Method to determine self-calibrated circumferential cased bond i

Details Method to determine self-calibrated circumferential cased bond i Method to determine self-calibrated circumferential cased bond i

1997-12-17

2000-03-28

Tsay, Frank

Wells

Processes

With indicating, testing, measuring or locating

1662542, 1662531, 367 35, E21B 4712, G01V 140

Patent

active

060418613

ABSTRACT:
A method and device are disclosed for determining the impedance of the cement bond between a borehole casing and its wellbore. The invention uses a predicted resonance response as a baseline for determining from the observed resonance response the approximate impedance of the cement. Corrections are made to account for various defects in the casing by normalizing the received resonance response.

REFERENCES:
patent: 4131875 (1978-12-01), Ingram
patent: 4218766 (1980-08-01), Parrack et al.
patent: 4685092 (1987-08-01), Dumont
patent: 4703427 (1987-10-01), Catala et al.
patent: 4928269 (1990-05-01), Kimball et al.
patent: 5089989 (1992-02-01), Schmidt
patent: 5216638 (1993-06-01), Wright

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