1/2"~36"API MT Mill tooth tri-cone rock bit for Oil/Gas/Water Drilling
Bit Size：12 1/4 inch (311.15mm)
IADC Code: 217
WOB： 155～325（KN）
Ideal WOB Range：185～280（KN）
Rotary Speed： 200～40 （rpm）
Ideal Rotary Speed Range：160～80（rpm）
The above parameters are only for reference. Optimized parameters are determined by drilling process and lithology of formations on site.
Design Features:
1-Metal face sealed journal bearing
2-Cutting structure
3-Reinforced bit head OD
4-Hardfacing on shirttail
Applicable Formations：
Medium hard with relatively higher compressive strength and hard stringers, such as shale ,clay ,sandstone and limestone, etc.
