发明名称 |
Deep drilling tool drive assembly of tubular form - in which a residual core can grow within a core pipe which extends through the pipe |
摘要 |
Drive assembly for a deep drilling tool is of tubular form so that, when using an annular drill bit (1), a residual core (2) can grow within a core pipe (3) which extends through the drive. Pref. the core pipe is replaceable by a plugging tube which closes the core pipe channel to permit full-section drilling. A harmonic drive transmission or a planetary transmission is pref. used as the torque transmission. The drive is pref. a turbine operated by drilling mud circulation. USE/ADVANTAGE - Used esp. in rotary core drilling using a downhole drive, e.g. for the German Continental Deep Drilling Programme. The design combines the advantages of the progressive core drilling technique with those of a downhole drill bit drive, while allowing directional drilling and even plugging of the core pipe channel for full-section drilling.
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申请公布号 |
DE4231025(A1) |
申请公布日期 |
1994.03.24 |
申请号 |
DE19924231025 |
申请日期 |
1992.09.17 |
申请人 |
WOLFRUM, WERNER, 8580 BAYREUTH, DE |
发明人 |
WOLFRUM, WERNER, 8580 BAYREUTH, DE |
分类号 |
E21B4/00;E21B25/00;E21B41/00;(IPC1-7):E21B4/14 |
主分类号 |
E21B4/00 |
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代理人 |
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主权项 |
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地址 |
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