DIAMOND CORE DRILLING REFERENCE - Boart Longyear
PQ™3, PQTT Core Dia. (in) 1.775 2.406 3.270 Bit OD STD (in) 2.965 3.763 4.805 Bit OD RSG (in) 2.980 3.782 4.827 Bit OD OS (in) 3.032 3.830, 3.895 4.950 Hole Volume (gal/100 ft) 36.3 58.3 95.1 Metric Measurement Size NQ™3, NQTT HQ™3, HQTT PQ™3, PQTT Core Dia. (mm) 45.1 61.1 83.1 Bit OD STD (mm) 75.3 95.6 122.0 Bit OD RSG (mm) 75.7 96.1 122.6
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