Boyun Guo is a Professor at the University of Louisiana at Lafayette in the Petroleum Engineering Department and Director of the Center for Optimization of Petroleum Systems (COPS) of the Energy Institute of Louisiana (EIL). He has 40 years of work experience in the oil and gas industry and academia. He is the principal author of 11 books and author/coauthor of over 150 research papers. He holds a BS degree in Engineering Science from Daqing Petroleum Institute in China, MS degree in Petroleum Engineering from Montana College of Mineral Science and Technology, and a PhD degree in Petroleum Engineering from New Mexico Institute of Mining and Technology.
Gefei Liu is the founder and president of Pegasus Vertex, Inc., a drilling software company in Houston, Texas. He received his BS degree from the University of Science and Technology of China in 1987 and an MS degree from the University of Texas at Austin in 1991. Gefei has published more than 20 technical articles on various drilling engineering topics and one book published by Elsevier titled Applied Drilling Circulation Systems with Prof. Boyun Guo. Mr. Liu was nominated for the SPE (Society of Petroleum Engineers) Drilling Engineering Award in 2012. In May 2018, Gefei, together with his colleague Dr. Hu Dai, was awarded the Meritorious Awards for Engineering Innovation by Hart's Energy for developing the CEMPRO+ computer model.

Part One: Liquid Drilling Systems
Chapter 1: Equipment in Mud Circulating Systems
Chapter 2: Mud Hydraulics Fundamentals
Chapter 3: Mud Pumps
Chapter 4: Mud Hydraulics Optimization

Part Two: Gas Drilling Systems
Chapter 5: Equipment in Gas Drilling Systems
Chapter 6: Gas Compressors
Chapter 7: Gas Drilling Operations

Part Three: Underbalanced Drilling Systems
Chapter 8: Equipment in Underbalanced Drilling Systems
Chapter 9: Gas and Liquid Injection Rates
Chapter 10: Underbalanced Drilling Operations