4 1/2″ NEW 117/217 Tricone Drill Bit 2 3/8″ API Construction, Geotechnical, Geothermal, Industries, Mining, Oil and Gas, Waterwell Skills Posted on July 22, 2021 ← 3 5/8″ NEW 117/217 Tricone Drill Bit 2 3/8″ API 4 5/8″ NEW 117/217 Tricone Drill Bit 2 7/8″ API →
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