Concentric pipes expanded at the pipe ends and method of forming
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United States of America Patent
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-
Oct 21, 2008
Grant Date -
Oct 16, 2003
app pub date -
Apr 23, 2003
filing date -
Mar 11, 1999
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method of forming a wellhead including: drilling a wellbore; positioning an outer casing at least partially within an upper portion of the wellbore; positioning a first tubular member within the outer casing; expanding at least a portion of the first tubular member into contact with an interior surface of the outer casing; positioning a second tubular member within the outer casing and the first tubular member; and expanding at least a portion of the second tubular member into contact with an interior portion of the outer casing; wherein, after expanding the portions of the first and second tubular members into contact with the interior portion of the outer casing, at least a portion of the second tubular member is positioned within the first tubular member; and wherein, after expanding the portions of the first and second tubular members into contact with the interior portion of the outer casing, the first tubular member and the second tubular member define a passage there between.
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