Downhole throttling gas well shaft simulation experiment apparatus

The invention provides a downhole throttling gas well shaft simulation experiment apparatus comprising a water tank, a water inlet pipeline, a gas inlet pipeline, a pipe end joint, a shaft, a bend pipe and a discharge pipeline. One end of the water inlet pipeline communicates with the water tank, both the water inlet pipeline and the gas inlet pipeline are connected with the lower portion of the pipe end joint, the upper portion of the pipe end joint is connected with the shaft, the shaft is connected with the discharge pipeline through the bend pipe, the water inlet pipeline is provided with a metering pump and a flow sensor A, the gas inlet pipeline is provided with a flow sensor B and an gas inlet pressure sensor, the joint between the pipe end joint and the shaft is provided with a pressure sensor A and a temperature sensor B, the inner of the lower end of the shaft is provided with a restrictor, a pressure sensor B and a temperature A are disposed over the restrictor, a plurality of pressure sensors C are disposed over the pressure sensor B at intervals, and the tail end of the discharge pipeline is provided with a counterbalance valve. The downhole throttling gas well shaft simulation experiment apparatus can measure changes of parameters such as the temperature and the pressure of a fluid before and after throttling, so the apparatus can simulate and measure the real conditions in a downhole throttling gas well in a better way.