| 发明名称 |
METHOD AND APPARATUS FOR DIRECTIONAL DRILLING |
| 摘要 |
<p>The present invention is directed at a pullhead/reamer for use in digging a hole in the ground; comprising a first end (22) shaped to receive a mandrel struts, connecting the first end to the second end, the struts defining a set of open flutes (48) therewithin; and a set of slurry jets (50); wherein when the pullhead/reamer is in use, the set of slurry jets release a pressurized liquid to mix with the ground producing a slurry which enters the pullhead/reamer via the open flutes.</p> |
| 申请公布号 |
WO2005056971(A1) |
申请公布日期 |
2005.06.23 |
| 申请号 |
WO2003CA01921 |
申请日期 |
2003.12.11 |
| 申请人 |
ROTH, RAYMOND, G.;LAKING, ROGER |
发明人 |
ROTH, RAYMOND, G.;LAKING, ROGER |
| 分类号 |
E21B7/28;E21B10/26;E21B21/00;(IPC1-7):E21B7/28 |
主分类号 |
E21B7/28 |
| 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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