Throw-in-type drill pipe drift and using method thereof

The invention provides a throw-in-type drill pipe drift and a using method thereof, and belongs to the field of oil exploration. The throw-in-type drill pipe drift comprises a pipe body, a sliding sleeve, a guiding head and a supporting structure which are arranged coaxially; the upper end of the guiding head is connected with the lower end of the pipe body; the sliding sleeve is mounted on the pipe body and can slide up and down along the pipe body; pipe body limiting holes are formed in the pipe body; a sliding sleeve limiting hole is formed in the sliding sleeve; one end of the supporting structure is connected with the lower end of the sliding sleeve, and the other end of the supporting structure is connected with the end face of the upper end of the guiding head; and when the slidingsleeve slides downwards along the pipe body, the supporting structure is stretched to be opened, and when the sliding sleeve slides upwards along the pipe body, the supporting structure is closed. According to the throw-in-ty