Gas lift plunger drainage gas recovery performance evaluation device

The invention discloses a gas lift plunger drainage gas production performance evaluation device which comprises an organic glass oil pipe, an L-shaped frame and an oil pipe supporting frame, a first L-shaped frame fixed pulley and a second L-shaped frame fixed pulley are arranged at the top of the L-shaped frame, and steel wire ropes are arranged on the surfaces of the first L-shaped frame fixed pulley and the second L-shaped frame fixed pulley. One end of the steel wire rope is connected with the shaft end of an external motor, and the other end is connected with a lifting hook. The organic glass oil pipe and the oil pipe supporting frame are fixed, then an external motor is started, the oil pipe supporting frame moves upwards, and a pulley at the front end of the oil pipe supporting frame and a pulley at the bottom of the oil pipe supporting frame move on an L-shaped frame sliding rail on the surface of an L-shaped frame; therefore, the oil pipe can move at an angle of 0-90 degrees, and tests on the up-dow