DOWNHOLE HOLE CLEANING JOINTS AND METHOD OF USING SAME |
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| 申请号 | US15031670 | 申请日 | 2014-10-22 | 公开(公告)号 | US20160237764A1 | 公开(公告)日 | 2016-08-18 |
| 申请人 | NATIONAL OILWELL VARCO, L.P.; | 发明人 | Michael Joseph Jellison; Guillaume Plessis; Andrei Muradov; John Forester Price; Stephen C. Hain; | ||||
| 摘要 | A hole cleaning joint for a drill string is deployed into a wellbore penetrating a subterranean formation. The hole cleaning joint includes a tubular body connectable to the drill string and a hole cleaning section positionable about the tubular body. The hole cleaning section has an outer surface engageable with a wall of the well bore. The outer surface has spiral grooves extending therein defining blades therebetween, and an uphole end and a downhole end with a spiral cavity therebetween. The spiral cavity has a width that decreases towards the uphole end of the spiral cavity to define a tapered flow channel to receive cuttings therethrough whereby uphole movement of cuttings is facilitated during drilling. | ||||||
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| 说明书全文 | |||||||
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