Methods for determining the stuck point of a conduit in a boreho

Details Methods for determining the stuck point of a conduit in a boreho Methods for determining the stuck point of a conduit in a boreho

1977-09-19

1978-08-08

Novosad, Stephen J.

Wells

Processes

With indicating, testing, measuring or locating

166 65R, 166299, 166301, 73151, E21B 2304, E21B 4700

Patent

active

041050703

ABSTRACT:
In the representative manner of practicing the new and improved method disclosed herein, a so-called "stuck-point indicator" or "freepoint-indicator" tool including a unique deformation-responsive sensor tandemly arranged between unique upper and lower tool anchors is positioned in a string of well pipe believed to be stuck in a well bore. The tool is then moved to a selected depth location in the pipe string and, in keeping with the principles of the present invention, operated so that the upper anchor is engaged with the pipe string wall before the lower anchor is engaged. Thereafter, upon application of forces to the upper end of the pipe string, independent measurements are produced by the sensor which are respectively representative of tensional forces and torsional forces acting on that portion of the pipe string between the upper and lower anchors.

REFERENCES:
patent: RE26458 (1968-09-01), Moore
patent: 2629445 (1953-02-01), Dill
patent: 3006186 (1961-10-01), Berry
patent: 3227214 (1966-01-01), Whann
patent: 3367179 (1968-02-01), Moore
patent: 3491830 (1970-01-01), Sweetman
patent: 3555896 (1971-01-01), Roberts
patent: 3670566 (1972-06-01), Basham et al.
patent: 3686943 (1972-08-01), Smith

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