| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 06/03/2011 | WO2011066302A2 Drilling assembly with a steering unit integrated in drilling motor |
| 06/03/2011 | WO2011066188A1 System and method for measurement incorporating a crystal oscillator |
| 06/03/2011 | WO2011043890A3 Formation testing |
| 06/03/2011 | WO2011028625A3 System and method for communicating data between wellbore instruments and surface devices |
| 06/03/2011 | WO2011028375A3 Fiber optic inner string position sensor system |
| 06/03/2011 | WO2010109340A3 Method, apparatus and system for a supervisory system for carbon sequestration |
| 06/03/2011 | WO2009080711A3 Method for producing hydrocarbons through a well or well cluster of which the trajectory is optimized by a trajectory optimisation algorithm |
| 06/03/2011 | WO2009021010A3 System and method for stress field based wellbore steering |
| 06/03/2011 | CA2782070A1 System and method for measurement incorporating a crystal oscillator |
| 06/02/2011 | US20110130965 Fracture testing apparatus and method |
| 06/02/2011 | US20110127035 Method of abandoning a petroleum well |
| 06/02/2011 | US20110127032 Method for monitoring hydrocarbon production |
| 06/01/2011 | EP2328305A1 Communications system for an underwater fluid extraction facility |
| 06/01/2011 | EP2327857A1 Drilling tool and method for widening and simultaneously monitoring the diameter of wells and the properties of the fluid |
| 06/01/2011 | EP2326795A2 Determining characteristics of a subterranean body using pressure data and seismic data |
| 06/01/2011 | EP1188265B1 Method and apparatus for determining position in a pipe |
| 06/01/2011 | CN201851115U Simulation box for heterogeneous reservoir |
| 06/01/2011 | CN201851114U Test kit with probe tube |
| 06/01/2011 | CN201851113U Measuring and transmitting device for bottom-hole pressure, temperature, well deviation and azimuth data |
| 06/01/2011 | CN201851112U Automatic hole-sealing gas pressure measuring and recording system for coal seams |
| 06/01/2011 | CN201851111U Winch sensor used for wireless transmission of oil log |
| 06/01/2011 | CN201851110U Four-in-one sensor |
| 06/01/2011 | CN201851109U Underground magnetic field detecting device |
| 06/01/2011 | CN201851108U Magnetic source generator |
| 06/01/2011 | CN201851107U Telescoping ram |
| 06/01/2011 | CN201851106U Probe tube type formation gamma measurement-while-drilling (MWD) system |
| 06/01/2011 | CN201851105U Oil well tester |
| 06/01/2011 | CN201851102U Drilling pressure and torque measuring-transmitting device |
| 06/01/2011 | CN201851066U Foldable well-testing blowout-prevention pipe |
| 06/01/2011 | CN201851028U Cable head for connecting logging cable and downhole tool |
| 06/01/2011 | CN1828012B System and method of downhole thermal property measurement |
| 06/01/2011 | CN1791731B Systems and methods using a continuously variable transmission to control one or more system components |
| 06/01/2011 | CN102080538A Neutron emission control method, device and short joint for while-drilling neutron porosity measurement |
| 06/01/2011 | CN102080537A Method and system for determining liquid-vapor interface between double horizontal SAGD (Steam Assisted Gravity Drainage) reservoir wells |
| 06/01/2011 | CN102080536A Test method and device of working fluid level of oil well |
| 06/01/2011 | CN102080535A Gyroscopic well-trace tester |
| 06/01/2011 | CN102080534A Speed oil filling device for pulse generator of wireless inclinometer and using method thereof |
| 06/01/2011 | CN102080533A Novel flow sensor module |
| 06/01/2011 | CN102080532A Flow-concentrating flowmeter for downhole steam measurement |
| 06/01/2011 | CN102080531A Method for production metering of oil wells |
| 06/01/2011 | CN102080526A Method for extracting gas from bedding level fractured well of ground coal seam roof |
| 06/01/2011 | CN102080524A Layered electric ignition method for multilayer gas injection of fire flood |
| 06/01/2011 | CN102080503A Continuous directional coring and deflecting machine tool with dual tubes for outer guiding and inner drilling and deflecting method thereof |
| 06/01/2011 | CN101725342B Hollow cable type directed water conveying device |
| 06/01/2011 | CN101291151B Coding and decoding method for down-hole information transmission |
| 05/31/2011 | US7950473 Non-azimuthal and azimuthal formation evaluation measurement in a slowly rotating housing |
| 05/31/2011 | US7950472 Downhole local mud weight measurement near bit |
| 05/31/2011 | US7950451 Annulus mud flow rate measurement while drilling and use thereof to detect well dysfunction |
| 05/31/2011 | CA2704917C Probablistic imaging with azimuthally sensitive mwd/lwd sensors |
| 05/31/2011 | CA2647581C Pressure communication assembly external to casing with connectivity to pressure source |
| 05/31/2011 | CA2451632C System and method for processing and transmitting information from measurements made while drilling |
| 05/26/2011 | WO2011063023A2 Determination of oil saturation in reservoir rock using paramagnetic nanoparticles and magnetic field |
| 05/26/2011 | WO2011062474A1 Enhanced dynamic well model for reservoir pressure determination |
| 05/26/2011 | WO2011060494A1 System for analysing gas from strata being drilled under high mud flows |
| 05/26/2011 | WO2011038170A3 Downhole optical imaging tools and methods |
| 05/26/2011 | WO2011031481A3 Apparatus and methods for controlling bottomhole assembly temperature during a pause in drilling boreholes |
| 05/26/2011 | WO2011031480A3 Method and apparatus for controlling bottomhole temperature in deviated wells |
| 05/26/2011 | WO2011022476A3 Optical telemetry network |
| 05/26/2011 | WO2011020017A3 Method of measuring multi-phase fluid flow downhole |
| 05/26/2011 | WO2009117504A3 Management of measurement data being applied to reservoir models |
| 05/26/2011 | US20110122727 Detecting acoustic signals from a well system |
| 05/26/2011 | US20110120703 Method and system for monitoring the incursion of particulate material into a well casing within hydrocarbon bearing formations including gas hydrates |
| 05/26/2011 | US20110120702 Generating probabilistic information on subterranean fractures |
| 05/26/2011 | US20110120701 Stress Relief in a Pocket of a Downhole Tool String Component |
| 05/26/2011 | US20110120217 High pressure fracture tester |
| 05/26/2011 | CA2781548A1 System for analysing gas from strata being drilled under high mud flows |
| 05/25/2011 | EP2324198A2 Downhole communication |
| 05/25/2011 | EP2324197A1 Down-hole liquid level control for hydrocarbon wells |
| 05/25/2011 | CN201845874U Omnidirectional radiation antenna for underground wireless communication |
| 05/25/2011 | CN201843607U Trip resistance reducer for oil-well instrument |
| 05/25/2011 | CN201843606U Communication cable supporting-hanging structure applicable to drill rod stand column |
| 05/25/2011 | CN201843605U Split piston of oil logging tool |
| 05/25/2011 | CN201843604U Baffle plate type gas flowmeter |
| 05/25/2011 | CN201843603U Flexible connector for logging while drilling apparatus |
| 05/25/2011 | CN201843601U Magnetic position-pulse acidification deblocking device for oil-water well |
| 05/25/2011 | CN201843592U Oil-gas well perforation ground dynamic simulation tester |
| 05/25/2011 | CN102077120A Well log correlation |
| 05/25/2011 | CN102076931A Bottom-hole assembly, and method and system for transmitting data from bottom-hole assembly |
| 05/25/2011 | CN102071962A Method for sealing downward hole |
| 05/25/2011 | CN102071961A Downward gas drainage drill hole and pressure testing drill hole sealing method |
| 05/25/2011 | CN102071932A Acoustic system structure of acoustic velocity-segmented cement bond logging tool and logging method |
| 05/25/2011 | CN102071927A Piezoelectric ceramic electro-acoustic transducer with cylindrical ring structure |
| 05/25/2011 | CN102071926A Method and device for measuring full-hole annular pressure and method and device for controlling same |
| 05/25/2011 | CN102071925A Method for tracking, positioning, quantifying and rectifying coordinate of reversed pendulum hole |
| 05/25/2011 | CN102071924A Omnibearing continuous measurement method of gyroscopic clinometer |
| 05/25/2011 | CN101255791B Apparatus for measuring flow of oil gas water multiphase flow |
| 05/24/2011 | US7948395 Downhole transmission system comprising a coaxial capacitor |
| 05/24/2011 | US7946350 System and method for deploying optical fiber |
| 05/24/2011 | US7946341 Systems and methods for distributed interferometric acoustic monitoring |
| 05/24/2011 | CA2625102C Apparatus and method for detecting fluid entering a wellbore |
| 05/24/2011 | CA2574336C Real-time production-side monitoring and control for heat assisted fluid recovery applications |
| 05/24/2011 | CA2482943C Means and method for assessing the geometry of a subterranean fracture during or after a hydraulic fracturing treatment |
| 05/24/2011 | CA2477904C Accoustical apparatus and method for measuring water level in a ground water well |
| 05/19/2011 | WO2011059342A2 Device and method for attaching an id-marker to a production pipe |
| 05/19/2011 | WO2011058324A1 Use of micro-electro-mechanical systems (mems) in well treatments |
| 05/19/2011 | WO2011057319A1 Laser alignment device for use with a drill rig |
| 05/19/2011 | WO2011038250A3 Apparatus and method for predicting vertical stress fields |
| 05/19/2011 | WO2011036471A3 A method and apparatus for communicating with a device located in a borehole |
| 05/19/2011 | WO2011035089A3 Oilfield optical data transmission assembly joint |
| 05/19/2011 | WO2011028573A3 Reduced wear position indicating subterranean tool |