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Suitable for drilling operation in soft to very hard formations (f=1~10).

? Selection (unit: mm)

Coring: F60/41.5, F75/54.5, F94/68, F113/88, F133/108, F146/102, F146/102, F146/68, F153/128, F156/102

Non-coring: F56, F60, F65, F75, F94, F113, F133, F153,F171.4, F193

Reaming: F153/94, F53/113, F193/113, F193/153

Bits for CBM: 3-7/8'', 4'', 4-5/8'', 4-7/8'', 5-7/8'', 6'', 8-1/2''