Cement compositions comprising lignite-based grafted copolymers and methods of use
    4.
    发明授权
    Cement compositions comprising lignite-based grafted copolymers and methods of use 有权
    包含褐煤基接枝共聚物的水泥组合物和使用方法

    公开(公告)号:US08997866B2

    公开(公告)日:2015-04-07

    申请号:US13436556

    申请日:2012-03-30

    IPC分类号: E21B33/138 C09K8/50

    摘要: A method of cementing in a subterranean formation may comprise: introducing a cement composition comprising cement, water, and a lignite-based copolymer into a subterranean formation, wherein the lignite-based copolymer comprises a lignite backbone, a first grafted monomer selected from the group consisting of -acrylamido-2-methylpropanesulfonic acid, a salt of 2-acrylamido-2-methylpropanesulfonic acid, and a second grafted monomer comprising N,N-dimethylacrylamide; and allowing the cement composition to set in the subterranean formation, wherein cement composition has a transition time of less than or equal to about 150 minutes.

    摘要翻译: 一种在地层中固井的方法可以包括:将包含水泥,水和褐煤基共聚物的水泥组合物引入地层中,其中所述褐煤基共聚物包含褐煤骨架,选自下组的第一接枝单体 由丙烯酰胺基-2-甲基丙磺酸,2-丙烯酰胺基-2-甲基丙磺酸的盐和包含N,N-二甲基丙烯酰胺的第二接枝单体组成; 并且允许水泥组合物固定在地层中,其中水泥组合物具有小于或等于约150分钟的过渡时间。

    Low heat of hydration cement compositions and methods of using same
    6.
    发明授权
    Low heat of hydration cement compositions and methods of using same 有权
    水合水泥组合物的低热量及其使用方法

    公开(公告)号:US08240385B2

    公开(公告)日:2012-08-14

    申请号:US11385426

    申请日:2006-03-21

    IPC分类号: E21B33/13

    摘要: A method of servicing a wellbore in a subterranean formation, comprising preparing a cement composition comprising water and a cementitious material, wherein the cementitious material further comprises blast furnace slag, vitrified shale, calcium sulfate hemi-hydrate or combinations thereof, and placing the cement composition in the wellbore. A cement composition comprising water and a cementitious material, wherein the cementitious material further comprises blast furnace slag, vitrified shale, calcium sulfate hemi-hydrate or combinations thereof. A cement composition comprising water and a cementitious material, wherein the cementitious material further comprises blast furnace slag.

    摘要翻译: 一种在地下地层中维护井筒的方法,包括制备包含水和水泥质材料的水泥组合物,其中所述水泥质材料还包括高炉矿渣,玻璃化页岩,硫酸钙半水合物或其组合,以及将水泥组合物 在井筒里 一种包含水和水泥质材料的水泥组合物,其中所述水泥质材料还包括高炉矿渣,玻璃化页岩,硫酸钙半水合物或其组合。 一种包含水和水泥质材料的水泥组合物,其中所述胶结材料还包括高炉矿渣。