This paper examines a nonlinear dynamics model to explore the significant factors
influencing the coupled torsional-axial vibrations of a drill string. The primary focus lies in …

This paper discusses grasping and orientation control of an object by dual one-link
Timoshenko arms. The control objective is to control the grasping force and the orientation of …

Purpose Drill string is the core component in drilling engineering, and studying drill string
vibration is significant to reduce drilling costs and increase drilling efficiency. Methods The …

Les différents types de vibrations des garnitures de forage jouent un rôle important dans le
dysfonctionnement des opérations de forage car celles-ci conduisent à la rupture …

Stuck release operation is one of the largest contributions for the increase of non-productive
time and consequently the increase of the well cost. Traditional stuck release operations …

This article proposes a novel methodology to solve an existing gap in benchmark definition
by the adoption of statistically defined benchmarks as references to test products or …

This paper presents a nonlinear control scheme to stabilize the problem of torsional
vibration suppression with boundary impulsive conditions. A new nonlinear dynamical …

The paper considers oilwell drilling operations and, in particular, the problem of minimizing
drilling vibrations. We develop a stabilizing controller for a one dimension wave PDE with …

The effects of bolter arm on the roadheader stability are studied. According to the
mechanical structure of the bolter arm, a vibration model is established, and the model is …

When the anchor rig is working, the anchor arm is in a heavy-duty working environment and
is more susceptible to damage. The effects of bolter arm on the jumbolter stability are …