |
| 04/27/2011 | CN102031959A Inspection method and device for gas drainage hole |
| 04/27/2011 | CN102031958A Underground instrument maintenance and calibration system |
| 04/27/2011 | CA2684049A1 Infill well methods for sagd well heavy hydrocarbon recovery operations |
| 04/26/2011 | US7932834 Data relay system for instrument and controller attached to a drill string |
| 04/26/2011 | US7931097 Microwave linked laser control system, method, and apparatus for drilling and boring operations |
| 04/26/2011 | US7931096 Adaptive user interface for rock drilling rig |
| 04/26/2011 | US7931081 Systems, methods and apparatuses for monitoring and recovery of petroleum from earth formations |
| 04/26/2011 | CA2638635C Creep determination technique |
| 04/26/2011 | CA2594059C Wellbore surveying system and method |
| 04/21/2011 | WO2011047261A2 Well collision avoidance using distributed acoustic sensing |
| 04/21/2011 | WO2011046859A2 Casing rotary steerable system for drilling |
| 04/21/2011 | WO2011045005A1 Method and apparatus for monitoring cement sheath degradation related to co2 exposure |
| 04/21/2011 | WO2011015824A9 Collision avoidance system with offset wellbore vibration analysis |
| 04/21/2011 | WO2011007229A3 Method and apparatus for wellbore survey using inertial sensors |
| 04/21/2011 | WO2011005829A3 Unequal error protection for embedded coding of borehole images and variable-quality telemetry channels |
| 04/21/2011 | WO2011005436A3 Seismic measurements while drilling |
| 04/21/2011 | WO2010143139A3 Sensor assembly |
| 04/21/2011 | WO2010131113A3 System and method for performing wellsite containment operations |
| 04/21/2011 | US20110088952 Drill Motor Enhancement |
| 04/21/2011 | US20110088947 Process for determining the presence and/or quantity of h2s in subsoil and related apparatus |
| 04/21/2011 | US20110088903 Instrumented disconnecting tubular joint |
| 04/21/2011 | US20110088895 Downhole measurement of formation characteristics while drilling |
| 04/21/2011 | US20110088894 Methods, apparatus and articles of manufacture to measure gas reservoir formation pressures |
| 04/21/2011 | US20110088890 Multiple magnetic sensor ranging method and system |
| 04/21/2011 | US20110088462 Downhole monitoring with distributed acoustic/vibration, strain and/or density sensing |
| 04/21/2011 | CA2814619A1 Well collision avoidance using distributed acoustic sensing |
| 04/20/2011 | EP2312116A2 Casing hanger nesting indicator |
| 04/20/2011 | EP2310628A2 Detecting a structure in a well |
| 04/20/2011 | EP2310627A2 Transducer assemblies for downhole tools |
| 04/20/2011 | EP2310626A2 Method for estimating formation permeability using time lapse measurements |
| 04/20/2011 | EP1812683B1 System and method for wireless communication in a producing well system |
| 04/20/2011 | CN201804344U High-precision engineering logging depth counting system |
| 04/20/2011 | CN201804283U Temperature control box of pressure gage verification device |
| 04/20/2011 | CN201802396U High-temperature salt-resistant double-core dynamic filter press |
| 04/20/2011 | CN201802394U Bolt assembling and disassembling tool of echometer sound generator |
| 04/20/2011 | CN201802393U Directional automatic opening capillary pressure testing device |
| 04/20/2011 | CN201802392U Device and system for measuring water level and depth of gas drilling |
| 04/20/2011 | CN201802391U Rotary-type rope socket for annulus testing |
| 04/20/2011 | CN201802390U Suspension type testing instrument fast connector |
| 04/20/2011 | CN201802389U Movable single-well separate metering sled |
| 04/20/2011 | CN201802388U Offshore drilling multi-parameter monitor |
| 04/20/2011 | CN201802387U Thick film circuit for logging signal ground acquisition and preprocessing |
| 04/20/2011 | CN201802386U Signal detection thick film circuit for micro-resistivity well circumference imaging logger |
| 04/20/2011 | CN201802385U Cable head for rapid connection and disconnection between logging cable and subsurface instrument |
| 04/20/2011 | CN201802384U Skid-mounted multi-pass control device for oilfield metering station |
| 04/20/2011 | CN102027197A Telescopic joint mini control panel |
| 04/20/2011 | CN102022110A Exciting tension assembly test device for pulser |
| 04/20/2011 | CN102022109A Communication line routing device of subsurface equipment |
| 04/20/2011 | CN102022108A Automatic infrasonic wave non-pressure oil well liquid level monitoring instrument |
| 04/20/2011 | CN102022107A Method for establishing physical model capable of predicting waterflooding of fractured anisotropic oil reservoirs |
| 04/20/2011 | CN102022083A Rotary guide well drilling tool |
| 04/20/2011 | CN101196113B Single-emitting five-receiving sonic system virtual two-emitting five-receiving sonic system method |
| 04/19/2011 | US7930148 Spherical calibration and reference alignment algorithms |
| 04/19/2011 | US7926589 Boring tool control using remote locator |
| 04/19/2011 | US7926563 Well jet device for well-logging operations and the operating method thereof |
| 04/19/2011 | CA2674054C Device and method for measuring a property in a downhole apparatus |
| 04/19/2011 | CA2644948C Method and system of controlling drilling direction using directionally sensitive resistivity readings |
| 04/19/2011 | CA2612698C Method and apparatus for acoustic data transmission in a subterranean well |
| 04/19/2011 | CA2416729C Improved logging-while-drilling apparatus and methods for measuring density |
| 04/14/2011 | WO2011044427A2 Automated sidewall coring |
| 04/14/2011 | WO2011044348A2 Current-to-voltage converters with dynamic feedback |
| 04/14/2011 | WO2011044071A2 Cooling apparatus and methods for use with downhole tools |
| 04/14/2011 | WO2011044070A2 Formation testing planning and monitoring |
| 04/14/2011 | WO2011044028A2 Oilfield operation using a drill string |
| 04/14/2011 | WO2011044023A2 System and method for sensing a liquid level |
| 04/14/2011 | WO2011043981A2 System and method for downhole communication |
| 04/14/2011 | WO2011043947A2 Sensor deployment and retrieval system using fluid drag force |
| 04/14/2011 | WO2011043890A2 Formation testing |
| 04/14/2011 | WO2011043851A1 Deep evaluation of resistive anomalies in borehole environments |
| 04/14/2011 | WO2011043768A1 Combination injection string and distributed sensing string |
| 04/14/2011 | WO2011042413A1 System for inspecting a casing |
| 04/14/2011 | WO2011042023A1 A flexible unbonded oil pipe system with an optical fiber sensor inside |
| 04/14/2011 | WO2011008468A3 Pulsed neutron based monitoring of co2 in enhnaced recovery and sequestration projects |
| 04/14/2011 | WO2011007120A3 Methods for contacting a surface with a fluid containing a marker to determine the wettability of the surface |
| 04/14/2011 | WO2010135584A3 Downhole sensor tool with a sealed sensor outsert |
| 04/14/2011 | WO2010115777A3 Method and steering assembly for drilling a borehole in an earth formation |
| 04/14/2011 | WO2010101733A4 Tool for locating and plugging lateral wellbores |
| 04/14/2011 | US20110087434 Monitoring system |
| 04/14/2011 | US20110083856 Sensor deployment and retrieval system using fluid drag force |
| 04/14/2011 | US20110083845 Datacoil™ Downhole Logging System |
| 04/14/2011 | US20110083843 System and method for preparing near-surface heavy oil for extraction using microbial degradation |
| 04/14/2011 | US20110083842 Methods and apparatus for downhole characterization of emulsion stability |
| 04/14/2011 | CA2776579A1 System and method for sensing a liquid level |
| 04/14/2011 | CA2775764A1 A flexible unbonded oil pipe system with an optical fiber sensor inside |
| 04/13/2011 | EP2309259A1 Methods and apparatus for monitoring cement sheath degradation related to CO2 exposure |