Wellhead
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United States of America Patent
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Dec 12, 2006
Issued Date -
N/A
app pub date -
Aug 13, 2004
filing date -
Dec 7, 1998
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A wellhead is formed by extruding a plurality of tubular liners off of a mandrel into contact with an outer casing. The first tubular liner and mandrel are positioned within the wellbore with the tubular liner in an overlapping relationship with the outer casing. At least a portion of the tubular liner is extruded off of the mandrel into contact with the interior surface of the outer casing. The first tubular liner is extruded off of the mandrel by pressurizing an interior portion of the first tubular liner. Subsequent tubular liners are positioned in concentric overlapping relation and similarly extruded off of a mandrel into at least partial contact with the interior surface of the outer casing.
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