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Class Information
Number: 367/35
Name: Communications, electrical: acoustic wave systems and devices > Seismic prospecting > Well logging > Borehole or casing condition
Description: Subject matter wherein the information or intelligence pertains to the passageway itself or to the lining of the passageway.










Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8681582 Method for sonic indication of formation porosity and lithology Mar. 25, 2014
8681583 Method for calculating spatial and temporal distribution of the Gutenberg-Richter parameter for induced subsurface seismic events and its application to evaluation of subsurface formations Mar. 25, 2014
8638639 Method of using dipole compressional data to determine properties of a subterranean structure Jan. 28, 2014
8634272 Televiewer image wood-grain reduction techniques Jan. 21, 2014
8625390 Acoustic waveform stacking using azimuthal and/or standoff binning Jan. 7, 2014
8611183 Measuring standoff and borehole geometry Dec. 17, 2013
8576660 Ultrasonic imaging in wells or tubulars Nov. 5, 2013
8576661 Device and method for imaging of non-linear and linear properties of formations surrounding a borehole Nov. 5, 2013
8553493 Method for permeable zone detection Oct. 8, 2013
8553494 System for measuring stress in downhole tubulars Oct. 8, 2013
8553495 Device and method for imaging of non-linear and linear properties of formations surrounding a borehole Oct. 8, 2013
8462584 Sonic borehole caliper and related methods Jun. 11, 2013
8441889 Self-stabilizing dynamic diaphragm for broad bandwidth acoustic energy source May. 14, 2013
8408355 Enclosures for containing transducers and electronics on a downhole tool Apr. 2, 2013
8411529 Walkaway VSP calibrated sonic logs Apr. 2, 2013
RE43960 System for measuring stress in downhole tubulars Feb. 5, 2013
8369667 Downhole cable Feb. 5, 2013
8362782 Resonance method for measuring water-oil ratio, conductivity, porosity, permeability and electrokinetic constant in porous formations Jan. 29, 2013
8289808 System and method to estimate compressional to shear velocity (VP/VS) ratio in a region remote from a borehole Oct. 16, 2012
8256565 Enclosures for containing transducers and electronics on a downhole tool Sep. 4, 2012
8194497 Reduction of tool eccentricity effects on acoustic measurements Jun. 5, 2012
8135541 Wellbore tracking Mar. 13, 2012
8130591 Downhole measurements of mud acoustic velocity Mar. 6, 2012
8077545 Method for detecting gas influx in wellbores and its application to identifying gas bearing formations Dec. 13, 2011
7986588 Method for selective bandlimited data acquisition in subsurface formations Jul. 26, 2011
7940192 Channel equalization for mud-pulse telemetry May. 10, 2011
7924652 Method for determining seismic anisotropy Apr. 12, 2011
7913806 Enclosures for containing transducers and electronics on a downhole tool Mar. 29, 2011
7911876 Method for initializing receiver channels in a cement bond logging tool Mar. 22, 2011
7911877 Active noise cancellation through the use of magnetic coupling Mar. 22, 2011
7885142 Method and apparatus for logging foam cement in cased boreholes Feb. 8, 2011
7813220 Method and apparatus for long term seismic monitoring Oct. 12, 2010
7773454 Method and apparatus for cement evaluation using multiple acoustic wave types Aug. 10, 2010
7764572 Methods and systems for acoustic waveform processing Jul. 27, 2010
7755972 Borehole apparatus and methods for simultaneous multimode excitation and reception to determine elastic wave velocities, elastic modulii, degree of anisotropy and elastic symmetry configuratio Jul. 13, 2010
7755973 Ultrasonic logging methods and apparatus for automatically calibrating measures of acoustic impedance of cement and other materials behind casing Jul. 13, 2010
7710823 Resistivity measurement through metal casing using magnetic field and magnetoacoustic phenomena May. 4, 2010
7697375 Combined electro-magnetic acoustic transducer Apr. 13, 2010
7681450 Casing resonant radial flexural modes in cement bond evaluation Mar. 23, 2010
7675814 Method and apparatus for generating acoustic signals with a single mode of propagation Mar. 9, 2010
7668043 Methods and systems for sonic log processing Feb. 23, 2010
7663969 Use of Lamb waves in cement bond logging Feb. 16, 2010
7660197 System for measuring stress in downhole tubulars Feb. 9, 2010
7656747 Ultrasonic imaging in wells or tubulars Feb. 2, 2010
7657403 Method for reducing digital data in an EMAT pig Feb. 2, 2010
7652950 Radial profiling of formation mobility using horizontal and vertical shear slowness profiles Jan. 26, 2010
7649804 In-situ determination of yield stress state of earth formations Jan. 19, 2010
7646674 Borehole apparatus and methods for simultaneous multimode excitation and reception to determine elastic wave velocities, elastic modulii, degree of anisotropy and elastic symmetry configuratio Jan. 12, 2010
7639562 Active noise cancellation through the use of magnetic coupling Dec. 29, 2009
7639563 Method for sonic indication of voids in casing cement Dec. 29, 2009

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