Fully predictive accurate pressure profiling methods along general well paths will be developed by solving rigorous mathematical models that do not bear the limitations of ad hoc assumptions implicit in mean hydraulic radius, slot flow, multiphase empirical correlation and like approaches. The project objective is to bring state-of-the art models that exceed commercial capabilities and their newer counterparts to Managed Pressure Drilling planning to provide an integrated software platform for the entire circulation system that will set new industry standards.