发明名称 |
DRILLING HEAD FOR REBORING A STUCK VALVE |
摘要 |
<p>The present invention relates to a drilling head (2) for reboring a stuck valve (35) or drilling into the formation downhole (36). The invention furthermore relates to a drilling tool (1) comprising the drilling head and a driving unit (9). The drilling head comprises a hole saw (28) beside a drill bit for cutting out a piece (37) from the stuck valve. Furthermore, the invention relates to a drilling system comprising the drilling tool and a driving tool for moving the drilling tool downhole; a method of drilling; and a use of the drilling head.</p> |
申请公布号 |
CA2685063(C) |
申请公布日期 |
2015.07.21 |
申请号 |
CA20082685063 |
申请日期 |
2008.02.28 |
申请人 |
WELLTEC A/S |
发明人 |
HALLUNDBAEK, JORGEN;JENSEN, SVEND KARSTEN;ANDERSEN, THOMAS SUNE |
分类号 |
E21B11/00;E21B10/26;E21B29/00;E21B34/06 |
主分类号 |
E21B11/00 |
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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