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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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