| 发明名称 |
Method and apparatus for providing proportional injection of additives into drilling fluids |
| 摘要 |
Injection of a drilling fluid additive into a drilling fluid, as the drilling fluid is being pumped into a bore hole, in direct proportion to the amount of drilling fluid being pumped.
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| 申请公布号 |
US6216801(B1) |
申请公布日期 |
2001.04.17 |
| 申请号 |
US19980054780 |
申请日期 |
1998.04.03 |
| 申请人 |
AMERICAN POLYWATER CORPORATION |
发明人 |
JONNES NELSON |
| 分类号 |
C09K8/24;E21B21/06;(IPC1-7):E21B21/08 |
主分类号 |
C09K8/24 |
| 代理机构 |
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代理人 |
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| 地址 |
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