Downhole hydraulic rotary seismic source

Details Downhole hydraulic rotary seismic source Downhole hydraulic rotary seismic source

1992-09-29

1994-02-08

Lobo, Ian J.

Acoustics

Geophysical or subsurface exploration

Well logging

367912, G01V 140

Patent

active

052850234

ABSTRACT:
The present invention relates to an improved downhole seismic source for the simultaneous generation of elliptically polarized shear wave seismic energy and compression wave seismic energy coupled into a borehole. The source of the present invention is capable of receiving several kilowatts of energy downhole to depths of several thousand feet. An orbital vibrator, energized by a hydraulic power means is disposed within a housing. The orbital vibrator imparts an orbital motion which generates seismic wave energy in the borehole. A cable supports the hydraulic power means and the orbital vibrator at selected positions along the borehole for coupling of the seismic wave energy into the borehole.

REFERENCES:
patent: 4709362 (1987-11-01), Cole
patent: 4874081 (1989-10-01), Cole
patent: 5159160 (1992-10-01), Brett

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