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Reliever
| Diamond Glossary (алмазы и бриллианты - глоссарий терминологии) |
- Gage stone,
- Pressure-relief valve,
- Relief hole, see relief hole 2.
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Retaining ring, английский
- A shoulder inside a reaming shell that prevents entry of the core lifter into the core barrel.
- A term sometimes incorrectly applied to a core lifter.
- A soft steel ring between the races of a ball bear ing to maintain the correct distribution of the balls in the races.
Relief hole, английский
- A port or passageway through which the core, as it advances into the inner tube of a double-tube core barrel, forces water out of the inner tube to the outside of the barrel through the inner-tube head.
- A borehole drilled ahead of underground openings to tap and drain a water-bearing formation. also called cover hole, pilot hole.
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