IMPROVING THE RATE WHILE DRILLING DEEP，OR ULTRA DEEP WELL IN THE COMPLEX GEOLOGICAL STRUCTURE OF EAST SICHUAN
QI Lin AN Xian-bina HUANG Zhi-qiangb FAN Yong-taob
西南石油大学学报(自然科学版) . 2009, (3): 142 -145 .  DOI: 10.3863/j.issn.1674-5086.2009.03.033