Abstract Accurate pressure drop estimation is important for drill string and bit nozzles design optimized fluid circulations as well identifying the drilling problems such nozzle(s) washout or plugging. In this study, Bingham Plastic model has been modified by applying a coefficient to its turbulent loss calculations. This encompasses effects of pipe tool joints other in losses. The range was d...

C E 860 Advanced Fluid Mechanics 3(3,0) Laminar and turbulent flows; boundary layer and free shear flows (jets, wakes, etc.); descriptions of velocity, shear stress and pressure measurements, and aerodynamic drag. C E 861 Mechanics of Sediment Transport 3(3,0) Characterization of sediments; physical principles governing fluvial, estuarial, and coastal transport of cohesionless and cohesive sedi...