智能完井用井下液控多级流量控制阀研究

Downhole Hydraulic Operated Multistage Flow Control Valve for Intelligent Well Completion System

井下流量控制阀是智能井实现智能开采的核心工具,在介绍液控光纤监测型智能完井系统IC-Riped所使用的井下液控多级流量控制阀结构和工作原理基础上,对控制阀在3 000 m长6.35 mm液控管线驱动下的操控及运动进行了分析,包括控制阀运行压力、进油流量、回油流量和动作时间等参数的变化。通过试验数据和理论推导分析了管线压力损失Δp的影响因素,结果表明液压油在管线中的流动可近似为层流,得到Δp与进油流量Q的定量关系,两者近似呈线性关系。这些数据和分析为实现控制阀井下精确控制提供了扎实的试验和理论支撑,并为完井井下流量控制系统的优化提供了依据。

Downhole flow control valve is the core tool of intelligent well to realize intelligent production. The structure and working principle of downhole hydraulic operated multistage flow control valve applied in hydraulic- control fiber-monitor intelligent completion system IC-Riped has been introduced. The control and movement of the valve driven by the 06. 35 mm hydraulic control line of 3 000 m has been analyzed, including the change of the control valve operating pressure, in flow rate,return flow rate and operating time. The influence factors of pipeline pressure loss Ap has been analyzed based on experimental data and theoretical calculation. The results show that the hydraulic oil flow in the pipeline can be approximated as laminar flow. The quantitative relationship between Ap and inlet flow Q is approximately linear. These data and analysis offer solid experimental and theoretical support for the precise control of the control valve, and provide the basis for the optimization of the downhole inflow control system.