What is the function of folding choke manifold?

1. By implementing well-killing operations through the throttling effect of the throttle valve, the flow of fluid in the well is controlled, and the wellhead backpressure (vertical pressure and casing pressure) is controlled to maintain the bottom hole pressure ≥ the formation pressure, and to prevent overflow.

2. By the pressure relief effect of the throttle valve, the wellhead pressure is reduced, achieving a "soft shut-in" vertical cushion.

3. Through the extensive relief effect of the blowout valve, the overflow material is led out of the well site to prevent fire and personnel poisoning, ensuring drilling safety.