Packing tool apparatus for sealing well bores

Details Packing tool apparatus for sealing well bores Packing tool apparatus for sealing well bores

1983-02-09

1985-05-07

Novosad, Stephen J.

Wells

Packers or plugs

With expanding anchor

166134, 277 26, E21B 3312

Patent

active

045152136

ABSTRACT:
An improved packing tool (P1) for sealing spaces between the wall (10) of a wellbore and means (12) defining an elongate member (e.g. tubing) disposed longitudinally in the well bore including a sealing mechanism supportable peripherally about the elongate member and including at least one element (27) containing a shape memory alloy material which maintains a radially contracted condition at below a predetermined temperature--corresponding to the transition temperature of the shape memory alloy--to enable introduction of the sealing mechanism into the well bore and which responds to the temperature by transforming into a radially expanded condition to make sealing contact with the wall of the well bore, establishing a tight metal to metal seal therethrough.

REFERENCES:
patent: 3285470 (1966-11-01), Frei et al.
patent: 3520361 (1970-07-01), Lewis
patent: 4424865 (1984-01-01), Payton, Jr.

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