String mechanical model for complex-structure wells and dynamic 3D digital shaft
Yang Yong, Shao Bing, Wang Fengrui, Ni Yuanyong, Tian Wei, Cui Shuqing, Yang Yihan, Yan Xiangzhen
Acta Petrolei Sinica . 2015, (3): 385 -394 .  DOI: 10.7623/syxb201503015