Downhole drilling assembly |
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申请号 | EP13184646.1 | 申请日 | 2010-03-19 | 公开(公告)号 | EP2677113A3 | 公开(公告)日 | 2015-12-30 |
申请人 | Halliburton Energy Services, Inc.; | 发明人 | Downie, Andrew McPherson; Vitale, Pascal Michel; Boussi, Bachar; | ||||
摘要 | A downhole stabiliser (5), such as a drill motor stabiliser, comprises at least one reaming means and/or reinforcing means (10). The present invention also relates to an assembly (30), such as a downhole drilling assembly (31), comprising at least one such stabiliser (5) and/or a drill bit (40,41) comprising a gauge bit (42) at or near a drilling end (45) thereof, and a connection means (46) for connecting the drill bit (40,41) to a drill motor assembly (60), wherein the drill bit gauge (42) comprises a substantially cylindrical portion having a length less than or equal to approximately 1.0 times the nominal bit diameter. The present invention also relates to a novel locking mechanism (80), such as a lock and key mechanism, to allow locking of a shaft (70'), e.g. a motor drive shaft (71'), through or together with a stabiliser (5'). |
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