Method of using humic acid grafted fluid loss control additives in cementing operations
    4.
    发明授权
    Method of using humic acid grafted fluid loss control additives in cementing operations 有权
    在固井作业中使用腐殖酸接枝失水控制添加剂的方法

    公开(公告)号:US07523784B2

    公开(公告)日:2009-04-28

    申请号:US11652215

    申请日:2007-01-11

    IPC分类号: E21B33/13

    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.

    摘要翻译: 水泥组合物的示例性实施方案包括水,水泥和流体损失控制添加剂,所述流体损失控制添加剂包含接枝共聚物。 接枝共聚物包括主链和至少四种选自2-丙烯酰胺基-2-甲基丙磺酸,丙烯酰胺,丙烯酸,乙烯基膦酸,二烯丙基二甲基氯化铵及其盐的接枝单体。 接枝共聚物的骨架包括腐殖酸盐。 还提供了使用水泥组合物的示例性实施方案的固井方法。

    Method of using lignite grafted fluid loss control additives in cementing operations
    8.
    发明授权
    Method of using lignite grafted fluid loss control additives in cementing operations 有权
    在固井作业中使用褐煤接枝失液控制添加剂的方法

    公开(公告)号:US07360598B1

    公开(公告)日:2008-04-22

    申请号:US11702342

    申请日:2007-02-05

    IPC分类号: E21B33/13

    摘要: Methods of cementing in a subterranean formation are provided. An exemplary embodiment comprises introducing a cement composition into a subterranean formation. The cement composition comprises water, a cement and a fluid loss control additive comprising a graft polymer. The graft polymer comprises a backbone comprising a lignite. The graft polymer further comprises grafted monomers selected from the group consisting of 2-acrylamido-2-methylpropanesulfonic acid, acrylamide, acrylic acid, vinylphosphonic acid, diallyldimethylammonium chloride and salts thereof.

    摘要翻译: 提供了在地层中固井的方法。 一个示例性的实施方案包括将水泥组合物引入地层中。 水泥组合物包含水,水泥和包含接枝聚合物的失水控制添加剂。 接枝聚合物包含包含褐煤的主链。 接枝聚合物还包括选自2-丙烯酰胺基-2-甲基丙烷磺酸,丙烯酰胺,丙烯酸,乙烯基膦酸,二烯丙基二甲基氯化铵及其盐的接枝单体。