Continuous shear wave logging apparatus

Acoustics – Geophysical or subsurface exploration – Well logging

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367 31, 367 75, 181401, G01V 116, G01V 140, G01V 1053

Patent

active

045496307

ABSTRACT:
Apparatus for continuous shear wave logging of a borehole consisting of a sonde instrument having retractable, expandable coupling arms for rigidly engaging the borehole wall to exert repetitive torqueing action while continuously moving uphole. The sonde includes spaced detector coupling arms in continual contact with the borehole wall and polarized for detection of the repetitive propagated shear waves.

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patent: 3475722 (1969-10-01), White
patent: 4310066 (1982-01-01), Won
patent: 4380806 (1983-04-01), Waters et al.
patent: 4394754 (1983-07-01), Waters

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