Methods of using downhole polymer plug
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United States of America Patent
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May 24, 2005
Grant Date -
Oct 7, 2004
app pub date -
Apr 7, 2003
filing date -
Apr 7, 2003
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Disclosed is a method of either plugging or lining a wellbore or casing using a polymer member into which stored energy or shape memory has been introduced. The shape memory is introduced into the member by reducing its diameter, such as by compressing the member using a rolling mill machine or stretching the member axially. Next, the member is lowered into a desired location in the wellbore or casing and subjected to conditions causing at least partial recovery of the anelastic strain. The conditions causing recovery of the anelastic strain can include heat from the reservoir surrounding the wellbore, heat introduced into the wellbore, solvents, and combinations thereof. Recovery of the anelastic strain causes the member to expand in diameter, thus plugging or lining the wellbore or casing at the desired location.
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