DOWNHOLE MILLS AND IMPROVED CUTTING STRUCTURES |
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| 申请号 | PCT/US2013061556 | 申请日 | 2013-09-25 | 公开(公告)号 | WO2014052372A3 | 公开(公告)日 | 2014-11-27 |
| 申请人 | NAT OILWELL DHT LP; WRIGHT CHARLES LEONARD II; SRESHTA HAROLD A; SUE JIINJEN ALBERT; | 发明人 | WRIGHT CHARLES LEONARD II; SRESHTA HAROLD A; SUE JIINJEN ALBERT; | ||||
| 摘要 | A drill bit (10) for cutting through a downhole metal structure includes a bit body (12) having a central axis (11) and a bit face (20). The bit body is configured to rotate about the central axis in a cutting direction. In addition, the bit includes a cutting structure (15) disposed on the bit face. The cutting structure includes a plurality of circumferentially spaced blades (16) and a plurality of primary cutter elements (40) mounted to each blade. Each primary cutter element has a forward- facing primary cutting face (44). Each primary cutter element is made of a whisker ceramic composite. | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
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