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. |
申请公布号 |
US8651202(B2) |
申请公布日期 |
2014.02.18 |
申请号 |
US201113090820 |
申请日期 |
2011.04.20 |
申请人 |
SWADI SHANTANU;UNDERWOOD LANCE;MARSHALL JACK;DEWEY CHARLES;HARRINGTON KEVIN;SMITH INTERNATIONAL, INC. |
发明人 |
SWADI SHANTANU;UNDERWOOD LANCE;MARSHALL JACK;DEWEY CHARLES;HARRINGTON KEVIN |
分类号 |
E21B4/14 |
主分类号 |
E21B4/14 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|