Negative-pressure salty mud fishing device for salt mining well

The utility model relates to the technical field of salt cavern gas storages, in particular to a negative-pressure salty mud fishing device for a salt mining well. The negative-pressure salty mud fishing device for the salt mining well comprises a main pipe section, a plugging pipe section and an upper pipe section which are sequentially connected in series from bottom to top, the lower end of the main pipe section is provided with a one-way flow limiting structure for preventing fluid from flowing out of a port of the main pipe section, and a blind plugging plate is arranged in the plugging pipe section. A punching mechanism used for damaging and penetrating through the blind blocking plate is arranged in the upper pipe section. The salty mud fishing device has the advantages of being simple and reasonable in structural design, capable of achieving the purpose of fishing salty mud in the salt cavern and simple and convenient in fishing process. 本实用新型涉及盐穴储气库技术领域，特别涉及一种采盐井负压捞盐泥装置。本实用新型的采盐井负压捞盐泥装置包括自下而上依次串联的主管段