Apparatus and method for sealing perforated well casing
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United States of America Patent
Stats
-
Mar 25, 1997
Issued Date -
N/A
app pub date -
May 23, 1995
filing date -
Jul 29, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Perforations and other openings in well casings, liners and other conduits may be substantially blocked or sealed to prevent fluid flow between the casing or liner interior and an earth formation by placing a radially expansible sleeve adjacent the perforations or openings and urging the sleeve into forcible engagement with the casing or inner wall using an explosive charge. An apparatus including a radially contracted sleeve formed by a coiled plate member or a tubular member having flutes defined by external and internal folds, may be deployed into a well casing or liner through a production or injection tubing string and on the end of a flexible cable or coilable tubing. An explosive charge disposed on the apparatus and within the sleeve may be detonated to urge the sleeve into forcible engagement with the casing inner wall.
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