Process method and device for layer-sealing channeling-sealing of high temperature and high pressure leaking well

The invention provides a process method and device for layer-sealing channeling-sealing of a high temperature and high pressure leaking well. The process method for layer-sealing channeling-sealing ofthe high temperature and high pressure leaking well comprises the steps that the high temperature and high pressure leaking well is filled with quartz sand, and a new shaft bottom is formed at the upper boundary of the quartz sand; first cooling liquid is injected into the high temperature and high pressure leaking well; a ground pipeline is connected, and an oil pipe and a casing pipe are subjected to pressure tests through the ground pipeline; when the temperature of the newly formed shaft bottom falls to a first preset temperature, the oil pipe and the casing pipe are subjected to the pressure tests to predetermined pressure values while no puncture occurs, and a high temperature pre-sealing agent is injected into the high temperature and high pressure leaking well through the oil pipe; second cooling liquid i