Method and apparatus for improving wireline depth measurements

Details Method and apparatus for improving wireline depth measurements Method and apparatus for improving wireline depth measurements

2006-11-28

2006-11-28

Barlow, John (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Earth science

C175S045000

Reexamination Certificate

active

07142985

ABSTRACT:
Wireline depths are estimated using cable depth measurements and accelerometer depth measurements made over a time interval encompassing the time for which the wireline depth is being estimated. A least squares smoothing filter or a weighted least squares smoothing filter may be used. Problems caused by washouts in the borehole are also addressed.

REFERENCES:
patent: 3490149 (1970-01-01), Bowers
patent: 4545142 (1985-10-01), Whisnant
patent: 4545242 (1985-10-01), Chan
patent: 5019978 (1991-05-01), Howard et al.
patent: 5541587 (1996-07-01), Priest
patent: 5678643 (1997-10-01), Robbins et al.

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