Advances allow drillers to reach further

摘要

The effect of pipe rotation on velocity profile and pressure drop is calculated in concentric and eccentric annulus, during the axial flow of non-Newtonian fluid. The calculations are applied to the design of hole-cleaning during drilling and cementing. The calculations are validated by comparison with measured values. In the absence of reliable calculations, one can only guess the impact of pipe rotation on hole-cleaning. This work gives an engineer the tool to design for improved hole-cleaning and hence help save time and money during well construction and production.