流量控制阀数值模拟及其在FDT的应用

The Simulation of Flow Control Valve and Its Application in Formation Dynamics Tester

流量控制模块是模块式地层测试器的重要组成部分,对于大体积预测试、流量控制、压力控制具有重要作用。该模块的核心部件为流量控制阀,通过对3种不同节流口受力情况、流量特性等进行比较,选择了轴向三角槽式节流口。通过压力模拟曲线、多级传动的形式建立模型对流量控制阀的流量稳定性进行了模拟,对误差进行了分析,改进了原方案,合理地控制了误差。该模拟对下一步的具体设计提供了参考。

Flow control module is one of the most important parts of the FDT（Formation Dynamics Tester）.It is useful for large volume pre-test,flow speed control and pressure control.The key part of the flow control module is the flow control valve.In this article,axial triangular groove is selected through comparing the force and the flow character of three orifices.With the pressure simulating,multi-stage transmission,a simulation of flow stability is performed.The solution for the error in the simulation is suggested.The simulation is very useful for the design of the module.