Method of creating a wellbore in an underground formation
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United States of America Patent
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Sep 20, 1994
Grant Date -
N/A
app pub date -
Jun 7, 1993
filing date -
Jun 9, 1992
priority date (Note) -
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Abstract
A method of creating a wellbore in an underground formation is provided. A borehole is drilled in the underground formation, whereafter a casing of a ductile material is lowered into the borehole. The casing is selected to have a smaller elastic radial deformation than the surrounding formation when the casing is radially expanded against the borehole wall by application of a radial force to the casing. Said radial force is applied to the casing so as to radially expand the casing against the borehole wall thereby inducing a plastic radial deformation of the casing and an elastic radial deformation of the surrounding underground formation, whereafter the radial force is removed from the casing.
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