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Class Information
Number: 367/34
Name: Communications, electrical: acoustic wave systems and devices > Seismic prospecting > Well logging > Received signal cycle discrimination
Description: Subject matter wherein particular cycles of the received signals are analyzed or processed to provide particular information or improved signal-to-noise response.

Patents under this class:

Patent Number Title Of Patent Date Issued
8625390 Acoustic waveform stacking using azimuthal and/or standoff binning Jan. 7, 2014
8547789 Method for gas zone detection using sonic wave attributes Oct. 1, 2013
8542553 Downhole sonic logging tool including irregularly spaced receivers Sep. 24, 2013
8270248 Method for initializing receiver channels in a cement bond logging tool Sep. 18, 2012
7675813 Methods and systems for detecting arrivals of interest Mar. 9, 2010
7423930 Methods and systems for detecting arrivals of interest Sep. 9, 2008
6920083 Method intended for detection and automatic classification, according to various selection criteria, of seismic events in an underground formation Jul. 19, 2005
6837332 Method and apparatus for cancellation of unwanted signals in MWD acoustic tools Jan. 4, 2005
6643220 Vapor handling in printing Nov. 4, 2003
6630890 Methods, systems and tools for borehole logging Oct. 7, 2003
6618322 Method and apparatus for measuring acoustic mud velocity and acoustic caliper Sep. 9, 2003
5780784 Cancellation of tool mode signal from combined signal Jul. 14, 1998
5724308 Programmable acoustic borehole logging Mar. 3, 1998
5654938 Method for identifying alteration of earth formations using dipole acoustic logging Aug. 5, 1997
5541890 Method for predictive signal processing for wireline acoustic array logging tools Jul. 30, 1996
5502686 Method and apparatus for imaging a borehole sidewall Mar. 26, 1996
RE34975 Ultrasonic measurement apparatus Jun. 20, 1995
5289433 Acoustic multi-mode wide-band logging device Feb. 22, 1994
5278805 Sonic well logging methods and apparatus utilizing dispersive wave processing Jan. 11, 1994
5226017 Method and apparatus for acquiring borehole seismic data in two opposite directions Jul. 6, 1993
5159577 Technique for reducing whirling of a drill string Oct. 27, 1992
5159578 Apparatus for rotating a transducer assembly of a borehole logging tool in a deviated borehole Oct. 27, 1992
5130950 Ultrasonic measurement apparatus Jul. 14, 1992
5124952 Formation fracture detection using instantaneous characteristics of sonic waveforms Jun. 23, 1992
5058077 Compensation technique for eccentered MWD sensors Oct. 15, 1991
5010527 Method for determining the depth of a hydraulic fracture zone in the earth Apr. 23, 1991
4985873 Method and apparatus for determining compressional first arrival times from waveform threshold crossings provided by apparatus disposed in a sonic well tool Jan. 15, 1991
4951266 Method of filtering sonic well logging data Aug. 21, 1990
4901289 System for acquiring and recording signals delivered by a set of sensors disposed in well probes Feb. 13, 1990
4875197 Method and apparatus for determining propagation velocities of elastic waves in a borehole Oct. 17, 1989
4817059 Borehole logging methods for detection and imaging of formation structural features Mar. 28, 1989
4703427 Method for evaluating the quality of cement surrounding the casing of a borehole Oct. 27, 1987
4531204 Computerized truck instrumentation system Jul. 23, 1985
4527260 Method for seismic exploration by vertical seismic profiling and installation for its implementation Jul. 2, 1985
4524432 Measurement of porosity and formation factor using slow compressional waves Jun. 18, 1985
4428072 Seismic well log display method and apparatus Jan. 24, 1984
4397004 Method for seismic exploration by vertical seismic profiling and installation for its implementation Aug. 2, 1983
4367541 Apparatus and method for determining velocity of acoustic waves in earth formations Jan. 4, 1983
4320470 Method and apparatus for acoustic well logging Mar. 16, 1982
4223398 Method for acoustic signal detection Sep. 16, 1980
4210967 Method and apparatus for determining acoustic wave parameters in well logging Jul. 1, 1980
4042907 Apparatus for preventing cycle skipping in processing acoustic well-logging signals Aug. 16, 1977

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