Valve system for measuring downhole multiphase fluid flow

A valve system for measuring downhole multiphase fluid flow comprises a valve seat, a valve element, a first pressure sensor, a second pressure sensor, a third pressure sensor, a fourth pressure sensor and a calculation assembly. The calculation assembly is used for calculating the flow rate of the fluid injected from the inlet or the outlet after the sampling tank is filled with the fluid and the inlet and the outlet are communicated by the communication tank. The flow of the fluid output from the outlet is calculated according to the pressure measured by the first pressure sensor, the second pressure sensor, the third pressure sensor and the fourth pressure sensor, the height difference of the positions of the third pressure sensor and the fourth pressure sensor and the cross sectional area of the outlet. The valve system can measure the flow of multiphase fluid. 一种用于测量井下多相流体流量的阀门系统，其包括：阀座、阀芯、第一压力传感器、第二压力传感器、第三压力传感器、第四压力传感器和计算组件，其中，所述计算组件用于在所述取样槽收集满从所述入口或所述出口注入的流体且所述连通槽将所述入口和所述出口相接通后，根据所述第一压力传感器、所述第二压力传感器、所