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Drilling Parameters Q™ Wireline Size BQ™ NQ™ HQ™ PQ™ Speed (rpm) 1,200 950 750 600 Indicative Bit Weight Range Imperial Measurement Low (lbf) 2,000 3,000 4,500 7,000 High (lbf) 5,500 8,500 12,500 19,000 Metric Measurement Low (kN) 9 13 20 31 High (kN) 24 37 56 84 Fluid Flow Range Imperial Measurement Low (gpm) 6 10 14 20 High (gpm
BQ HQ NQ PQ Core Bits & Accessories for Mining, Exploration Core Drilling . Core Bits & Accessories. Core bits are engineered with water ways that allow easy removal of cutting debris. The center hole of the Core bit removes sediment rock and allows the core pedestal to pass through the bit and into the core
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Diamond Impregnated Core Drill Bit BQ NQ HQ PQ. Depending on the range of application as well as the cutting media on the core bits, ROSCHEN makes different types of core bits: Impregnated Diamond Type. Surface set Diamond Type. Tungsten Carbide Type. PDC Type. PCD Type. Electroplated Diamond Type. Generally, an overall Drilling System consist