Table of Contents

1. Theoretical Basis of Rotating Jets
2. Drag Coefficient and Settling Velocity of Sand in Cleanout Fluids
3. Sand Transport Efficiency during Horizontal Well Drilling
4. Sliding Friction between Coiled Tubing and Sand Bed in Cleanout Operations
5. Numerical Study of Helical Flow Field in Horizontal Annulus
6. Movement Behaviors of Sand in Annular Helical Flow Field
7. Hydraulic Parameter Calculation of Annular Helical Flow
8. Field Application
9. New Method of Horizontal Wellbore Cleanout by Supercritical Carbon Dioxide
10. Hole Cleaning with Jets and other Emerging Technologies

About the Author

Dr. Xianzhi Song is the Professor of College of Petroleum Engineering and the Vice Dean of College of Artificial Intelligence, China University of Petroleum at Beijing (CUPB). He is also the Vice Director of CUPB Geothermal Research Center, and the Director of CNPC Key Laboratory of Drilling Engineering, etc. He has obtained the National Natural Science Funds for Excellent Young Scholars of China, the Awards of Science and Technology for the Excellent Youth by Sun Yue-Qi Foundation, and National Excellent Doctoral Dissertation. His research areas involve drilling and completion, geothermal exploitation, and artificial intelligence. He has authored more than 50 papers and earned 20 patents. He received his B.S degree in petroleum engineering from China University of Petroleum at East China and PHD degree in oil and gas well drilling engineering of CUPB in 2010. Dr. Gensheng Li is the Academician of Chinese Member of Engineering and the Vice-President of China University of Petroleum at Beijing (CUPB). He has over 30 years of experience concentrating on the research and application of water jet technology in drilling and well completion. His research interests include water jet assisted drilling within HPHT Wells, abrasive jet perforation and multistage fracturing, and unconventional oil & gas well drilling & completion. He received the National Award for Technological Invention in 2012 and National Award for Science and Technology Progress in 2007 as a principle investigator. Dr. Zhengming Xu is a lecturer in the Department of Petroleum Engineering at the China University of Geosciences at Beijing (CUGB). His research interests include gas kick simulation, wellbore multiphase flow, cuttings transport, and particle settling. Xu holds a PhD degree in oil & gas well engineering from the China University of Petroleum, Beijing. He is a member of SPE. Dr. Subhash Shah is Emeritus professor at the University of Oklahoma and the fellow of American Institute of Chemical Engineers (AIChE). He has been working on petroleum industry for over 40 years and specialist on well completion, hydraulic fracturing, and coiled tubing flow. Dr. Shah has authored or coauthored more than 300 technical papers in 30 international journals. He holds a bachelor's degree from the University of Baroda, India, and master’s and PhD degrees from the University of New Mexico, all in chemical engineering. Shah is a Lifetime Member of SPE, a 2012-2013 SPE Distinguished Lecturer, and the recipient of the 2009 SPE Mid-Continent Region Completions Optimization and Technology Award.