Oil layer anti-blocking tubular column

The utility model discloses an anti-blocking tubular column for an oil layer. The nozzle comprises a central pipe and a nozzle main body, the top of the central pipe is connected with the bottom of the oil pipe; the nozzle body is connected to the bottom of the center pipe. The central pipe is sleeved with an overflowing pipe capable of moving up and down; the outer wall of the overflowing pipe isprovided with a spring piece of which the middle part is in a convex bending state; the outer wall of the spring piece abuts against the inner wall of the oil well casing pipe. The inner wall of thelower portion of the overflowing pipe is attached to the outer wall of the central pipe, a liquid containing cavity is further formed between the inner wall of the overflowing pipe and the outer wallof the central pipe, a flow blocking structure is arranged in the central pipe, a liquid inlet and a liquid outlet are correspondingly formed in the side walls of the central pipe above and below theflow blocking structure, and