Blowout prevention tool in double-valve-plate oil pipe

The utility model relates to the technical field of underground operation, in particular to a double-valve-plate oil pipe inner blowout prevention tool which comprises an upper connector, a lower connector, a valve seat assembly, an upper valve plate, a lower valve plate, an upper reset piece and a lower reset piece. A valve seat assembly is arranged in the upper connector corresponding to the position between the lower side of the limiting ring table and the upper end of the lower connector and sequentially comprises an upper valve ring, a left half cylinder, a lower valve ring and a right half cylinder from top to bottom, the left half cylinder is fixedly installed on the lower side of the left portion of the upper valve ring, and the right half cylinder is fixedly installed on the lower side of the right portion of the lower valve ring. The utility model has reasonable and compact structure, is convenient to use, and can effectively vacate the opening space of the upper valve plate and the lower valve plat