首页|Stability analysis of pressure and penetration rate in rotary drilling system
Stability analysis of pressure and penetration rate in rotary drilling system
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NSTL
The purpose of this paper is to stabilize the annular pressure profile throughout the wellbore continuously while drilling. A new nonlinear dynamical system is developed and a controller is designed to stabilize the annular pressure and achieve asymptotic tracking by applying feedback control of the main pumps. Hence, the paper studies the control design for the well known Managed Pressure Drilling system (MPD). MPD provides a closed-loop drilling process in which pore pressure, formation fracture pressure, and bottom-hole pressure are balanced and managed at the surface. Although, responses must provide a solution for critical downhole pressures to preserve drilling efficiency and safety. Our MPD scheme is elaborated in reference to a nontrivial back-stepping control procedure and the effectiveness of the proposed control laws are shown by simulations.
NSTL
