Modeling the design and performance of progressing cavity pump using 3-D vector approach

Progressing Cavity Pumps (PCP), a type of Moineau pumps, is an artificial lift method often used for high viscosity and solids producing wells. In this paper, the three-dimensional vector theory and the theory of Hypocycloid were used to give a new modeling insight into the design and performance of PCPs. Specifically, a new design model and procedure of PCPs was developed and described in detail, in addition to a new mathematical model to determine the theoretical pump factor for any given PCP. A Sensitivity analysis was carried out to study the effects of the pump eccentricity, semicircle diameter and motor rotational speed on the pump performance. The results of this study are not only important for manufacturers to optimize PCP׳s design, but also for operators to improve the performance and efficiency of such PCPs.