Method and apparatus for providing accurate wireline depth measu

Details Method and apparatus for providing accurate wireline depth measu Method and apparatus for providing accurate wireline depth measu

1985-06-11

1986-03-25

Little, Willis

Geometrical instruments

Area integrators

Electrical

33141R, G01B 504

Patent

active

045774102

ABSTRACT:
For use with a wireline supporting a tool in a well borehole, length measuring apparatus is disclosed. In the preferred form, the length measuring apparatus comprises a housing around the wireline locus, rollers clamping the wireline, and helix following wheels. The wheels track the helix of the wireline around the wireline, rotating on a bearing assembly, and driving a chain. The chain drives an encoder to record length of the wireline in the well borehole.

REFERENCES:
patent: 2876549 (1959-03-01), Adamson et al.
patent: 4205447 (1980-06-01), Smith
patent: 4338565 (1982-07-01), Hall
patent: 4481714 (1984-11-01), Nelson

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