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Ball and socket reamer
| Diamond Glossary (алмазы и бриллианты - глоссарий терминологии) |
A borehole-reaming device consisting of a bit attached to a ball-and-socket or knuckle-joint member, which in turn is connected to the drill rods and used in borehole-deviation drilling. also called arc cutter.
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Blackstrap, английский
- A black, heavy oil sometimes used as a drill-rod dope or lubricant and as a mine-car-wheel lubricant. also called blackjack.
- Дешевый портвейн или ром, смешанный с патокой bla – blo
Bailing tub, английский
A container into which the contents of a bailer are emptied.
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