| 发明名称 |
Additive for controlling cement slurry rheology |
| 摘要 |
A cement composition for use in a wellbore comprising a cement blend and at least two polyvinylalcohols wherein the polyvinylalcohols have different degrees of hydrolysis such that the rheology of the cement slurry capable of being formed from the composition is stable during temperatures changes.
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| 申请公布号 |
US8469094(B2) |
申请公布日期 |
2013.06.25 |
| 申请号 |
US20080740265 |
申请日期 |
2008.10.09 |
| 申请人 |
DROCHON BRUNO;SCHLUMBERGER TECHNOLOGY CORPORATION |
发明人 |
DROCHON BRUNO |
| 分类号 |
E21B33/13;C04B7/36;C09K8/42 |
主分类号 |
E21B33/13 |
| 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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