High frequency inspection of downhole environment
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United States of America Patent
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May 30, 2017
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May 5, 2016
app pub date -
Nov 5, 2014
filing date -
Nov 5, 2014
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Abstract
Among other things, there are disclosed embodiments of a well-logging tool that inspects features of the down-hole environment using ultrasonic signals with a frequency in the range of 3-5 MHz. The ultrasonic signals are encoded, and their time-of-flight and amplitude provide information on features of interior surface of the casing on the order of 1 mm, and on the quality of the cement bond behind the casing.
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