Patent ID: 7398832

Claim:
A method of forming a mono diameter wellbore casing within a borehole that traverses a subterranean formation, comprising: positioning a first wellbore casing within the borehole; radially expanding and plastically deforming the first wellbore casing within the borehole; positioning a second wellbore casing within the borehole in overlapping relation to the first wellbore casing; radially expanding and plastically deforrning the second wellbore casing within the borehole so that the second wellbore casing comprises a first configuration in which the inside diameter of the overlapping portion of the second wellbore casing is less than the inside diameter of the portion of the first wellbore casing that does not overlap with the second wellbore casing; radially expanding and plastically deforming the overlapping portions of the first and second wellbore casings; and radially expanding and plastically deforming at least a portion of the second wellbore casing that does not overlap with the first wellbore casing so that the second wellbore casing comprises a second configuration in which the inside diameter of the overlapping portion and the at least a portion of the second wellbore casing is egual to the inside diameter of the portion of the first wellbore casing that does not overlap with the second wellbore casing.