Well sealing device and method for pressure-bearing precipitation well

The invention discloses a well sealing device and method for a pressure-bearing precipitation well, and the device comprises a bottom plate which is provided with a bottom plate tongue-and-groove and a fan-shaped waterproof steel plate; the dewatering well casing is provided with a well sealing steel plate, and the side wall is provided with a water stop ring wing; the well shut-in device outer pipe is arranged in the dewatering well pipe in a sleeving manner; the well shut-in device inner pipe is sleeved in the well shut-in device outer pipe, and the lower end of the well shut-in device inner pipe is provided with an inner pipe drainage hole and is limited and fixed through an inner pipe limiting steel plate; the inner pipe water stop strip clamping groove is formed between the well plugging device outer pipe and the well plugging device inner pipe and is provided with an inner pipe water stop strip; the bottom plate steel plate is arranged at the lower end of the sealing device outer pipe and provided with