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Collar-in
| Diamond Glossary (алмазы и бриллианты - глоссарий терминологии) |
The act or process of beginning a borehole.
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Electromagnetic prospecting, английский
The act or process of con¬ducting a search for ore bodies, utilizing a geo¬physical method of measuring electromagnetic waves. see electromagnetic survey.
Feed off, английский
The act or process of applying feed pressure to a drill bit by allowing the hoist line to pay out slowly when the drill stem is suspended from the hoist line and rotated by a "kelly." 43
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