Non-pump-stopping device for sand washing

The top end of an oil pipe reversing body is used for being connected with an oil pipe cock, the bottom end of the oil pipe reversing body is connected to a lower connector, external threads are arranged on the outer wall of the middle of the oil pipe reversing body, and an overflow hole is formed in the lower portion of the oil pipe reversing body; the first sealing ring and the second sealing ring are connected to the lower portion of the oil pipe reversing body in a sleeving mode at intervals, and the overflow hole is located between the first sealing ring and the second sealing ring. The locking ring is movably connected to the external thread in the middle of the oil pipe reversing body and tightly attached to the top of the sliding sealing sleeve. The sliding sealing sleeve is sleeved on the overflow hole in a sliding manner; the casing tee joint is sleeved on the oil pipe reversing body; the lower sealing sleeve is installed at the bottom end of the casing tee joint and used for being connected with a