Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 47 - Survey of boreholes or wells
Patents for E21B 47 - Survey of boreholes or wells (31,352)
10/2012
10/17/2012CN102733791A Coal bed gas drilling monitoring device
10/17/2012CN102733773A Lead impression wear bushing
10/17/2012CN102354501B Unidirectional echo and noise suppression method used in drill string acoustic transmission technology
10/17/2012CN101929973B Quantitative calculation method for hydrocarbon saturation of fractured reservoir
10/17/2012CN101581219B Device and method for measurement while drilling of ground stress
10/17/2012CN101550826B Machinery wireless well deviation measurement instrument while drilling
10/17/2012CN101525997B Downhole signal transmitting device for electromagnetic measurement while drilling system and transmitting method thereof
10/17/2012CN101408104B High fidelity simulating stratum well-drilling leakage-plugging evaluation experimental system
10/16/2012US8290711 Method of estimating the fracture density in a rock medium
10/16/2012US8286708 Methods and apparatuses for installing lateral wells
10/16/2012US8286476 Downhole 4D pressure measurement apparatus and method for permeability characterization
10/16/2012US8286475 Transducer assemblies for downhole tools
10/16/2012CA2622717C Method and apparatus for communicating signals to an instrument in a wellbore
10/16/2012CA2603362C Method for improving drilling depth measurements
10/16/2012CA2592880C Automated well bore compensation control system
10/14/2012CA2774319A1 Assembly for actuating a downhole tool
10/11/2012WO2012138349A1 Automatic standpipe pressure control in drilling
10/11/2012WO2012136304A1 Pressure probe for detecting clathrates and the use thereof
10/11/2012WO2012135963A1 Method and apparatus for determining orientation using a plurality of angular rate sensors and accelerometers
10/11/2012WO2012100242A3 Downhole sand control apparatus and method with tool position sensor
10/11/2012WO2012082774A3 System and method for downhole communication
10/11/2012US20120256759 System and Method for Downhole Telemetry
10/11/2012US20120255780 Method and apparatus for calculating and correcting for directional drilling tool face offsets
10/11/2012US20120255727 Apparatus and Method For Testing Solids Production In A Wellbore
10/11/2012US20120255351 Series configured variable flow restrictors for use in a subterranean well
10/11/2012CA2832381A1 Method and apparatus for determining orientation using a plurality of angular rate sensors and accelerometers
10/11/2012CA2827935A1 Automatic standpipe pressure control in drilling
10/10/2012EP2508708A1 Method of completing a well
10/10/2012EP2508707A1 Monitoring the phase composition of production fluid from a hydrocarbon extraction well
10/10/2012EP2507607A1 Quartz pressure and temperature transducer assembly with dynamic correction
10/10/2012EP2507606A1 System and method for measurement incorporating a crystal oscillator
10/10/2012EP2507478A2 Method ans apparatus for in-situ wellbore measurement and control with inductive connectivity
10/10/2012EP2507477A2 Tool service life sensor with wireless connectivity
10/10/2012EP2507476A2 Flow measurements in an oil reservoir
10/10/2012CN202483567U Storage type geostress test device
10/10/2012CN202483566U High temperature small-hole well testing system
10/10/2012CN202483565U Pressurized short section of negative impulse measurement apparatus while drilling
10/10/2012CN202483564U Direct circulation water pressure test device of negative pulse device
10/10/2012CN202483563U Sensor and oil pipe structure
10/10/2012CN202483562U Intelligent digital display recording device for liquid indicator of oil measuring separator
10/10/2012CN202483561U Coal-bed gas well liquid level monitoring system based on optical fiber sensing
10/10/2012CN202483560U Four-channel winch sensor
10/10/2012CN202483559U Multi-sensor inclinometer orientation module
10/10/2012CN202483558U Omni-bearing drill core director
10/10/2012CN202483557U Ground interface box of wireless while-drilling clinometer
10/10/2012CN202483556U Positive pulse driver for wireless inclinometer while drilling system
10/10/2012CN202483555U Underground test instrument hanger
10/10/2012CN202483554U Oil well produced-fluid optical fiber measuring system
10/10/2012CN202483553U Low gas measure system
10/10/2012CN202483552U Skid-mounted metering device
10/10/2012CN202483551U Wellhead crude oil output metering device
10/10/2012CN202483550U Multi-arm spring type roller centralizer
10/10/2012CN202483548U Oil measuring separator
10/10/2012CN202483489U Feeding device of wireless measurement-while-drilling inclinometer
10/10/2012CN202483436U Non-cavern butting and communicating exploitation system
10/10/2012CN102725479A Methods for characterization of formations, navigating drill paths, and placing wells in earth boreholes
10/10/2012CN102725477A Determining methane content of a bottom sample
10/10/2012CN102720895A Directional well wired skew cable export device
10/10/2012CN102720893A Directional well wired skew cable fixing anti-collision device
10/10/2012CN102720487A System for acquiring gas reservoir formation pressure and method thereof
10/10/2012CN102720485A Prediction method of water cut increasing rate of water field with medium-high water content
10/10/2012CN102720484A While-drilling acoustic well-logging apparatus and well-logging method
10/10/2012CN102720483A New method for measuring liquid level of oilwell
10/10/2012CN102720482A Vibration monitoring system of high-temperature and high-pressure high-flow rate pipeline
10/10/2012CN102720481A Oil-gas migration and accumulation physical simulation experiment apparatus
10/10/2012CN102720480A Liquid-gas separation meter for oil well
10/10/2012CN102720479A Physical simulation device for gas-cap reservoir
10/10/2012CN102720478A Multi-terminal parameter monitoring system for coal mine underground tunnel drilling rig
10/10/2012CN102720477A Wheeled telescopic continuous creeping tractor used for horizontal well
10/10/2012CN102720476A O-shaped well physical simulation experiment device
10/10/2012CN101598014B Perforation simulated target device for high temperature and high pressure laboratory
10/10/2012CN101408102B Total hydrocarbon intelligent logging system
10/09/2012US8284075 Apparatus and methods for self-powered communication and sensor network
10/09/2012US8284074 Method of determination of a stuck point in drill pipes by measuring the magnetic permeability of pipes
10/09/2012US8284073 Downlink while pumps are off
10/09/2012US8283173 Process utilizing natural carbon-13 isotope for identification of early breakthrough of injection water in oil wells
10/09/2012US8281853 Tool for use in well monitoring
10/09/2012CA2668535C Downhole anchoring tools conveyed by non-rigid carriers
10/07/2012CA2773950A1 Electrode system and sensor for an electrically enhanced underground process
10/07/2012CA2736837A1 Method and apparatus for calculating and correcting for directional drilling tool face offsets
10/04/2012WO2012135803A2 Method of directional resistivity logging
10/04/2012WO2012135607A2 Apparatus and method for formation resistivity measurements in oil-based mud using a floating reference signal
10/04/2012WO2012135606A2 Formation resistivity measurements using phase controlled currents
10/04/2012WO2012135604A2 Formation resistivity measurements using multiple controlled modes
10/04/2012WO2012134656A1 Lag calculation with caving correction in open hole
10/04/2012WO2012134497A1 Method for dynamically assessing petroleum reservoir competency and increasing production and recovery through asymmetric analysis of performance metrics
10/04/2012WO2012131601A1 Wireless network discovery and path optimization algorithm and system
10/04/2012WO2012130940A1 Service panel
10/04/2012WO2012130936A1 Downhole pressure compensating device
10/04/2012WO2012103062A3 Method and apparatus for transmitting a dataset from a tool to a receiver
10/04/2012WO2012097280A3 Rotational wellbore test valve
10/04/2012WO2012082378A3 Apparatus and method for controlling fluid flow from a formation
10/04/2012WO2012078510A3 Methods for improved active ranging and target well magnetization
10/04/2012WO2012075365A3 Mining systems and methods
10/04/2012WO2012068057A3 Neutron wellbore imaging tool
10/04/2012US20120253677 Lag Calculation with Caving Correction in Open Hole
10/04/2012US20120250461 Transmitter and receiver synchronization for wireless telemetry systems
10/04/2012US20120249338 Wireless network discovery and path optimization algorithm and system
10/04/2012US20120247833 Downhole drilling utilizing measurements from multiple sensors
10/04/2012US20120247832 System, method and apparatus for protecting downhole components from shock and vibration
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