New Downhole Intelligent Throttling System Based on the Poppet Valve

A new downhole intelligent throttling system has been designed to adapt to the variable downhole environment for natural gas exploitation. The downhole intelligent throttling system consists of the throttling structure and the automatic control system. The throttling structure refers to the poppet valve and the existing downhole throttling valve. Its throttling principle is based on the theory that the changing flow area affects the pressure. The automatic control system consists of the downhole motor, downhole sensors, data transmission channel and the Industrial Personal Computer (IPC). Temperature and pressure are monitored by the downhole sensors. These data are transmitted to the IPC to process through the data transmission channel. The IPC sends signals to control the downhole motor to adjust the throttling structure in real time. The downhole flow field has been simulated by using the ANSYS analysis software. The results include the gas pressure, velocity and temperature. They s how that the throttling structure can get the required smaller and more stable outlet pressure at the different inlet pressure. It is a feasible fundamental part to establish the whole downhole intelligent throttling system.