Universal three-type under-pressure operation device for rods and pipes in oil field

The invention discloses a universal three-type under-pressure operation device for oil field rods and pipes. The problems that the construction cost is high and the whole-process under-pressure operation cannot be realized during the under-pressure operation of three types of wells of an existing oil field are mainly solved. The bottom of the traveling slip (1) is connected with the upper blowout preventer (2), the bottom of the upper blowout preventer (2) is connected with the telescopic working barrel (4), the bottom of the telescopic working barrel (4) is connected with the balance pressure relief device (8), the bottom of the balance pressure relief device (8) is connected with the lower blowout preventer (12), the bottom of the lower blowout preventer (12) is connected with the fixed bearing base (9), and the bottom of the fixed bearing base (9) is connected with the three-ram blowout preventer (11). The device can realize operation under pressure in the whole process, meets the requirement of environmen