Drop-in reversal double layer fracturing nozzle assembly

The utility model discloses an inputting type of double-deck fracturing nozzle assembly, which can be flowed back, and relates to a device used for a sand blower. In oil fields, in the fracturing process of oil gas wells, prior type of sand blower can implement the fracturing double-deck construction of immobile strings, but cannot flow back after fracturing. The utility model comprises a nozzle (1), an intermediate (2) and a bottom plugging body (3), the intermediate comprising a connecting head (2-1) and a joint (2-2), the bottom plugging body comprising a connecting sleeve (3-1), a bottom plugging (3-2) and a valve ball (3-3). The connecting head (2-2) on one end of the intermediate (2) is connected with the nozzle (1) through a sheer pin (4) and the joint (2-2) on the other end of the intermediate (2) is connected with the connecting sleeve (3-1) of the bottom plugging body (3) through a lock ball (5), a lock block (6) and a spring (7). The nozzle assembly is launched from the well mouth and divided into three sections on the well bottom, blocking the lower sand blower and providing an outlet for the upper sand blower. The nozzle assembly adopts the design of single-flow valve, forms the passage for the upper and lower layers to flow back at the same time and is capable of flowing back after fracturing.