新型电液复合智能完井系统主要涉及井下流量控制技术、多参数检测技术等。基于机械结构设计原理，开展电液复合智能完井流量控制阀核心元器件节流阀套的结构设计，并利用有限元分析法，对节流阀套的力学性能及流体流动特性进行数值模拟仿真研究，分析不同开度、不同含水率、不同排量、不同工况下节流阀套的流场特性。结果表明：井筒温压工况对节流阀套流量调控性能的影响微小，在高温高压（125 ℃、50 MPa）条件下性能稳定，满足设计要求。在不同开度下，随着流量的增大压差逐渐增大。在流量一定时，随着开度的增大压差逐渐减小。当流量与开度一定时，压差随含水率的升高而增大；当流量与含水率一定时，节流阀套的调控级数越大产生的压差越小。研究成果可为电液复合智能完井流量控制阀的结构设计提供一定的理论指导。

The novel electro-hydraulic composite intelligent completion system primarily involves downhole flow control technology and multi-parameter detection technology and so on. Based on the principles of mechanical structure design, the structural design of the core component of the electro-hydraulic composite intelligent completion flow control valve was conducted, namely the throttle valve sleeve. Finite element analysis was utilized to numerically simulate and study the mechanical performance and fluid flow characteristics of the throttle valve sleeve. The the flow field characteristics under various openings, water cut rates, displacements, and working conditions were analyzed by this method. The results indicate that the downhole temperature and pressure conditions have little effect on the flow control performance of the throttle valve sleeve. The performance is stable and meets the design requirements under high temperature and high pressure (125 ℃, 50 MPa). With different openings, the pressure difference gradually increases as the flow rate increases. At a constant flow rate, the pressure difference decreases with the increase of the opening. When the flow rate and opening are constant, the pressure difference gets greater when water cut becomes larger. When the flow rate and water content are constant, the greater the control series of the throttle valve sleeve, the smaller the pressure difference. The research results can provide theoretical guidance for the structural design of intelligent completion flow control valve.