- fluted drill collar
- утяжелённая бурильная труба (со спиральной канавкой на поверхности для снижения возможности прилипания к стенкам ствола скважины)* * *утяжеленная бурильная труба
Англо-русский словарь нефтегазовой промышленности. 2011.
fluted drill collar
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