WELL CEMENTING METHODS USING COMPOSITIONS CONTAINING LIQUID POLYMERIC ADDITIVES
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United States of America Patent
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-
Jul 31, 2001
Grant Date -
Aug 30, 2001
app pub date -
Jan 7, 2000
filing date -
Jun 9, 1999
priority date (Note) -
Granted
status (Latency Note)
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Abstract
Methods of cementing subterranean zones penetrated by a well bores are provided. In accordance with the methods, a cement composition is prepared comprised of a hydraulic cement, sufficient water to form a slurry and an effective amount of a liquid fluid loss control additive comprised of an emulsion having a copolymer of N,N-dimethylacrylamide and 2-acrylamido-2-methylpropane sulfonic acid or a salt thereof contained therein. The cement composition is placed in a subterranean zone and then allowed to set into a hard impermeable mass therein.
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