发明名称 |
Percussion drilling assembly having a floating feed tube |
摘要 |
A percussion drilling assembly for boring into the earth is disclosed. The percussion drilling assembly includes a top sub, a casing coupled to the top sub, and a feed tube assembly disposed within the top sub and the casing. The feed tube assembly includes a non-rigid coupling having a throughbore and a tubular body disposed therein. The tubular body is translatable in the radial position and/or rotatable relative to a longitudinal centerline extending through the non-rigid coupling.
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申请公布号 |
US2009294180(A1) |
申请公布日期 |
2009.12.03 |
申请号 |
US20080127396 |
申请日期 |
2008.05.27 |
申请人 |
SMITH INTERNATIONAL, INC. |
发明人 |
SWADI SHANTANU;UNDERWOOD LANCE;MARSHALL JACK;DEWEY CHARLES;HARRINGTON KEVIN |
分类号 |
E21B1/00 |
主分类号 |
E21B1/00 |
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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