| 发明名称 |
Displaceable Plug in a Tool String Filter |
| 摘要 |
A filter for a drill string comprises a perforated receptacle having an upper end and a lower end. The upper end of the filter comprises a drilling mud intake, and the lower end of the filter comprises an opening. A displaceable plug is seated on the opening at the lower end.
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| 申请公布号 |
US2010236833(A1) |
申请公布日期 |
2010.09.23 |
| 申请号 |
US20090405480 |
申请日期 |
2009.03.17 |
| 申请人 |
HALL DAVID R;TURNER PAULA;LUNDGREEN DAVID |
发明人 |
HALL DAVID R.;TURNER PAULA;LUNDGREEN DAVID |
| 分类号 |
E21B21/00;E21B7/00;E21B27/00 |
主分类号 |
E21B21/00 |
| 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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