摘要 |
A cement composition comprising water, a cement, and a fluid loss control additive, the fluid loss control additive comprising a graft copolymer. The graft copolymer comprises a backbone and at least four grafted monomers selected from the group consisting of 2-acrylamido-2-methylpropanesulfonic acid, acrylamide, acrylic acid, vinylphosphonic acid, diallyldimethylammonium chloride, and salts thereof. The backbone of the graft copolymer comprises a humic acid salt. The cement compositions may be used in cementing operations. |
申请人 |
HALLIBURTON ENERGY SERVICES, INC.;CURTIS, PHILIP, ANTHONY;LEWIS, SAMUEL, J.;CHATTERJI, JITEN;KING, BOBBY, J.;BRENNEIS, DARRELL, CHAD |
发明人 |
LEWIS, SAMUEL, J.;CHATTERJI, JITEN;KING, BOBBY, J.;BRENNEIS, DARRELL, CHAD |