Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Patent
1990-04-27
1991-03-19
Steinberger, Brian S.
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Well logging
181104, G01V 100
Patent
active
050016768
ABSTRACT:
A logging tool is lowered in a borehole. The tool is positioned so that the transducer is offset from the axis of the borehole. The transducer transmits acoustic energy such that it strikes the borehole wall or casing at an incident angle that directs reflections from the borehole wall away from the transducer and at the same time allows transmission into the surrounding formations or cement in the borehole annulas between the casing and the borehole wall. Reflections of the transmitted acoustic energy from anomalies within the surrounding formations as well as cement in the annulas are received by the transducer.
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Article entitled "Ultrasonic Cement Bond Evaluation", by R. M. Havira, dated Mar. 18, 1982.
Hager Jr. George W.
McKillop Alexander J.
Mobil Oil Corporation
Speciale Charles J.
Steinberger Brian S.
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