Packing tool apparatus for sealing well bores
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United States of America Patent
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-
May 7, 1985
Grant Date -
N/A
app pub date -
Feb 9, 1983
filing date -
Feb 9, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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