Ultrasonic surface texture measurement apparatus and method

Details Ultrasonic surface texture measurement apparatus and method Ultrasonic surface texture measurement apparatus and method

1985-12-27

1987-03-03

Levy, Stewart J.

Measuring and testing

Borehole or drilling

Downhole test

181105, E21B 4900, G01V 140

Patent

active

046465650

ABSTRACT:
An ultrasonic borehole televiewer is modified to provide a vertical array of receiving transducers arranged above and below a conventional transmit/receive transducer. The variation in amplitude of reflected energy detected across this array for each firing of the televiewer is a measure of the extent to which scattered energy is present in addition to specular reflections. This in turn is an index of the relative smoothness or roughness of the borehole surface on a scale comparable to or smaller than the wavelength of the incident energy.

REFERENCES:
patent: 3021706 (1962-02-01), Cook et al.
Short, "Borehole TV Camera Gives Geologists Inside Story", Nov. 1962.
Pasternack, "Transactions of the SPWLA Twenty-Fourth Annual Logging Symposium", Jun. 1983, vol. 1, pp. 1 to 12.

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