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US 9,475,975 B2Granted
Defoaming compositions and processes for cementing applications
AssigneeKemira Oyj
InventorsAmir H. Mahmoudkhani, Robert E. Wilson, Luciana Bava, Jacob A. Rocker
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Abstract
Cement compositions and processes for reducing air entrainment in a cement composition generally include mixing a hydraulic cement with a defoamer composition including an organic acid ester of a polyoxyethylene-polyoxypropylene block copolymer.
Claims17
A process for reducing air entrainment in a cement composition, the process comprising:
- adding a defoaming composition to a cement composition, wherein the defoaming composition comprises an organic acid ester of a polyoxyethylene-polyoxypropylene block copolymer;
- and
- reducing air entrainment in the cement composition relative to a cement composition without the defoaming composition;
- wherein the polyoxyethylene-polyoxypropylene organic acid ester is a diesterification reaction product of a polyoxyethylene-polyoxypropylene block copolymer and oleic acid;
- and
- wherein the organic acid ester of the polyoxyethylene-polyoxypropylene block copolymer is of the general structure:
- wherein R is (CH2)7CH═CH(CH2)7CH3;
- a is 2 to 8;
- and
- b is 16 to 67.
7 more elements
A cement composition comprising:
- hydraulic cement;
- water;
- and
- a defoaming composition comprising an organic acid ester of a polyoxyethylene-polyoxypropylene block copolymer;
- wherein the polyoxyethylene-polyoxypropylene organic acid ester is a diesterification reaction product of a polyoxyethylene-polyoxypropylene block copolymer and oleic acid;
- and wherein the organic acid ester of the polyoxyethylene-polyoxypropylene block copolymer is of the general structure:
- wherein R is (CH2)7CH═CH(CH2)7CH3;
- a is 2 to 8;
- and
- b is 16 to 67.
7 more elements
A method of cementing a subterranean formation, comprising:
- displacing a cement composition into the subterranean formation, the cement composition comprising hydraulic cement, water;
- and a defoaming composition comprising an organic acid ester of a polyoxyethylene-polyoxypropylene block copolymer;
- and
- allowing the cement to set;
- wherein the polyoxyethylene-polyoxypropylene organic acid ester is a diesterification reaction product of a polyoxyethylene-polyoxypropylene block copolymer and oleic acid;
- and wherein the organic acid ester of the polyoxyethylene-polyoxypropylene block copolymer is of the general structure:
- wherein R is (CH2)7CH═CH(CH2)7CH3;
- a is 2 to 8;
- and
- b is 16 to 67.
7 more elements
Dependencies are inferred from the claim text.