Methods and compositions for sealing subterranean zones
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United States of America Patent
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Sep 9, 2003
Grant Date -
Jul 3, 2003
app pub date -
Dec 11, 2001
filing date -
Dec 11, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Methods and compositions for sealing subterranean zones penetrated by well bores are provided. The methods basically comprise the steps of introducing a sealing composition into the subterranean zone comprised of a hydraulic cement, sufficient water to form a slurry and a rapidly acting thixotropy providing gelling agent, and allowing the sealing composition to remain at rest in the zone whereby the sealing composition rapidly gels and then sets into a hard impermeable mass therein.
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