ROTARY DOWNHOLE TOOL |
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| 申请号 | US15548456 | 申请日 | 2016-01-28 | 公开(公告)号 | US20180238117A1 | 公开(公告)日 | 2018-08-23 |
| 申请人 | NOV Downhole Eurasia Limited; | 发明人 | Haydn G. Smith; Graham Watson; | ||||
| 摘要 | A rotary downhole tool, for example in the form of a drill bit, is described that includes a tool body, the body defining a gauge region, and at least one gauge roller rotatably mounted to the body. | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
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