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Bottom-hole
| Diamond Glossary (алмазы и бриллианты - глоссарий терминологии) |
A point at, or near, the bottom of a borehole.
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Gas sand, английский
- A porous stratum of rock in which a gas is entrapped; the gas escapes when the stratum is penetrated by a borehole.
- A stratum of sand or porous sandstone from which natural gas is obtained.
Rose-bit pilot, английский
A plug to keep a rose bit concentric while milling off hall-rowe deflecting-wedge top ring or rose-bit dropper.
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