Well-pipe unfreezing device for ravelly ground

The utility model discloses a stuck releasing device for unconsolidated deposit well pipe, which consists of a hollow cylindrical impact bar and a cylindrical cuff fixedly connected with the middle part of the impact bar. The axle wire of the cuff is parallel with that of the impact bar, and the longitudinal section of the cuff is a ladder type; an inclined wedge surface which has a 10 to 15 degrees included angle with the axle wire of the impact bar is formed at the lower part of the impact bar, a duckbill hole is formed at the bottom part of the impact bar, and a plurality of spout holes which are towards one side of the cuff are arranged at the middle part of the impact bar. The high-pressure water sprayed from the duckbill hole at the bottom part of the impact bar can ensure the stuck materials on the outer wall of the well pipe to be returned to the ground surface, different included angles are formed between the axes of the spout holes which are towards one side of the cuff at the middle part of the imp