Method and apparatus for providing accurate wireline depth...

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

G - Physics

01

B

33/183

G01B 3/12 (2006.01) G01B 5/04 (2006.01)

Patent

CA 1255493

A B S T R A C T 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.

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