Compositions and methods for well cementing
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United States of America Patent
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Jul 19, 2016
Grant Date -
Nov 24, 2011
app pub date -
Apr 28, 2011
filing date -
May 3, 2010
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Abstract
Organic compounds containing at least one nitrogen atom are particularly suitable as retarders for geopolymeric systems employed as well cements. Preferred compounds include aminated polymers, amine phosphonates, quaternary ammonium compounds and tertiary amines. The geopolymeric compositions are suitable for primary cementing and remedial cementing operations. The preferred temperature range within which the retarders operate is between about 20° C. and 120° C.
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