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Split-ring core lifter
| Diamond Glossary (алмазы и бриллианты - глоссарий терминологии) |
- Spring lifter. =core lifter, q.v. compare split-ring core lifter.
- A hardened steel ring having an open slit, an outside taper, and an inside or outside serrated surface. in its expanded state it allows the core to pass through it freely, but when the drill string is lifted the outside taper surface slides downward into the bevel of the bit or reaming shell, causing the ring to contract and grip tightly the core which it surrounds. also called core catcher, core gripper, core lifter, ring lifter, split-ring lifter, spring lifter. 84 a glossary of the diamond-drilling industry
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Split-ring lifter, английский
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Stationary slip, английский
Split-ring lifter, английский
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