Method for correcting slippage during wireline depth measurement

Details Method for correcting slippage during wireline depth measurement Method for correcting slippage during wireline depth measurement

1989-04-27

1990-05-15

Cuchlinski, Jr., William A.

Geometrical instruments

Distance measuring

Sounding type

33735, 33773, G01B 312

Patent

active

049245961

ABSTRACT:
A method for measuring wireline depths in a borehole using paired encoder wheels frictionally engaging the wireline is disclosed. The method allows for the correction of the measurement from a slipping encoder wheel without corrupting the measurement from the non-slipping encoder wheel.
The method comprises incrementing corresponding depth counters whenever a pulse is produced by one of the encoder wheels. The depth counts are compared and if a significant difference exists, the value of the counter corresponding to the slipping encoder wheel is set equal to the value or the other wheel.

REFERENCES:
patent: 4052599 (1977-10-01), Whiteley et al.
patent: 4117600 (1978-10-01), Guignard et al.
patent: 4179817 (1979-12-01), Lavigne et al.
patent: 4447955 (1984-05-01), Stutz et al.
patent: 4718168 (1988-01-01), Kerr

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