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Wedge core lifter
| Diamond Glossary (алмазы и бриллианты - глоссарий терминологии) |
A core-gripping device consisting of a series of three or more serrated-face, tapered wedges contained in slotted and tapered recesses cut into the inner surface of a lifter case or sleeve. the case is threaded to the inner tube of a core barrel. as the core enters the inner tube, it lifts the wedges up along the case taper. when the barrel is raised, the wedges are pulled tight, gripping the core.
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Wedge-set, английский
A diamond bit the crown of which is cov- 94 a glossary of the diamond-drilling industry ered with wedge-shaped configurations in each of which is an inset diamond.
Water-cutoff core barrel, английский
A core barrel having a device in its head part that closes and stops the flow of drill-circulation liquid when a core block occurs in the inner tube of the core barrel.
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