| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 04/24/2013 | CN103061739A Tipping bucket flowmeter |
| 04/24/2013 | CN103061682A Single section drill rod for achieving TEM (transverse electromagnetic) wave transmission |
| 04/24/2013 | CN102168550B Borehole ground potential measuring electrode |
| 04/24/2013 | CN102121378B Optical fiber sensor for measuring underground pressure |
| 04/24/2013 | CN102121375B Method for processing digital signal of high-temperature detector bar of continuous inclinometer |
| 04/24/2013 | CN102003174B Simulated experiment device of three-dimension radial flow sieve tube |
| 04/24/2013 | CN101929334B Device and method for monitoring penetration of marine petroleum pipe and pile hammering-in method |
| 04/24/2013 | CN101915090B System and method for monitoring sand production rate of oil-gas well |
| 04/24/2013 | CN101892830B Deep ground stress measurement while drilling (MWD) system |
| 04/24/2013 | CN101881155B Wired measurement and transmission motor for measurement while-drilling instrument |
| 04/24/2013 | CN101876245B Shell of electromagnetic wave resistivity instrument |
| 04/24/2013 | CN101798919B Method for monitoring whether drilling mud is invaded by grouting fluid during drilling and grouting parallel operation |
| 04/24/2013 | CN101581221B Measurement-while-drilling system |
| 04/24/2013 | CN101550822B Method and device for improving accuracy of layered flow rate test by ultrasonic flowmeter used for water injection well in oil fields |
| 04/24/2013 | CN101525999B Adaptability analysis method for electromagnetic measurement while drilling system |
| 04/24/2013 | CN101525996B Leapfrog neutron tube target voltage control method |
| 04/23/2013 | US8427638 Optical measurement device including a multi-component sealing assembly |
| 04/23/2013 | US8427336 Monitoring of undesirable fluid ingress into subsea control modules |
| 04/23/2013 | DE202013001893U1 Vorrichtung zum Einbringen einer mehr als einen Rohrabschnitt umfassenden Erdwärmesonde in das Erdreich Means for introducing a more than a pipe section comprehensive geothermal probe into the soil |
| 04/23/2013 | CA2755402C Downhole data communication |
| 04/19/2013 | CA2792568A1 System and method for gathering, analyzing, managing and sharing ground modification operation data |
| 04/19/2013 | CA2786246A1 Well cellar high fluid level alarm |
| 04/18/2013 | WO2013056152A1 Analysis of drillstring dynamics using a angular rate sensor |
| 04/18/2013 | WO2013055706A1 Wellbore influx detection with drill string distributed measurements |
| 04/18/2013 | WO2013055691A2 Method for real-time monitoring and transmitting hydraulic fracture seismic events to surface using the pilot hole of the treatment well as the monitoring well |
| 04/18/2013 | WO2013055576A1 Apparatus and method for determining the direction east |
| 04/18/2013 | WO2013055566A1 Vibration method to detect onset of gas lock |
| 04/18/2013 | WO2013055465A1 Monitoring structural shape or deformations with helical-core optical fiber |
| 04/18/2013 | WO2013053449A2 Tubular component for drill stem provided with a transmission sheath fixed by threadings, and method for installing said component |
| 04/18/2013 | WO2013052996A1 Formation pressure sensing system |
| 04/18/2013 | WO2013016064A3 System and method for controlling and monitoring a drilling operation using refined solutions from a panistic inversion |
| 04/18/2013 | US20130092440 Boring tool tracking fundamentally based on drill string length, pitch and roll |
| 04/18/2013 | US20130092439 Analysis of Drillstring Dynamics Using an Angular Rate Sensor |
| 04/18/2013 | US20130092438 System and Method for Monitoring and Controlling Underground Drilling |
| 04/18/2013 | US20130092394 Well Screen with Extending Filter |
| 04/18/2013 | US20130092387 Riser Lifecycle Management System, Computer Readable Medium and Program Code |
| 04/18/2013 | US20130092385 Hydraulic control system monitoring apparatus and method |
| 04/18/2013 | US20130092383 Methods and apparatus for subsea well intervention and subsea wellhead retrieval |
| 04/18/2013 | US20130092371 Systems and methods for distributed interferometric accoustic monitoring |
| 04/18/2013 | US20130091944 Systems and methods of determining parameter values in a downhole environment |
| 04/18/2013 | US20130091942 Downhole monitoring with distributed acoustic/vibration, strain and/or density sensing |
| 04/18/2013 | US20130091941 Determination of oil saturation in reservoir rock using paramagnetic nanoparticles and magnetic field |
| 04/18/2013 | US20130091716 Apparatus and Method for Determining the Direction East |
| 04/18/2013 | CA2851874A1 Formation pressure sensing system |
| 04/18/2013 | CA2849922A1 System for real-time monitoring and transmitting hydraulic fracture seismic events to surface using the pilot hole of the treatment well as the monitoring well |
| 04/18/2013 | CA2849768A1 Analysis of drillstring dynamics using a angular rate sensor |
| 04/18/2013 | CA2849317A1 Monitoring structural shape or deformations with helical-core optical fiber |
| 04/17/2013 | EP2580611A1 Method and system of determining a parameter associated with a formation corrected for neutrons produced |
| 04/17/2013 | EP2580476A1 Extracting device having a connecting rod and method for controlling an extracting device having a connecting rod and at least one counterweight |
| 04/17/2013 | EP2580427A1 Multi-window lateral well locator/reentry apparatus and method |
| 04/17/2013 | EP2580425A1 Wellbore screen with tracer for fluid detection |
| 04/17/2013 | EP2580424A1 Wellbore fluid treatment tubular and method |
| 04/17/2013 | CN202887380U Wellhead alarming device for judging whether test instrument enters lubricator |
| 04/17/2013 | CN202882903U Enhancement type compensation neutron logging instrument |
| 04/17/2013 | CN202882902U Enhanced digital sound wave logging instrument |
| 04/17/2013 | CN202882899U Oilfield indicator based on ZigBee wireless sensor network |
| 04/17/2013 | CN202882898U Oil field pressure transmitter with Web of Things application function |
| 04/17/2013 | CN202882897U Downhole data collecting device |
| 04/17/2013 | CN202882896U Portable pumping unit polished rod position indicator |
| 04/17/2013 | CN202882895U Mechanical parameter measuring equipment used for bridge plug setting process |
| 04/17/2013 | CN202882894U Sealed probe pressure measuring device based on parallelogram backup arm mechanism |
| 04/17/2013 | CN202882893U Drilling depth monitoring device for mine |
| 04/17/2013 | CN202882892U Enhancement type well deviation direction logging instrument |
| 04/17/2013 | CN202882891U Well testing anti-stuck device |
| 04/17/2013 | CN202882890U Press cover type bypass for horizontal well |
| 04/17/2013 | CN202882889U Headstall with tension and temperature measurement function |
| 04/17/2013 | CN202882888U Main gun for horizontal well |
| 04/17/2013 | CN202882887U Double-tension-bar type headstall for hydraulic cylinder |
| 04/17/2013 | CN202882886U Turbine flowmeter for liquid production section well logging |
| 04/17/2013 | CN202882885U Oil-gas-water three-phrase flow output section parameter testing device |
| 04/17/2013 | CN202882884U Pumping unit simulation test table |
| 04/17/2013 | CN202882883U Three-parameter logger |
| 04/17/2013 | CN202882882U Enhancement type three-parameter logging instrument |
| 04/17/2013 | CN202882834U Detecting device for oil drilling blowout preventer |
| 04/17/2013 | CN202882786U Wireline log blowout prevention pup joint |
| 04/17/2013 | CN103051140A Sensor commuated electric motor with sensorless angular position determination and method |
| 04/17/2013 | CN103046925A Binomial-based method and binomial-based system for acquiring absolute open-flow potential of condensate gas reservoir |
| 04/17/2013 | CN103046924A Exponential-based method and exponential-based system for acquiring absolute open-flow potential of condensate gas reservoir |
| 04/17/2013 | CN103046922A Temperature measurement technique in well site solid control system |
| 04/17/2013 | CN103046921A Method for testing blocking effects of high-density water-based drilling fluids |
| 04/17/2013 | CN103046920A Sealing insulating mechanism |
| 04/17/2013 | CN103046919A Method for measuring oil well products through liquid levels and differential pressure |
| 04/17/2013 | CN103046918A Method and system for optimizing drilling parameters |
| 04/17/2013 | CN103046868A Integrated horizontal well geosteering method |
| 04/17/2013 | CN102287144B Well pipeline guider |
| 04/17/2013 | CN102206995B System for continuously monitoring temperature and pressure during steam injection and soaking process |
| 04/17/2013 | CN102182447B Double-drum linked main engine for well logging and well testing |
| 04/17/2013 | CN102128026B Formation pressure measuring device while drilling |
| 04/17/2013 | CN102080524B Layered electric ignition method for multilayer gas injection of fire flood |
| 04/17/2013 | CN101906958B Unattended digital multi-well automatic metering device and method |
| 04/17/2013 | CN101899969B Real-time on-site drilling full parameter optimization method |
| 04/16/2013 | US8423337 Method for multi-scale geomechanical model analysis by computer simulation |
| 04/16/2013 | US8418782 Method and system for precise drilling guidance of twin wells |
| 04/16/2013 | US8418546 In-situ fluid compatibility testing using a wireline formation tester |
| 04/16/2013 | CA2677478C Apparatus and methods of flow testing formation zones |
| 04/16/2013 | CA2676459C Method and apparatus for collecting drill bit performance data |
| 04/16/2013 | CA2537558C Systems and methods of downhole thermal property measurement |
| 04/14/2013 | CA2791872A1 Clustering process for analyzing pressure gradient data |
| 04/11/2013 | WO2013052664A2 Production logging in horizontal wells |
| 04/11/2013 | WO2013052423A2 Methods and apparatus having borehole seismic waveform compression |