Tungsten Carbide Insert (TCI) or Insert bits
Tungsten Carbide Insert (TCI) or Insert bits generally have tungsten carbide inserts (teeth) that are pressed into the bit cones. The inserts have several shapes such as long-extension shapes, round shaped inserts, etc.
Teeth of the bits are different depending on the formation as follows:
Soft formation: Long-extension, chisel shape inserts
Hard formation: Short-extension, rounded inserts
Fixed Cutter Bits
Fixed cutter bits consist of bit bodies and cutting elements integrated with the bit bodies. The fixed cutter bits are designed to excavate holes by shearing formations rather than chippingor gouging formations, like rolling cutter bits. These bits do not have moving parts such as cones or bearings. The components of bits are composed of bit bodies fabricated from steel or tungsten carbide matrix and fixed blades integrated with abrasion-resistant cutters. The cutters in the bits that are available on the market are Polycrystalline Diamond Cutters (PDC) and natural or synthetic diamond cutters.