Tandem spacer fluid system and method for positioning a cement slurry in a wellbore annulus
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United States of America Patent
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May 20, 2003
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N/A
app pub date -
Jul 17, 2001
filing date -
Aug 12, 1999
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Abstract
A method and a tandem spacer consisting of an aqueous lead spacer fluid and an aqueous tail spacer fluid for displacing a drilling fluid from an annular space in a wellbore with a cement slurry is disclosed. The aqueous lead spacer fluid and the aqueous tail spacer fluid are formulated to minimize mixing between a displaced drilling fluid and a cement slurry and to clean contaminants from the annular space.
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