| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
|---|
| 08/08/2012 | CN202370474U Test device for simulating displacement efficiency of well-cementing cement slurry |
| 08/08/2012 | CN202370470U Wellhead anti-falling device for tester |
| 08/08/2012 | CN1975106B Wireless electromagnetic telemetry system and method for bottomhole assembly |
| 08/08/2012 | CN102628360A Determination method for longitudinal resolution index of drilling electromagnetic wave resistivity instrument |
| 08/08/2012 | CN102628358A Well logging method |
| 08/08/2012 | CN102628356A Method for restraining temperature monitoring noise of heavy oil thermal recovery well |
| 08/08/2012 | CN102628355A Cable-free borehole clinometer and synchronous inclinometry method thereof based on synchronization technology |
| 08/08/2012 | CN102628354A Pore micron-sized oil water distribution recognition and quantification method |
| 08/08/2012 | CN102628351A Experimental device and method for thick oil water thermal-catalytic cracking under effect of low frequency vibration waves |
| 08/08/2012 | CN102627244A Underground electric jack boosted by liquid pressure through cable line operation |
| 08/08/2012 | CN101957252B Experiment device for detecting sealing performance of swelling capsule and sealing liquid |
| 08/07/2012 | US8237920 In situ optical computation fluid analysis system and method |
| 08/07/2012 | US8237585 Wireless communication system and method |
| 08/07/2012 | US8237584 Changing communication priorities for downhole LWD/MWD applications |
| 08/07/2012 | US8235144 Expansion and sensing tool |
| 08/07/2012 | US8235127 Communicating electrical energy with an electrical device in a well |
| 08/07/2012 | US8235110 Preconditioning an oilfield reservoir |
| 08/07/2012 | US8235075 Method and apparatus for patching a well by hydroforming a tubular metal patch, and a patch for this purpose |
| 08/07/2012 | CA2668533C Downhole anchoring tools conveyed by non-rigid carriers |
| 08/07/2012 | CA2642713C Drilling apparatus and method |
| 08/07/2012 | CA2562217C Methods and apparatus for measuring flow velocity in a wellbore using nmr and applications using same |
| 08/02/2012 | WO2012103474A2 Improving diversion by combining dissolvable and degradable particles and fibers |
| 08/02/2012 | WO2012103063A2 Apparatus and method for predicting vertical stress fields |
| 08/02/2012 | WO2012103062A2 Method and apparatus for transmitting a dataset from a tool to a receiver |
| 08/02/2012 | WO2012065123A3 Remote operation of cementing head |
| 08/02/2012 | WO2012064728A3 Sensor on a drilling apparatus |
| 08/02/2012 | WO2012060974A3 An intergrated source-free method and apparatus for porosity determination: nmr calibrated acoustic porosity |
| 08/02/2012 | WO2012058296A3 Downhole tool deployment measurement method and apparatus |
| 08/02/2012 | WO2012051184A3 Predicting downhole formation volumetric sand production using grain-scale rock models |
| 08/02/2012 | US20120193144 Magnetic ranging system for controlling a drilling process |
| 08/02/2012 | US20120193092 Apparatus and methods for tracking the location of fracturing fluid in a subterranean formation |
| 08/02/2012 | US20120193091 Plunger lift control system arrangement |
| 08/02/2012 | US20120193090 Downhole sensor assembly |
| 08/02/2012 | CA2825471A1 Method and apparatus for transmitting a dataset from a tool to a receiver |
| 08/02/2012 | CA2825219A1 Improving diversion by combining dissolvable and degradable particles and fibers |
| 08/02/2012 | CA2822361A1 Electrical methods fracture detection via 4d techniques |
| 08/01/2012 | EP2480759A1 Seismic source which incorporates earth coupling as part of the transmitter resonance |
| 08/01/2012 | EP2480758A2 Method and apparatus for determining locations of multiple casings within a wellbore conductor |
| 08/01/2012 | EP2480757A2 System and method for monitoring and controlling wellbore parameters |
| 08/01/2012 | EP2480756A2 Method for controlling fluid production from a wellbore by using a script |
| 08/01/2012 | EP2480745A2 A method and apparatus for communicating with a device located in a borehole |
| 08/01/2012 | EP1815101B1 Methods and apparatus for drilling, completing and configuring u-tube boreholes |
| 08/01/2012 | CN202360088U A wired while-drilling slip ring |
| 08/01/2012 | CN202360087U Scale device of multi-arm caliper device |
| 08/01/2012 | CN202360086U Protection structure for gas-liquid separator instrument |
| 08/01/2012 | CN202360085U Distance-adjustable downhole instrument connector suitable for drill collar connection |
| 08/01/2012 | CN202360084U Automatic safety protection device of hydraulic dynamometer |
| 08/01/2012 | CN202360083U Detecting device for internal corrosion and scale formation of water injection string of oilfield water injection well |
| 08/01/2012 | CN202360082U LaBr3(Ce) crystal-based multi-channel gamma energy spectrum logging instrument |
| 08/01/2012 | CN102619505A Ground calibration device of instrument for electromagnetic resistivity logging while drilling |
| 08/01/2012 | CN102619504A Method for determining radial detection depth index of electromagnetic wave resistivity instrument while drilling |
| 08/01/2012 | CN102619501A Data transmission system in petroleum logging instrument |
| 08/01/2012 | CN102619500A Power and signal transmission drill stem cable inlet device |
| 08/01/2012 | CN102619499A Method for monitoring distribution of coal underground gasification temperature zones |
| 08/01/2012 | CN102619470A Method for controlling transverse vibration of drill string in process of reaming while drilling |
| 08/01/2012 | CN101737012B Drilling bit for guiding horizontal roatatably-jetting construction and construction method thereof |
| 08/01/2012 | CA2740664A1 Apparatus for connecting downhole tools to a wireline |
| 07/31/2012 | US8234072 Methods of identifying high neutron capture cross section doped proppant in induced subterranean formation fractures |
| 07/31/2012 | US8230947 Method of selecting a drilling motor for a casing drill string |
| 07/31/2012 | US8230922 Enhanced oil recovery by polymer without supplementary equipment or product |
| 07/31/2012 | US8230919 Well thermal insulation for formation sampling of viscous fluids and methods of use thereof |
| 07/31/2012 | US8230917 Methods and systems for determination of fluid invasion in reservoir zones |
| 07/31/2012 | US8230915 Apparatus, system, and method for determining injected fluid vertical placement |
| 07/31/2012 | US8230732 Fluid flow measuring device and method |
| 07/31/2012 | US8230731 System and method for determining incursion of water in a well |
| 07/31/2012 | CA2570628C Casing resonant radial flexural modes in cement bond evaluation |
| 07/28/2012 | CA2815877A1 Magnetic ranging method and apparatus |
| 07/26/2012 | WO2012100259A2 Telemetry operated circulation sub |
| 07/26/2012 | WO2012100242A2 Downhole sand control apparatus and method with tool position sensor |
| 07/26/2012 | WO2012097416A1 Incorporation and use of a position sensor in a metal detector |
| 07/26/2012 | WO2012064406A3 Method and system for pulse neutron capture sigma inversion |
| 07/26/2012 | WO2012054496A3 Erosion tracer and monitoring system and methodology |
| 07/26/2012 | US20120188846 Method and apparatus for packaging surface acoustic wave transponder for down-hole tools |
| 07/26/2012 | US20120186874 Downhole sand control apparatus and method with tool position sensor |
| 07/26/2012 | US20120186809 Downhole 4D Pressure Measurement Apparatus And Method For Permeability Characterization |
| 07/26/2012 | US20120186335 Imaging subsurface formations while wellbore drilling using beam steering for improved image resolution |
| 07/26/2012 | CA2824764A1 Downhole sand control apparatus and method with tool position sensor |
| 07/26/2012 | CA2824522A1 Telemetry operated circulation sub |
| 07/26/2012 | CA2760529A1 Visualizing fluid flow in subsurface reservoirs |
| 07/25/2012 | EP2478184A1 Downhole measurement apparatus |
| 07/25/2012 | EP2478183A2 Monitoring drilling performance in a sub-based unit |
| 07/25/2012 | CN202348276U Automatic alarm for oil gas detection |
| 07/25/2012 | CN202348272U Battery power supply type high-temperature pulse generator |
| 07/25/2012 | CN202348271U Double-induction 8-lateral logger |
| 07/25/2012 | CN202348270U Anti-theft rapid pressure measuring device |
| 07/25/2012 | CN202348269U Pressure testing device for oil well casing pipe string |
| 07/25/2012 | CN202348268U High-precision fracturing electronic pressure gauge |
| 07/25/2012 | CN202348267U Dual-purpose high-accuracy depth correction type underground tester and system |
| 07/25/2012 | CN202348266U Minitype mud floating type electronic pressure gage and pressure measurement device |
| 07/25/2012 | CN202348265U Rain cover for encoder |
| 07/25/2012 | CN202348264U Fastening structure of ultrasonic transducer |
| 07/25/2012 | CN202348263U Optical fiber Bragg grating sensing monitoring system of oil and gas well |
| 07/25/2012 | CN202348262U Well-logging shock-absorption quick joint and matched joint thereof |
| 07/25/2012 | CN202348261U Erosion detecting device for gas drilling sand-discharging pipeline |
| 07/25/2012 | CN202348260U Oilfield logging instrument data acquisition device |
| 07/25/2012 | CN202348259U Supercritical carbon dioxide well bore multi-phase flow simulation test device |
| 07/25/2012 | CN202348258U Gas-liquid separation and oil, water and gas three-phase measurement device |
| 07/25/2012 | CN202348257U Lithology detection system for drilled hole with ultra-small caliber |
| 07/25/2012 | CN202348256U Balancing instrument for angle difference measurement of wireless while-drilling measuring instrument |
| 07/25/2012 | CN202348255U Frame-type calibration device of double-attitude induction logging instrument |