| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 11/18/2009 | CN101581221A Measurement while drilling system |
| 11/18/2009 | CN101581220A Built-in signal detection sensor for sand production of oil-gas wells |
| 11/18/2009 | CN101581219A Device and method for measurement while drilling of ground stress |
| 11/18/2009 | CN101581218A Device and method for convenient measurement while drilling of coal bed gas parameters |
| 11/18/2009 | CN101581217A Device and method for coal bed gas pressure/content measurement while drilling |
| 11/18/2009 | CN101581216A Driving depth calculation and control methods of large-size pipe shared by three bunchy wells |
| 11/18/2009 | CN101581215A Collector capable of automatically controlling gas separation for measuring production profile of oil well |
| 11/18/2009 | CN101581214A Transient electromagnetic logging device in through-casing well |
| 11/18/2009 | CN101581207A Electric water distribution measurement and adjustment instrument of single-layer shunt detection |
| 11/18/2009 | CN100560931C Oil well electric pump separate-extraction intelligent joint |
| 11/17/2009 | US7617873 System and methods using fiber optics in coiled tubing |
| 11/17/2009 | CA2549588C Composite encased tool for subsurface measurements |
| 11/17/2009 | CA2522679C Mapping fracture dimensions |
| 11/12/2009 | WO2009137826A2 Mass/volume estimation contamination, removal and/or in situ treatment using subsurface pressure waves |
| 11/12/2009 | WO2009137565A1 Analysis of radar ranging data from a down hole radar ranging tool for determining width, height, and length of a subterranean fracture |
| 11/12/2009 | WO2009108889A3 Composite transducer for downhole ultrasonic imaging and caliper measurement |
| 11/12/2009 | WO2009108254A3 Apparatus and method for sampling downhole fluids |
| 11/12/2009 | WO2009102526A3 Methods for the identification of bubble point pressure |
| 11/12/2009 | WO2009017900A3 Apparatus and method for wirelessly communicating data between a well and the surface |
| 11/12/2009 | WO2008152599A3 Real time closed loop interpretation of tubing treatment systems and methods |
| 11/12/2009 | WO2008132415A9 Device for protecting a geotechnical or geophysical probe |
| 11/12/2009 | US20090278569 Semiconductor Device and its Manufacturing Method, Semiconductor Manufacturing Mask, and Optical Proximity Processing Method |
| 11/12/2009 | US20090277844 Mass/Volume Estimation of Contamination, Removal and/or in situ Treatment Using Subsurface Pressure Waves |
| 11/12/2009 | US20090277644 Method and apparatus for christmas tree condition monitoring |
| 11/12/2009 | US20090277631 Rotator for wireline conveyed wellbore instruments and method for rotating an instrument in a wellbore |
| 11/12/2009 | US20090277630 Analysis of radar ranging data from a down hole radar ranging tool for determining width, height, and length of a subterranean fracture |
| 11/12/2009 | US20090277629 Acoustic and Fiber Optic Network for Use in Laterals Downhole |
| 11/12/2009 | US20090277628 Electric submersible pumping sensor device and method |
| 11/12/2009 | DE102008001439A1 Probe determining integrity of annular borehole seals, includes ionizing radiation source and instrument detecting backscattered radiation |
| 11/12/2009 | CA2722690A1 Analysis of radar ranging data from a down hole radar ranging tool for determining width, height, and length of a subterranean fracture |
| 11/11/2009 | EP2116690A1 Geochemical surveillance of gas production from tight gas fields |
| 11/11/2009 | EP2115270A1 Determining fluid rate and phase information for a hydrocarbon well using predictive models |
| 11/11/2009 | CN201344031Y Injection well anti-freezing pressure recording device |
| 11/11/2009 | CN101575969A Method for measuring pressure of coalbed gas |
| 11/11/2009 | CN101575956A Concentric integral water detecting and plugging pipe column |
| 11/10/2009 | US7617052 Ultrasonic estimating method and apparatus for a cased well |
| 11/10/2009 | US7614452 Flow reversing apparatus and methods of use |
| 11/10/2009 | US7614296 Method and device for fluid flow parameters determination |
| 11/10/2009 | US7614278 Blast movement monitor |
| 11/10/2009 | CA2371085C A drillpipe assembly and a method of deploying a logging tool |
| 11/05/2009 | WO2009135172A2 Method and system for annular region evaluation in sequestration wells |
| 11/05/2009 | WO2009135157A2 Adaptive drilling control system |
| 11/05/2009 | WO2009134842A2 Steerable bit |
| 11/05/2009 | WO2009134669A2 Hydrocarbon recovery testing method |
| 11/05/2009 | WO2009134578A2 Drilling system with drill string valves |
| 11/05/2009 | WO2009134158A1 Method for monitoring flood front movement during flooding of subsurface formations |
| 11/05/2009 | WO2009133375A2 Downhole tool |
| 11/05/2009 | WO2009091763A4 Method and apparatus for estimating a downhole fluid property |
| 11/05/2009 | WO2009085615A9 Borehole imaging and orientation of downhole tools |
| 11/05/2009 | WO2009039468A8 Adaptive borehole corrections accounting for eccentricity for array laterlogs |
| 11/05/2009 | US20090276100 System, program product, and related methods for performing automated real-time reservoir pressure estimation enabling optimized injection and production strategies |
| 11/05/2009 | US20090276094 Apparatus And Method For An Autonomous Robotic System For Performing Activities In A Well |
| 11/05/2009 | US20090272578 Dual motor systems and non-rotating sensors for use in developing wellbores in subsurface formations |
| 11/05/2009 | US20090272531 Hydrocarbon recovery testing method |
| 11/05/2009 | US20090272530 Annular region evaluation in sequestration wells |
| 11/05/2009 | US20090272527 Method and Apparatus for Perforating a Casing and Producing Hydrocarbons |
| 11/05/2009 | CA2722838A1 Method for monitoring flood front movement during flooding of subsurface formations |
| 11/03/2009 | US7610960 Depth correlation device for fiber optic line |
| 11/03/2009 | CA2537333C Expandable tubulars for use in a wellbore |
| 11/03/2009 | CA2473191C Electrical connector useful in wet environments |
| 11/03/2009 | CA2401707C Electro-hydraulically pressurized downhole valve actuator |
| 10/29/2009 | WO2009132281A1 System and method for health assessment of downhole tools |
| 10/29/2009 | WO2009132159A2 Position indicator for drilling tool |
| 10/29/2009 | WO2009131970A1 Fiber reinforced pressure compensator diaphragm |
| 10/29/2009 | WO2009131877A2 Methods of inferring flow in wellbore |
| 10/29/2009 | WO2009102218A3 Method and device for position control of a working organ of a down-hole actuator |
| 10/29/2009 | WO2009091914A3 Identification of stress in formations using angles of fast and slow dipole waves in borehole acoustic logging |
| 10/29/2009 | WO2009077718A3 Oilfield area network communication system and method |
| 10/29/2009 | US20090271233 Valuing future information under uncertainty |
| 10/29/2009 | US20090267791 Intelligent efficient servo-actuator for a downhole pulser |
| 10/29/2009 | US20090266611 Position indicator for drilling tool |
| 10/29/2009 | US20090266610 Determination of azimuthal offset and radius of curvature in a deviated borehole using periodic drill string torque measurements |
| 10/29/2009 | US20090266544 Signal operated tools for milling, drilling, and/or fishing operations |
| 10/29/2009 | US20090266538 Method of modelling enhanced recovery by polymer injection |
| 10/29/2009 | US20090266537 Combination injection string and distributed sensing string for well evaluation and treatment control |
| 10/29/2009 | US20090266536 System and Method for Sensing Flow Rate and Specific Gravity within a Wellbore |
| 10/29/2009 | US20090266533 System for determining sealing in a wellbore |
| 10/29/2009 | US20090266532 Wellbore Tool for Filling, Circulating and Backflowing Fluids |
| 10/29/2009 | US20090266155 Apparatus and Method for Fluid Flow Measurement with Sensor Shielding |
| 10/29/2009 | US20090266154 In-borehole gas monitor apparatus and method |
| 10/29/2009 | CA2721956A1 Position indicator for drilling tool |
| 10/28/2009 | EP2112325A1 Modelling method for assisted recovery by polymer injection |
| 10/28/2009 | CN101566060A Pressure detection device used for instruction issue in drilling operation |
| 10/27/2009 | USRE40944 Adjustable shear valve mud pulser and controls therefor |
| 10/27/2009 | US7607494 Earth penetrating apparatus and method employing radar imaging and rate sensing |
| 10/27/2009 | US7607478 Intervention tool with operational parameter sensors |
| 10/27/2009 | CA2375080C Method of utilizing flowable devices in wellbores |
| 10/25/2009 | CA2664713A1 Method for modeling recovery assisted by polymer injection |
| 10/23/2009 | CA2658539A1 System and method for deploying optical fiber |
| 10/22/2009 | WO2009129461A2 System and method for improved depth measurement correction |
| 10/22/2009 | WO2009129386A2 Steering device for downhole tools |
| 10/22/2009 | WO2009129240A2 Selective zonal testing using a coiled tubing deployed submersible pump |
| 10/22/2009 | WO2009129229A1 Real time formation pressure test and pressure integrity test |
| 10/22/2009 | WO2009129216A2 Real time formation pressure test and pressure integrity |
| 10/22/2009 | WO2009129128A1 Tool and method for determining formation parameter |
| 10/22/2009 | WO2009129027A2 Downlink while pumps are off |
| 10/22/2009 | WO2009128990A2 Magnetic ranging whle drilling using an electric dipole source and a magnetic field sensor |
| 10/22/2009 | WO2009128989A1 Method for drilling wells in close relationship using magnetic ranging while drilling |
| 10/22/2009 | WO2009127328A1 Method and apparatus for measuring return flow in a well |
| 10/22/2009 | WO2009103058A3 Down hole mud sound speed measure by using acoustic sensors with differentiated standoff |