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Impervious bed
| Diamond Glossary (алмазы и бриллианты - глоссарий терминологии) |
A bed or stratum through which water, gas, or petroleum will not move under ordinary hydrostatic pressure.
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Hydrostatic, английский
Гидростатический
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Impression block, английский
A bell-shaped or hollow, tubular device filled with wax or other water-resistant plastic materials, which is lowered onto an article resting on the bottom of a borehole. the plastic material molds itself about the lost article, and by inspecting the impression so formed the driller can determine which fishing tool is best fitted to recover the lost article.
Hydraulic chuck, английский
A diamond-drill rod chuck having jaws with clamping and unclamping movements actuated hydraulically instead of by hand-turned setscrews. also called automatic chuck.
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