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Class Information
Number: 367/26
Name: Communications, electrical: acoustic wave systems and devices > Seismic prospecting > Well logging > Threshold set system
Description: Subject matter wherein detected waves are converted to electrical signals having a characteristic (e.g., amplitude, timing) which is compared with a standard to determine the acceptability of the signal by the system.










Patents under this class:

Patent Number Title Of Patent Date Issued
8125848 Acoustic logging-while-drilling tools having a hexapole source configuration and associated logging methods Feb. 28, 2012
7953554 Signal thresholding apparatus, systems, and methods May. 31, 2011
7418348 Signal thresholding apparatus, systems, and methods Aug. 26, 2008
6920083 Method intended for detection and automatic classification, according to various selection criteria, of seismic events in an underground formation Jul. 19, 2005
6678207 Trapped water bottom multiple and peg-leg multiple suppression for ocean bottom seismic data Jan. 13, 2004
6366531 Method and apparatus for acoustic logging Apr. 2, 2002
6272444 Method for characterizing the coherence of an environment characteristic measurements Aug. 7, 2001
6208585 Acoustic LWD tool having receiver calibration capabilities Mar. 27, 2001
6189383 Method and apparatus for acoustic logging of fluid density and wet cement plugs in boreholes Feb. 20, 2001
6188643 Method and apparatus for inspecting well bore casing Feb. 13, 2001
6137621 Acoustic logging system using fiber optics Oct. 24, 2000
5946271 Calibration system for use in time lapse tomography Aug. 31, 1999
5661696 Methods and apparatus for determining error in formation parameter determinations Aug. 26, 1997
5184329 Method and device for optimizing the triggering of an array of marine seismic sources Feb. 2, 1993
5164548 Method and apparatus for ultrasonic scanning of a borehole having improved sensor array and timing circuit Nov. 17, 1992
5058078 Method and apparatus for determining compressional first arrival times from waveform threshold crossing provided by apparatus disposed in a sonic well tool Oct. 15, 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
4870627 Method and apparatus for detecting and evaluating borehole wall fractures Sep. 26, 1989
4845616 Method for extracting acoustic velocities in a well borehole Jul. 4, 1989
4594691 Sonic well logging Jun. 10, 1986
4575830 Indirect shearwave determination Mar. 11, 1986
4562556 Compressional and shear velocity logging method apparatus Dec. 31, 1985
4495606 Method and apparatus for combined cement bond and acoustic well logging Jan. 22, 1985
4446540 Acoustic well logging with energy level detection May. 1, 1984
4402068 Method and apparatus for acoustic well logging Aug. 30, 1983
4349896 Digital acoustic logging method and apparatus Sep. 14, 1982
4223398 Method for acoustic signal detection Sep. 16, 1980
4210965 Acoustic well logging method and apparatus for detecting and measuring an acoustic wave Jul. 1, 1980
4168483 System for detecting substructure microfractures and method therefor Sep. 18, 1979
4066992 Seismic mine monitoring system Jan. 3, 1978
4042907 Apparatus for preventing cycle skipping in processing acoustic well-logging signals Aug. 16, 1977
4040001 Acoustic well logging with threshold adjustment Aug. 2, 1977











 
 
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