Combination geophone-hydrophone

Details Combination geophone-hydrophone Combination geophone-hydrophone

1977-06-13

1979-01-09

Birmiel, Howard A.

Communications: electrical

Selective

Having indication or alarm

340 17R, 181102, G01V 118, G01V 140

Patent

active

041340973

ABSTRACT:
A method and apparatus for measuring and identifying up- and down-traveling waves wherein both a velocity-sensitive and pressure-sensitive transducer are disposed at a point below the earth's surface, as for example in a borehole that is refilled. The pressure transducer is designed to provide intimate contact with the formation surrounding the borehole, and in addition, is the electrical equivalent of the velocity transducer.

REFERENCES:
patent: 2717369 (1955-09-01), Bardeen et al.
patent: 3290645 (1966-12-01), Pavey, Jr. et al.
patent: 3332057 (1967-07-01), Pavey, Jr.

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