| 发明名称 |
Fremgangsmåte for estimering av pumpevirkningsgrad |
| 摘要 |
The present invention provides highly accurate methods for directly calculating pump fillage which avoid the need and expense of a pump dynamometer card and subsequent calculations. |
| 申请公布号 |
NO337765(B1) |
申请公布日期 |
2016.06.20 |
| 申请号 |
NO20060002994 |
申请日期 |
2006.06.27 |
| 申请人 |
WEATHERFORD TECHNOLOGY HOLDINGS, LLC |
发明人 |
MILLS THOMAS M |
| 分类号 |
E21B43/00;F04B47/02;F04B49/02 |
主分类号 |
E21B43/00 |
| 代理机构 |
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