发明授权
US07842652B2 Cement compositions comprising humic acid grafted fluid loss control additives 有权
包含腐殖酸接枝失水控制添加剂的水泥组合物

Cement compositions comprising humic acid grafted fluid loss control additives
摘要:
Exemplary embodiments of the cement compositions comprise 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. Methods of cementing using exemplary embodiments of the cement compositions are also provided.
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