Tricone Bit Copper Porphyry
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Tricone Bit IADC Selection for Copper Porphyry Deposits in the Andes
Andean porphyry Cu (200–320 MPa, CAI 4.5–6.0): use Series 6–7 TCI bits. Sealed bearings (X4/X5/X7) for RC >120 m or CAI >3.5—cut cost/m by ~39%. IADC 637 in oxide zone; 737 below 200–250 m. WOB 8–16 kN, RPM 60–100; ease off at faults. Timely pull prevents cone loss.
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