Modeling of drill string dynamics in directional wells for real-time simulation

Simple and computationally efficient drill string models running real-time describing motion in all axes directional wells are important for the implementation of closed-loop control assisted monitoring during drilling operations. This paper proposes a new simplified three-dimensional model based on parametric curve lumped-parameter modeling, where Kane’s method is used to establish equations motion. Validation steady-state convergence lumped vertical horizontal alignment was compared with finite-element model. The configuration restoring forces show good results analysis. Hence, demonstrate axial contraction as function body being oriented inertial frame, inherently producing nonlinear coupled tension forces. qualitative response confirmed simulation case studies, showcased by deviated J-well configuration. Traveling block velocity top drive torque included actuated inputs analyze off-bottom friction contact along wellbore. proposed act virtual sensor wells.