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Drivehead
| Diamond Glossary (алмазы и бриллианты - глоссарий терминологии) |
- A heavy iron cap or annular coupling fitted to top of pipe or casing to receive and protect the casing from the blow delivered by a drive block when casing or pipe is driven through overburden or other material. also called drive cap, driving cap.
- The swivel head of a diamond- or rotary-drill machine.
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Overburden, английский
- Вскрышной слой (поверхностный слой грунта, удаляемый перед открытой добычей угля)
- Перегружать
- Clay, sand, boulder clay, and other un-consolidated materials overlying bedrock. also called burden, cover, drift, mantle, surface.
- The worthless material covering a body of useful mineral.
- Вскрышной слой грунта; вскрышная порода; перегрузка, чрезмерная нагрузка
- (a) the upper part of a sedimentary deposit, compressing and consolidating the materials below. (b) the loose soil or other unconsolidated material overlying bedrock, either transported or formed in place (synonym for regolith). gg
- Overlying rock, or soil.
- The soil and rock supported by the roof of a tunnel.
- Вскрыша
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Dry sampler, английский
- Various auger and/or tubular devices designed to obtain unwetted samples of soft rock material such as clay, sand, soil, etc., by drilling procedures wherein water or other fluid is not circulated during the operation. compare drive sampler.
- A person skilled in the art of dry sampling.
Drive collar, английский
- Extra thick walled pipe or casing coupling against which the blow of a drive block is delivered when driving or sinking drivepipe or casing.
- An oversize rod or casing coupling on which the blows of a drive block are delivered when casing is being driven or an attempt is being made to jar loose stuck casing or a drill-rod string.
- Incorrectly used as a synonym for drive shoe,
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