What are the different types of rotary drill bits and how are they used in various drilling applications?

There are several types of rotary drill bits used in drilling applications, including roller cone bits, fixed cutter bits, and diamond bits. Roller cone bits have rotating cones with teeth that crush the rock, while fixed cutter bits have blades that shear the rock. Diamond bits use industrial diamonds to cut through hard formations. These different types are used based on the type of rock or formation being drilled through, with roller cone bits being versatile, fixed cutter bits used for harder formations, and diamond bits for very hard formations.