Method for correcting slippage during wireline depth measurements
US4924596A · kind A · utility
7Cited by
5References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 27, 1989 |
| Grant date | May 15, 1990 |
| Priority date | — |
| Expiry date | Apr 27, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B21/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.