Oil removing and blowout preventing tool for sucker rod

An oil removing and blowout preventing tool for a sucker rod comprises a twin-wire plug (1), a blowout preventing pressure cap (2), a self-sealing core (4), a housing (5), a high-pressure shutoff valve (7), a high-pressure tee (8) and a hose (9), wherein external threads are arranged at the upper and the lower ends of the high-pressure tee (8), and the other end of the high-pressure tee (8) is sequentially connected with the high-pressure shutoff valve (7) and the hose (9); the upper end of the high-pressure tee (8) is in threaded connection with the lower end of the housing (5); the self-sealing core (4) is mounted in the housing (5); an inner thread is arranged at the upper part of the housing (5); internal and external threads are arranged at the upper and the lower parts of the cone frustum-shaped hollow blowout preventing pressure cap (2); the lower part of the pressure cap (2) is in threaded connection with the housing (5); and the upper part of the pressure cap (2) is in threaded connection with the mi