Accessing subterranean resources by formation collapse
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United States of America Patent
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-
Apr 8, 2008
Grant Date -
Jun 22, 2006
app pub date -
Dec 21, 2004
filing date -
Dec 21, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A subterranean zone can be accessed from the surface by forming a well bore extending from the surface into the subterranean zone. A tubing string is provided within the well bore, and an underreamer passed over the tubing string to a specified location within the subterranean zone. The underreamer is operated in forming an enlarged cavity in the well bore, and the subterranean zone about the tubing string is collapsed. Pressure within the enlarged cavity my be reduced to facilitate collapse of the subterranean zone about the tubing. The tubing string is provided with apertures, either before being positioned in the well or after, to allow passage of fluids into an interior of the tubing string. The fluids from the subterranean zone may be withdrawn through the tubing string.
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