Selection
Choosing the Right Tricone Bit in Guyana
The starting point for any tricone selection is the IADC code, which classifies a roller cone bit by formation hardness, cutting structure and bearing type. Matching the code to your offset data — soft, medium or hard, milled-tooth or insert — is what separates a fast, economical run from a premature trip. Our team works from your formation tops and bit records to recommend the IADC grade, hydraulics and gauge protection that fit the interval. The full method is laid out in our IADC code selection guide.
Bearing choice is the next decision. Sealed journal bearings retain lubricant and exclude solids, giving longer life and predictable performance in deeper, hotter and more abrasive sections — the configuration most offshore and hard-rock work calls for. Open roller bearings cost less and suit shallower, cooler holes and air-flush quarry duty where bit life is naturally shorter. Cutting structure follows the same logic: tungsten carbide insert (TCI) bits excel in hard, abrasive rock and longer runs, while milled-tooth steel bits are more economical and aggressive in soft, fast-drilling formations.
For sections beyond the reach of roller cones — long, hard, directional intervals where rate of penetration and footage are paramount — fixed-cutter bits take over. Explore our PDC bits for those applications, or our mining & blast-hole bits for hard-rock and quarry programs in the hinterland. Whichever route the well takes, VBM Guyana matches the bit to the formation and supplies it as registered MRO and drilling consumables.