METHOD AND DEVICE FOR CASING A BORED WELL PORTION
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United States of America Patent
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Issued Date -
Mar 10, 2011
app pub date -
Feb 10, 2009
filing date -
Feb 20, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention comprises using a tube having a ductile and radially expansible upper portion, provided at the base thereof with a seal that is also radially expansible under the action of the weight of the tube, the latter being thus sized so that when its base abuts the bottom of the well, the upper portion is located above a fractured area to be isolated, the procedure comprising the following steps: the tube is inserted into the well so that the base thereof bears against the bottom, triggering the radial expansion of the seal; using an expansion tool, the upper portion of the tube is radially expanded beyond its yield strength in order to apply the same tightly against the wall of the well above the fractured area. The invention can be used in the petroleum industry.
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