Depth measurement of slickline

Details Depth measurement of slickline Depth measurement of slickline

E - Fixed Constructions

21

B

E21B 47/04 (2006.01) E21B 47/09 (2006.01) G01B 7/02 (2006.01) G01B 7/26 (2006.01)

Patent

CA 2129391

A depth measuring system for a slickline utilized in a well bore operation where the slickline is in a non-slip relationship with the circumference of a calibrated measuring wheel and the revolutions of the wheel are utilized to provide a first length measurement. A load cell is provided to measure tension in the slickline so that length elongation of the slickline due to tension can be determined. A temperature differential determination is made so that corrections in length can be made for the temperature effects. The temperature differential can be temperature effects on the measuring wheel and/or temperature effects of the slickline in the well bore. The measuring wheel determination of length is algebraically summed with the tension elongation and changes due to temperature to provide a more accurate indication of the depth measurement in the well bore.

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