Down-hole tubular string buckling is the most classic and complex part of tubular string
mechanics in well engineering. Studies of down-hole tubular string buckling not only have …

Research on down-hole tubular mechanics has been more than 70 years so far. Many
breakthrough research results have been obtained, and they have been successfully …

关于井下管柱力学的研究迄今已有七十多年的历程, 取得了许多重要的研究成果,
并主要在油气井工程中获应用实效. 然而, 由于井眼约束和作业工况的复杂性 …

This paper presents development of a novel control scheme for suppressing stick–slip
oscillations of drill-strings. This scheme utilises a Modified Integral Resonant Control (MIRC) …

Understanding the buckling behaviors of rods confined in a finite space is of paramount
importance in a diversity of engineering fields. In this paper, theoretical analyses, numerical …

Helical buckling is very common in slender structures and it is characterized by the
development of helical deformation patterns along their length. This phenomenon is …

Buckling of rods with cylindrical constraints is an essential problem in engineering and
medical fields. Completely different to the buckling of classical Euler rods, the post-buckling …

Previous theoretical formulations for helical buckling of drill strings vary significantly and are
mostly proposed for the linear questions. But there are a little no-linear questions in the …

Mechanical behavior of oilwell drillstring coming at the motions of penetrating rock is
associated with drilling safety and wellbore quality. A poor performance can be attended by …

Understanding the buckling and post-buckling behavior of rods confined in a finite space is
of both scientific and engineering significance. Under uniaxial compression, an initially …