CORE LIFTER |
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| 申请号 | EP10828992 | 申请日 | 2010-11-03 | 公开(公告)号 | EP2496788A4 | 公开(公告)日 | 2017-06-28 |
| 申请人 | LONGYEAR TM INC; | 发明人 | DRENTH CHRISTOPHER L; ZHANG HONGYAN; | ||||
| 摘要 | A core lifter and method for making same for use in a drilling system. The core lifter can include a tubular body having an exterior surface and an interior surface and can have a plurality of longitudinally-oriented recesses formed in the exterior surface of the tubular body of the core lifter and extending radially inwardly relative to the central axis of the core lifter. The plurality of longitudinally-oriented recesses formed in the exterior surface of the tubular body of the core lifter can extend along at least 50 percent of the length of the core lifter. | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
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