发明名称 |
Methods and compositions for cementing wells |
摘要 |
Methods of cementing subterranean zones penetrated by well bores and well cement compositions are disclosed. A well cement composition of the invention basically comprises a hydraulic cement, water in an amount sufficient to form a pumpable slurry and a fluid loss control polymer additive comprising 77.9 weight % of the calcium salt of 2-acrylamido-2-methyl propane sulfonic acid, 8 weight % of the calcium salt of maleic acid, 11 weight % of N-vinyl caprolactam, 3 weight % of 4-hydroxybutyl vinyl ether and 0.1 weight % of methylene bisacrylamide.
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申请公布号 |
US2004159431(A1) |
申请公布日期 |
2004.08.19 |
申请号 |
US20040773632 |
申请日期 |
2004.02.06 |
申请人 |
EOFF LARRY S.;KEENER KRISTA L. |
发明人 |
EOFF LARRY S.;KEENER KRISTA L. |
分类号 |
C04B24/16;C04B24/26;C04B28/02;C04B28/04;C09K8/46;C09K8/487;E21B33/13;(IPC1-7):E21B33/13;E21B33/138 |
主分类号 |
C04B24/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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