The integrated process of electric pump injection and production can effectively shorten the operation time and reduce the operation cost. However, under the condition that the gas processor cannot be used, the gas contained in the produced well fluid can easily cause the electric pump gas lock and affect the operation time rate. This paper introduces the small diameter high temperature exhaust valve. Under the environment of normal temperature and high temperature of 180°C, the opening pressure and closing pressure are stable. The exhaust valve body and hydraulic control pipeline have good sealing performance under the environment of 180°C and 21 MPa. The field test shows that the exhaust valve is in the pump. Under the condition of hanging depth of 950 m and well temperature of 145 °C, the exhaust valve opens and closes flexibly, and the maximum exhaust volume reaches 1000 m3/d, and the application effect is good.