Gaining insight into possible vibratory responses of dynamical systems around their stable equilibria is an essential step, which must be taken before design and application. The results such a study can significantly help prevent instability in closed-loop stabilized by avoiding the excitation system neighborhood its resonance. This paper investigates nonlinear oscillations rotary inverted pen...

optimization of drilling fluid parameters such as mud weight, salt concentration, and temperature is essential to alleviate instability problems during drilling through shale sections. the selection of suitable mud parameters can benefit from analyses that consider significant instability processes involved in shale-drilling–fluid interactions. this paper describes the development of analytical...