Communications: electrical – Selective – Having electron beam device
Patent
1976-09-07
1978-08-08
Wilbur, Maynard R.
Communications: electrical
Selective
Having electron beam device
340 155TN, 340 155SW, G01V 122, G01V 128
Patent
active
041059930
ABSTRACT:
The present invention relates to a method of determining the "P" and "S" wave propagation velocities and the Young's modulus and Poisson's ratio in geological formations. An acoustic transmitter is placed in a borehole, and receivers in another borehole at predetermined heights. The differences in the propagation times of "P" waves and the exact distance between receivers and transmitter enable the velocities of the "P" and "S" waves to be obtained with sufficient accuracy to calculate the constants. The invention is useful in civil engineering.
REFERENCES:
patent: RE18565 (1932-08-01), Rosaire
patent: 2062151 (1936-11-01), Weatherby
patent: 2276335 (1942-03-01), Peterson
patent: 3208549 (1965-09-01), Alexander et al.
patent: 3876016 (1975-04-01), Stinson
patent: 3962674 (1976-06-01), Howell
patent: 3979724 (1976-09-01), Silverman et al.
patent: 3993974 (1976-11-01), Silverman et al.
patent: 4003017 (1977-01-01), Bailey
Geophysical Prospecting, vol. 23, No. 1, Mar. 1975, pp. 53-55, D. M. McCann et al., "Inter-Borehole Acoustic Measurements and Their Use in Engineering Geology".
Apert Dominique
Etchecopar Arnaud
Grassy Robert
Goodwin Lawrence
Services et Instruments de Geophysique
Wilbur Maynard R.
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