Quick-action pressure-testing joint of internal jet-preventing tool

The utility model relates to a quick pressure testing joint for inner blowout prevention tools. The utility model is used for connecting a pressure testing pump and a pressure testing object when the pressure of various inner blowout prevention tools is tested in the well drilling industry. The utility model comprises an adapter, a union, a conversion pipe nipple and a sealing ring, wherein the adapter is connected with the conversion pipe nipple through the union; the end part of the conversion pipe nipple is provided with the sealing ring; the buckle types of the union, the conversion pipe nipple and the adapter are all standard buckle types. Hence, when the pressure of inner blowout prevention tools with different buckle types, sizes and pressure resistant levels is tested, the purpose of the connection of the pressure testing pump and the pressure testing object can be conveniently achieved through the replacement of the union and the adapter.