Method for determining the shape of an underground cavity and th

Details Method for determining the shape of an underground cavity and th Method for determining the shape of an underground cavity and th

1973-06-21

1976-06-08

Farley, Richard A.

Acoustics

Geophysical or subsurface exploration

Well logging

181104, 181105, 340 155TN, G01V 140

Patent

active

039616835

ABSTRACT:
Method for determining the shape of an underground cavity and the location of the interface between two media contained therein by making use of a sonic sonde comprising performing, for each position of the sonde, a series of measurements of the time interval between the transmission of an ultrasonic wave from the sonde and the reception of the corresponding echo after reflection on the wall of the cavity, the selection from said measurements of one of those indicating substantially identical time intervals so as to eliminate the false echos and the determination of the average value of the propagation time of said selected echo for each different location of the sonde and for each direction of the transmitted waves.

REFERENCES:
patent: 2595241 (1952-05-01), Goble
patent: 3406779 (1968-10-01), Zemanek, Jr. et al.
patent: 3425507 (1969-02-01), Caldwell
patent: 3437834 (1969-04-01), Schwartz
patent: 3467875 (1969-09-01), Engle
patent: 3614891 (1971-10-01), Nolte
patent: 3629832 (1971-12-01), Vogel
patent: 3687218 (1972-09-01), Ritter

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