Choke manifold is the supporting device of hydraulic BOP, which is the main equipment to control blowout and pressure of oil and gas well. Through the choking effect of choke valve, the well killing operation is carried out to replace the contaminated mud in the well. Meanwhile, the wellhead casing pressure and riser pressure are controlled to restore the pressure control of mud liquid column on the bottom of the well and prevent overflow. Through the pressure relief function of choke valve, the wellhead pressure can be reduced and "soft shut-in" can be achieved. The wellhead casing pressure can be reduced and the wellhead blowout preventer group can be protected through a large amount of relief effect of blowout valve.

- Main components: choke valve, gate valve, pipeline, pipe fittings, pressure gauge, etc;

- Three kinds of choke valves: manually adjustable, fixed and hydraulic;

- Two kinds of gate valves: manual or hydraulic;

- Can be equipped with hydraulic control box to realize remote control.

Choke manifold is the necessary equipment to control well kick and implement pressure control technology of oil and gas wells. When the BOP is closed, the choke valve is used to control the casing pressure to maintain the bottom hole pressure slightly greater than the formation pressure to prevent further formation fluid flow into the well. In addition, choke manifold can be used for pressure relief and soft shut-in. When the pressure in the well rises to a certain limit, it is used to for blowout protection.

When the well pressure increases, the pressure in the casing can be controlled by releasing the fluid in the well through the opening and closing of the choke valve on the choke manifold (manual adjustable, hydraulic and fixed). When the pressure inside the casing exceeds a certain pressure difference, it can be directly discharged through the gate valve.