| 发明名称 |
Ampholytic polymers for use as filtration control aids in drilling muds |
| 摘要 |
The instant invention is directed to an aqueous drilling fluid comprising an aqueous clay dispersion and a carboxylic functional polyampholyte, or the salt thereof. The instant invention is also directed to the use of the drilling fluid.
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| 申请公布号 |
US4455240(A) |
申请公布日期 |
1984.06.19 |
| 申请号 |
US19810331101 |
申请日期 |
1981.12.15 |
| 申请人 |
CALGON CORPORATION |
发明人 |
COSTELLO, CHRISTINE A. |
| 分类号 |
C08F20/00;C02F5/00;C02F5/08;C02F5/10;C02F5/12;C02F5/14;C08F20/52;C08F120/04;C08F220/04;C08F220/06;C08F220/54;C08F220/56;C09K8/14;C09K8/60;C23F11/173;C23F14/02;(IPC1-7):C09K7/02 |
主分类号 |
C08F20/00 |
| 代理机构 |
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