Method of creating a wellbore in an underground formation

Wells – Processes – Assembling well part

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166384, E21B 1700

Patent

active

053480953

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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patent: 3693717 (1972-09-01), Wuenschel
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patent: 4977958 (1990-12-01), Miller

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