JOINTED SPEARHEAD ASSEMBLY |
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| 申请号 | EP09747678 | 申请日 | 2009-05-15 | 公开(公告)号 | EP2274500A4 | 公开(公告)日 | 2017-07-19 |
| 申请人 | LONGYEAR TM INC; | 发明人 | DRENTH CHRISTOPHER L; IBRAHIM GEORGE; LACHANCE ANTHONY; | ||||
| 摘要 | A jointed spearhead assembly can include a base portion that is adapted to be connected to a down-hole object and a spearhead portion having a first end and a second. The second end includes a follower tab with a non-convex first follower interface. The spearhead portion can be pivotally coupled to the base portion. | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
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