Well tubing pump back throwing type valve

The utility model relates to a back throwing type valve of a tubing pump used in an oil well of oil field. The utility model is characterized in that the upper end of a short tubular valve body 5 is provided with a circular limiting seat 3, and an annular groove is formed on the inner tube wall of the upper part of the valve body 5 below the circular limiting seat. An armillary snap ring 4 is installed in the groove. The utility model has the characteristics of simple structure, reliable work, convenient operation, etc. The utility model can be widely used in various operations of an oil well with a tubing pump. After the utility model is applied, the utility model can utilize the same oil pipe post to conduct liquid or pressure below an outer working barrel of a tubing pump before a piston is descended. The relevant operational time is obviously shortened, and the operational efficiency is improved.