Paper Title
Optimization of New Generation Long Stroke Pumping Unit using Numerical Simulation

Abstract
Long stroke pumping system for sucker rod pumping reduces energy costs and improves performance over time particularly for highly deviated, high liquid volume and gaseous wells. In order to achieve these goals, the entire 3D model of pumping tower assembly is numerically simulated using commercially available Finite Element Analysis (FEA) software. Based on the FEA results an optimization of the pumping unit is performed on critical components. This work focuses on systematic FEA based approach to design and re-design so that compact, stronger and cost-effective unit can be evolved. Non-linear structural analysis is carried out to get detailed stress and deformation patterns in top sprocket assembly, tower structural elements. Obtained results illustrated that the evolved design doesn’t need major modifications and breakdown time can be minimized. An attempthas been made to optimize standard design by changing the mounting plates for optimum bearing load and bolt pretension, the location of the top sprocket supports or piling locations are also optimized for improved stress distribution. Simulation results are compared with field data and it shows that there has been increase of bolt replacement time span and lateral deformation of optimized unit is reduced than standard design. Keywords - Long stroke Pumping unit. Top Sprocket, Piling Location, Non-linear FEA, Deformation, Stress