Delayed thixotropic cement compositions and methods
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United States of America Patent
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Aug 26, 2003
Grant Date -
Sep 26, 2002
app pub date -
Apr 4, 2002
filing date -
Jul 7, 2000
priority date (Note) -
Expired
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Abstract
Delayed thixotropic cement compositions and methods of cementing in subterranean zones penetrated by well bores are provided. The novel cement compositions are basically comprised of a hydraulic cement, sufficient water to form a slurry and a water soluble delayed thixotropy imparting additive selected from the group consisting of carbonic acid and alkali metal carbonates.
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