1/2"~26"API TCI Bit Insert tooth tri-cone rock bit for Oil/Gas/Water Drilling
Bit Size：8 1/2 inch (215.9mm)
IADC Code: 537
WOB：85～ 225（KN）
Ideal WOB range：130～195（KN）
Rotary speed： 110～40 （rpm）
Ideal Rotary speed range：100～60（rpm）
The above parameters are only for reference. Optimized parameters are determined by drilling process and lithology of formations on site.
Design Features:
1-Rubber O-ring sealed journal bearing
2-Optimized cutting structure
3-Hardfacing on shirttail
4-Reinforced bit head OD
Applicable Formations：
Medium soft with low compressive strength and hard abrasive stringers, such as hard shale , hard gypsolyte, soft limestone, sandstone and dolomite with stringers, etc.
