Fundamentals of Horizontal Wellbore Cleanout SONG, XIANZHI (PROFESSOR OF COLLEGE OF PETROLEUM ENGINEERING. DEPUTY DIRECTOR OF STATE KEY LABORATORY OF PETROLEUM RESOURCES AND PROSPECTING, AND THE EXECUTIVE DEAN OF COLLEGE OF CARBON-NEUTRAL ENERGY, CHINA UNIVERSITY OF PETROLEUM (BEIJING).),LI, GENSHENG (ACADEMICIAN OF CHINESE MEMBER OF ENGINEERING; VICE-PRESIDENT OF CHINA UNIVERSITY OF PETROLEUM, BEIJING (CUPB), CHINA; DIRECTOR OF STATE KEY LABORATORY OF PETROLEUM RESOURCES AND PROSPECTING),XU, ZHENGMING (ASSOCIATE PROFESSOR, DEPARTMENT OF PETROLEUM ENGINEERING, CHINA UNIVERSITY OF GEOSCIENCES, BEIJING, CHINA),SHAH, SUBHASH (PROFESSOR EMERITUS, MEWBOURNE SCHOOL OF PETROLEUM AND GEOLOGICAL ENGINEERING, UNIVERSITY OF OKLAHOMA, USA)