CET. A [[cased hole]] cement evaluation log that displays data processed from ultrasonic [[transducer|transducers]] in such a way that [[channel|channels]] in the [[cement]] sheath can be detected. The quality of the cement is given in eight radial segments, and the orientation of a channel can be determined from a recording of the well [[deviation]] and the [[relative bearing]] of the first transducer. An acoustic caliper measurement is provided from eight radii measurements. Compare [[cement bond log]]. CET is a Schlumberger mark.

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