... geometry (pipe diameter, roughness and inclination angle), and fluid flow (flow pattern, superficial liquid and gas velocities, liquid holdup, water cut). The effect of each parameter on the critical particle transport velocity is analyzed to find the most important ones. The evaluations are validated...

... and the roughness of the tubing string on the wear of the rod guides. This paper presents the conducted case study and the major findings. The gained knowledge is the basis for the development of a detailed wear prediction tool to properly estimate the lifetime of the rod guides under realistic conditions...