It is a supporting device of the hydraulic blowout preventer and the main equipment for controlling the pressure of blowouts and oil and gas Wells.

The well flushing operation is carried out through the throttling effect of the throttle valve to replace the contaminated mud in the well. At the same time, the pressure of the casing at the wellhead and the riser is controlled to restore the pressure control of the mud liquid column on the bottom of the well and stop the overflow.

Through the pressure relief effect of the throttle valve, the wellhead pressure is reduced to achieve "soft well closure".

Through the large-scale discharge effect of the blowout valve, the pressure of the wellhead casing is reduced to protect the wellhead blowout preventer assembly.

It is equipped with a hydraulic control box and can be remotely controlled.

Working pressure: 2000PSI to 20,000 psi

Nominal diameter: 2.1/16" to 4.1/16" (46mm to 103mm)

Working medium: Petroleum, natural gas, slurry

Operating temperature: -46°C to 121°C (LU class)