Method and apparatus for determining cement conditions

Details Method and apparatus for determining cement conditions Method and apparatus for determining cement conditions

1988-05-26

1989-01-31

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Well logging

367 27, 181105, G01V 140

Patent

active

048021458

ABSTRACT:
An apparatus and method of use thereof are disclosed herein for determining cement conditions adjacent a casing set within a wellbore. At least one acoustic transmitting and receiving transducer and at least one acoustic receiving transducer are positioned into contact with the interior surface of the casing. At least one pulse of acoustic energy is transmitted into the media surrounding the wellbore from the at least one acoustic transmitting and receiving transducer. Electrical signals are generated in response to acoustic energy received by both transducers from the surrounding media. Representations of the generated electrical signals are recorded as a function of the depth within the wellbore and are indicative of the cement conditions, including the casing-cement bond, the cement-formation bond, cement thickness, and the acoustic velocity associated with the cement.

REFERENCES:
patent: 4495605 (1985-01-01), Desbrandes et al.
patent: 4665511 (1987-05-01), Rodney et al.

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