Collar locating apparatus

Details Collar locating apparatus Collar locating apparatus

1976-01-15

1977-08-30

Phillips, Charles E.

Geometrical instruments

Area integrators

Electrical

166 64, E21B 4704, G01B 518

Patent

active

040444708

ABSTRACT:
A collar locating apparatus is disclosed. It is a wire line tool adapted to be run in a tubing string to count the number of collars and thereby determine depth. It incorporates an elongate body. It has a pair of caliper arms which are spring loaded to flare outwardly. The device is run to the bottom of the tubing string and is jar operated to sever a shear pin whereupon the caliper arms are released to deflect outwardly. The extent of deflection of the arms is determined by an adjustable nut below the arms which slides downwardly on the body and releases the arms for controlled outward deflection. The arms are pivoted and clamped at a common collar above the arms to enable them to pivot.

REFERENCES:
patent: 1893600 (1933-01-01), Shull
patent: 2766533 (1956-10-01), Brandon
patent: 2854758 (1958-10-01), Owen
patent: 2960165 (1960-11-01), Schrann
patent: 3474539 (1969-10-01), Moore
patent: 3902361 (1975-09-01), Watson

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