Carrier system for positioning sensors adjacent a wire rope

Details Carrier system for positioning sensors adjacent a wire rope Carrier system for positioning sensors adjacent a wire rope

1980-07-11

1982-01-26

Swisher, S. Clement

Measuring and testing

Borehole or drilling

Downhole test

324206, E21B 4704

Patent

active

043122230

ABSTRACT:
In an apparatus for measuring depth of equipment in a well, a carrier system is provided on a well rig for positioning sensors adjacent a spiral wound wire rope which moves the equipment upwardly or downwardly. The carrier system employs a housing having rollers that engage the wire rope at two spaced locations. The sensors are located in the housing between the rollers, and they are maintained substantially equidistant from the wire rope by the action of the rollers so that they respond to movement of the spiral windings of the wire rope. A suspension system has arms that support the housing with reference to the rig, and the effective length of the arms is adjusted to compensate for errors in measurement that would be caused by lateral movement of the wire rope along a drum that actuates the wire rope.

REFERENCES:
patent: 2466251 (1949-04-01), Martin
patent: 3643504 (1972-02-01), Rundell

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