Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type
Patent
1986-08-21
1988-04-05
Cangialosi, Salvatore
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Land-reflection type
367 28, 367 43, G01V 140
Patent
active
047363487
ABSTRACT:
A borehole televiewer logging tool employs a transducer assembly having a transmitter of acoustic energy pulses and a receiver of acoustic energy pulses representing reflections of the transmitted acoustic energy pulses from the walls of a borehole traversing a subsurface formation. The transducer assembly is rotated within the borehole and also advanced along the borehole. The received reflection signals are corrected for amplitude modulation resulting from oblique angles of incidence of the transmitted acoustic energy pulses when the logging tool is off-center of the borehole, is in an eliptical borehole, or is tilted from the vertical axis of the borehole. The corrected reflection signals modulate an image display so that the full 360.degree. of the borehole wall can be delineated.
REFERENCES:
patent: 3369626 (1968-02-01), Zemanek, Jr.
patent: 3676842 (1972-07-01), Lee
patent: 3718204 (1973-02-01), Groenendyke
patent: 3728672 (1973-04-01), Dennis et al.
patent: 3872246 (1975-03-01), Schneider
Cangialosi Salvatore
Gilman Michael G.
Hager Jr. George W.
Lobo Ian J.
McKillop Alexander J.
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