The Bit, Unit 1, Lesson 2 (Rotary Drilling) (Rotary Drilling, Unit 1, Lesson 2)

Highly readable in the way it describes various types of bits and their uses. Discusses bit wear and associated problems, along with bit care and maintenance, recordkeeping, and costs. Measurements are given in both U.S. and SI units. Also includes illustrations, summaries, and review questions.