Optimal design of sucker-rod pump system

In view of the low efficiency of the sucker-rod pumping system,a new optimal design method taking the economic index as an optimal object is given to ensure the sucker-rod pump system to work harmoniously.Firstly the error limit of single-well calculation using the selected model is established.Secondly aimed oil production is given to get FB-HP by Inflow Performance Relationship curve.Then pressure distribution for the annulus is calculated to establish the depth of production fluid level and the pump setting depth is obtained.Composite rod string is designed.The performance parameters and dynamometer card are calculated.At last,the balance of pumping unit is adjusted according to the design system.The application result in the First Production Plant of Xinjiang Oilfield shows that the efficiency of mechanical oil recovery system using the new design method is raised by 14.7%.The electric energy consumption of the optimally designed wells is reduced,and great economic benefit is achieved.