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 |
US8028768(B2) |
申请公布日期 |
2011.10.04 |
申请号 |
US20090405480 |
申请日期 |
2009.03.17 |
申请人 |
SCHLUMBERGER TECHNOLOGY CORPORATION |
发明人 |
HALL DAVID R.;TURNER PAULA;LUNDGREEN DAVID |
分类号 |
E21B43/08;E03B3/18 |
主分类号 |
E21B43/08 |
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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