Method and device for cementing a well or a pipe
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United States of America Patent
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-
Jan 10, 2012
Grant Date -
Jun 18, 2009
app pub date -
Nov 22, 2006
filing date -
Nov 30, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Introducing within a well or pipe a mandrel equipped with an inflatable membrane which can expand radially under the effect of an internal pressure. Positioning the mandrel opposite the portion to be treated, in introducing a pressurized fluid within the membrane such that its end regions form annular bulges pressing firmly against the wall, whereas its mid-region expands to a lesser degree. Forming a peripheral annular space into which is then injected a cement which is liquid but able to harden. Leaving the cement to set so as to form a solid sleeve. Deflating the tubular membrane. Withdrawing the mandrel together with the deflated membrane. The method can be used in the oil sector, particularly for repairing and/or plugging a portion of casing.
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