Downhole orbital seismic source

Details Downhole orbital seismic source Downhole orbital seismic source

1988-01-19

1989-10-17

Steinberger, Brian S.

Acoustics

Geophysical or subsurface exploration

Well logging

367912, G01V 140

Patent

active

048740616

ABSTRACT:
Apparatus for simultaneously generating elliptically polarized seismic shear waves and compression waves downhole for coupling energy through the fluid into the borehole wall. The apparatus includes an elongate frame for support in the borehole and the frame includes a drive means energizable to impart an orbital motion to at least a portion of the frame thereby to generate an orbital shear wave.

REFERENCES:
patent: 3309877 (1967-03-01), Degan
patent: 3360056 (1967-12-01), Bodine, Jr.
patent: 3578081 (1971-05-01), Bodine
patent: 3718205 (1973-02-01), Fair et al.
patent: 4310066 (1982-01-01), Won
patent: 4709362 (1987-11-01), Cole

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