| 发明名称 |
EXPANDING ADDITIVE FOR CEMENT COMPOSITION |
| 摘要 |
Deadburned magnesium oxides (calcined at a temperature of above about 4000.degree.F) can be advantageously utilized as an expanding additive in cements utilized to seal a metallic casing into the bore hole of a well. The deadburned magnesium oxide additives are particularly effective when used in cements having a curing temperature of about 120-200.degree.C a nd particularly at temperatures greater than about 150.degree.C.
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| 申请公布号 |
CA2224201(C) |
申请公布日期 |
2005.05.24 |
| 申请号 |
CA19972224201 |
申请日期 |
1997.12.09 |
| 申请人 |
NALCO/EXXON ENERGY CHEMICALS, L.P. |
发明人 |
CHEUNG, PING-SUN |
| 分类号 |
C04B2/10;C04B14/30;C04B22/00;C09K8/46;(IPC1-7):E21B33/13;C04B20/00 |
主分类号 |
C04B2/10 |
| 代理机构 |
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| 主权项 |
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