System for acoustic caliper measurements
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United States of America Patent
Stats
-
May 12, 1987
Grant Date -
N/A
app pub date -
Mar 30, 1984
filing date -
Mar 30, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to an apparatus and method for calipering a borehole using acoustic measurements within the borehole. These acoustic measurements are useful for measuring the reflectivity of the side walls of a borehole and for calipering a borehole in a wireline or measurement while drilling configuration. The apparatus comprises at least one acoustic transceiver disposed on a calipering tool, together with a second acoustic receiver disposed longitudinally a selected distance from the first receiver. Further, a second acoustic transceiver is disposed on the caliper tool azimuthally from the first transceiver. Measurement of the travel times of acoustic pulses reflected from the borehole walls by the transceivers and receivers of this device, together with other known data, permits an accurate caliper of the borehole to be produced.
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