At present, most of the simulated wells can only serve as observation effects and can not meet the requirements of third-level well control exercises. In this paper, considering the common well injection time is short, it is impossible to achieve continuous well injection, the mixing of gas and drilling fluid is uneven, and the blowout effect is not ideal, a special well head device  for simulated well is designed, and water injection is used to simulate the well blowout scene. The application results show that the simulated well can achieve continuous well blowout and has good effect.