Comment on 'A simple and accurate numeric solution procedure for nonlinear buckling model of drill string with frictional effect' by Sun Youhong, Yu Yongping, Liu Baochang [J. Petrol. Sci. Eng. 128 (2015)44-52]

摘要

Fig. 1 in this paper by Sun Youhong, Yu Yongping, Liu Baochang [J. Petrol. Sci. Eng. 128(2015)44-52] is not correct. This paper's title refers to nonlinear buckling while its content is linear, and it ignores numerous relevant references. (C) 2016 Elsevier B.V. All rights reserved.