Standard design bits targeted at medium to hard formation types. These bits are designed for long shale, limestone and porous sandstone formations. There are many models dedicated to highly interbedded drilling, with some overlap into the F-Series for long intermediate intervals. S-Series options include bits with Twin Cutters, our HA (Hyper-Aggressive) profile, Super Duty gage and many different nozzle options.


5-3/4" S-6133
6-1/2" S-6133
6-3/4" S-6133
7-7/8" S-6133 S-6163D S-6166D S-6166 S-7137
8-1/2" S-5166D S-6166 S-6166D
8-3/4" S-5165 S-5165D S-6163 S-6166 S-6166D S-7136
9-7/8" S-6166D S-7136D
12-1/4" S-6166