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Footage
| Diamond Glossary (алмазы и бриллианты - глоссарий терминологии) |
The number of feet of borehole drilled per unit of time, or that required to complete a specific project or contract.
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Fluid column, английский
The number of feet of drilling fluid standing in a borehole while the drill is operating and/or the number of feet of drilling fluid remaining in a borehole with the drill string withdrawn.
Blow count, английский
The number of blows that must be de¬livered by a specific-weight, freely falling drive ham¬mer dropping a specific distance to force a drive sampler 12 inches into a soil material.
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