Very good performance well drilling bit, high downhole speed and long working life Payment terms: ... : 60mm,65mm,76mm,93mm,95mm,98mm(3 7/8”), 114mm,118mm(4 5/8”),120mm(4 3/4”),127mm(5”)133.3mm(5 1 ... 7/8”)215.9mm(8 1/2”),222.2mm(8 3/4”) 241.3mm(9 1/2”),244.4mm(9 5 ... .0mm (13 5/8”),349.2mm(13 3/4”)374.6mm(14 3/4”)381mm(15”),393.7m(15 1/2”),406. ... 627,637,737512,522,532,612,622,632,732Tricone bit 4 5/8"IADC537G