双弯与三弯钻具对单弯钻具的等效问题
苏义脑, 唐雪平, 高兰
Problem of double and triple bent PDM equivalent to single bent PDM
SU Yi-nao, TANG Xue-ping
石油学报 . 2002, (2): 77 -81 .  DOI: 10.7623/syxb200202017