Special test pipe nipple for annulus test mine entrance

The utility model relates to a special test pipe nipple for an annulus test mine entrance, which is used for connecting the test port of an oil field mine entrance and a test gate. The utility model is characterized in that screw threads are formed on the outer wall of an upper joint, a pressing screw cap is arranged on the screw threads, a gasket is arranged at the upper end of the pressing screw cap, an annular bulge is formed on the outer wall of the other end of the upper joint, a movable connecting hoop is sheathed on the annular bulge of the upper joint, a sealing groove is formed on the end of the upper joint, a sealing ring is arranged in the sealing groove, external screw threads are formed on the upper end of a lower joint, the upper end of the lower joint and the lower end of the upper joint are connected through a movable connecting hoop, screw threads are formed on the outer wall of the lower joint, a pressing screw cap is arranged on the screw threads, and a gasket is arranged at the lower end o