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Class Information
Number: 181/105
Name: Acoustics > Geophysical or subsurface exploration > Well logging > Bore hole or casing condition
Description: Subject matter for investigating physical conditions of well bores and casings, such as obstructions, bore surfaces, etc.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8576661 Device and method for imaging of non-linear and linear properties of formations surrounding a borehole Nov. 5, 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
8387743 Systems and methods for acoustically measuring bulk density Mar. 5, 2013
RE43960 System for measuring stress in downhole tubulars Feb. 5, 2013
8279708 Measurement method for a granular compaction pile using crosshole seismic testing Oct. 2, 2012
8002031 Independent measuring and processing probe for preliminary studies on a well Aug. 23, 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
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
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
7652950 Radial profiling of formation mobility using horizontal and vertical shear slowness profiles Jan. 26, 2010
7639563 Method for sonic indication of voids in casing cement Dec. 29, 2009
7529150 Borehole apparatus and methods for simultaneous multimode excitation and reception to determine elastic wave velocities, elastic modulii, degree of anisotropy and elastic symmetry configuratio May. 5, 2009
7525872 Method and apparatus for cement bond evaluation using transversely polarized shear waves Apr. 28, 2009
7522471 Multimode acoustic imaging in cased wells Apr. 21, 2009
7500539 Method and apparatus of using crossed magnetic fields for measuring conductivity, permeability and porosity Mar. 10, 2009
7495995 Method and apparatus for investigating a borehole with a caliper Feb. 24, 2009
7492664 Method for processing acoustic reflections in array data to image near-borehole geological structure Feb. 17, 2009
7460435 Acoustic transducers for tubulars Dec. 2, 2008
7457194 Discriminating natural fracture- and stress-induced sonic anisotropy using a combination of image and sonic logs Nov. 25, 2008
7414918 Method for normalizing signals in a cement bond logging tool Aug. 19, 2008
7219762 Method and apparatus for acoustic detection of a fluid leak behind a casing of a borehole May. 22, 2007
7178627 Methods for use in detecting seismic waves in a borehole Feb. 20, 2007
7149146 Determination of the impedance of a material behind a casing combining two sets of ultrasonic measurements Dec. 12, 2006
7048089 Methods and apparatus for use in detecting seismic waves in a borehole May. 23, 2006
7046165 Method for collecting geological data ahead of a drill bit May. 16, 2006
7012852 Method, apparatus and system for detecting seismic waves in a borehole Mar. 14, 2006
6985086 Method and apparatus for LWD shear velocity measurement Jan. 10, 2006
6973993 Methods and apparatus of suppressing tube waves within a bore hole and seismic surveying systems incorporating same Dec. 13, 2005
6951262 Method and apparatus for suppressing waves in a borehole Oct. 4, 2005
6909666 Method and apparatus for generating acoustic signals for LWD shear velocity measurement Jun. 21, 2005
6891777 Subsurface borehole evaluation and downhole tool position determination methods May. 10, 2005
6850168 Method and apparatus for LWD shear velocity measurement Feb. 1, 2005
6850462 Memory cement bond logging apparatus and method Feb. 1, 2005
6837332 Method and apparatus for cancellation of unwanted signals in MWD acoustic tools Jan. 4, 2005
6834743 Wideband isolator for acoustic tools Dec. 28, 2004
6814179 Seismic sensing apparatus and method with high-g shock isolation Nov. 9, 2004
6782970 Acoustic source using a shaftless electrical hammer Aug. 31, 2004
6776255 Methods and apparatus of suppressing tube waves within a bore hole and seismic surveying systems incorporating same Aug. 17, 2004
6739423 Acoustic logging tool May. 25, 2004
6702010 Apparatus and method for actuating arms Mar. 9, 2004
6631783 Mapping reservoir characteristics using earth's nonlinearity as a seismic attribute Oct. 14, 2003
6619423 Measuring device for measuring the elastic properties of a surface structure Sep. 16, 2003

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