IADC 1-1-1 → 8-3-7
Tricone bits
Three-cone roller bits
The workhorse — fairly used and new Tricone bits for soft-to-hard formations.
Milled-tooth
Soft / unconsolidated formations
TCI insert
Medium / hard / abrasive formations
Sealed roller bearing
Standard sealed-bearing reliability
Sealed journal bearing
Extended life on long runs













