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Class Information
Number: 367/86
Name: Communications, electrical: acoustic wave systems and devices > Borehole testing
Description: Subject matter wherein information or intelligence pertaining to the walls of a passageway through the earth is obtained from a device which travels through the passageway and emits acoustic waves into the medium contained within the passageway (e.g., air, water) which are reflected from the walls back to the device and detected.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8654832 Apparatus and method for coding and modulation Feb. 18, 2014
8619501 Ultrasonic measurements performed on rock cores Dec. 31, 2013
8614578 Attenuation of electromagnetic signals passing through conductive material Dec. 24, 2013
8277278 Acoustic imaging while cutting Oct. 2, 2012
8194497 Reduction of tool eccentricity effects on acoustic measurements Jun. 5, 2012
8117014 Methods to estimate subsurface deviatoric stress characteristics from borehole sonic log anisotropy directions and image log failure directions Feb. 14, 2012
8116532 Extraction of processed borehole image elements to create a combined image Feb. 14, 2012
7954595 Lightweight inflatable borehole receiver unit for seismic testing Jun. 7, 2011
7813219 Electro-magnetic acoustic measurements combined with acoustic wave analysis Oct. 12, 2010
7814036 Processing well logging data with neural network Oct. 12, 2010
7792766 Design of reconnaissance surveys using controlled source electromagnetic fields via probabilistic neural network Sep. 7, 2010
7603238 Analysis of time-series data using singularities Oct. 13, 2009
7580797 Subsurface layer and reservoir parameter measurements Aug. 25, 2009
7561997 Simulation system including a simulator and a case manager adapted for organizing data files for the simulator in a non-conventional tree like structure Jul. 14, 2009
7463551 Method of generating directional low frequency acoustic signals and reflected signal detection enhancements for seismic while drilling applications Dec. 9, 2008
7116182 Method and system for downhole clock having compensation Oct. 3, 2006
7062072 Methods of producing images of underground formations surrounding a borehole Jun. 13, 2006
7046165 Method for collecting geological data ahead of a drill bit May. 16, 2006
7042802 Determination of stress characteristics of earth formations May. 9, 2006
6976392 Atomic clock for downhole applications Dec. 20, 2005
6973993 Methods and apparatus of suppressing tube waves within a bore hole and seismic surveying systems incorporating same Dec. 13, 2005
6965849 Method of designing geophysical surveys Nov. 15, 2005
6951262 Method and apparatus for suppressing waves in a borehole Oct. 4, 2005
6915875 Acoustic isolator for downhole applications Jul. 12, 2005
6837332 Method and apparatus for cancellation of unwanted signals in MWD acoustic tools Jan. 4, 2005
6837105 Atomic clock for downhole applications Jan. 4, 2005
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
6739692 Ink jet recording apparatus May. 25, 2004
6739423 Acoustic logging tool May. 25, 2004
6697710 Gas pipe explorer robot Feb. 24, 2004
6614718 Device and method for seismic drill hole measuring Sep. 2, 2003
6456566 Use of minor borehole obstructions as seismic sources Sep. 24, 2002
6351991 Determining stress parameters of formations from multi-mode velocity data Mar. 5, 2002
6002639 Sensor configuration for nulling reverberations to image behind reflective layers Dec. 14, 1999
5996726 System and method for determining the distribution and orientation of natural fractures Dec. 7, 1999
5995447 System and method for processing acoustic signals to image behind reflective layers Nov. 30, 1999
5963508 System and method for determining earth fracture propagation Oct. 5, 1999
5841734 Rotating acoustic transducer head for cement bond evaluation tool Nov. 24, 1998
5834710 Acoustic pulse gun assembly Nov. 10, 1998
5619475 Method of predicting mechanical failure in formation utilizing stress derivatives which measure formation nonlinearity Apr. 8, 1997
5594176 Scan assembly and method for transferring power and data across a rotary interface Jan. 14, 1997
5555220 Slickline conveyed wellbore seismic receiver Sep. 10, 1996
5544127 Borehole apparatus and methods for measuring formation velocities as a function of azimuth, and interpretation thereof Aug. 6, 1996
5502686 Method and apparatus for imaging a borehole sidewall Mar. 26, 1996
RE34975 Ultrasonic measurement apparatus Jun. 20, 1995
5413174 Signal transmission through deflected well tubing May. 9, 1995
5377160 Transmitter and receiver to radially scan the cementing conditions in cased wells Dec. 27, 1994
5354956 Ultrasonic measurement apparatus Oct. 11, 1994
5318129 Method and device for setting up sondes against the wall of a cased well Jun. 7, 1994

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