Estimation of BOP Stack Drag and Added Mass Using Computational Fluid Dynamics

摘要

The hydrodynamic drag and added mass of a blowout preventer (BOP stack) influences the resonant amplitudes and frequencies of a drilling riser system during connected (low amplitude oscillations) and disconnected (high amplitude oscillation) conditions. The prediction of hydrodynamic loads on a BOP stack at resonant frequencies is of importance for analyzing wellhead and casing fatigue and ensuring well integrity. Accurate prediction of dynamic hook load fluctuation is also of significant importance, particularly in determining feasibility for deploying and hanging-off drilling riser systems in ultra-deep water.