The chock manifold  is by the throttle valve, gate valve, pipe, pipe fittings and pressure gauge. The chock manifold is to command the well kick, control the pressure of oil and gas Well. Under the condition of BOP closed, using the chock valve  to ensure the certain casing pressure to maintain that the bottom hole pressure always slightly greater than the formation pressure to avoid further formation fluid into the well. In addition, when implementing shut-in, using the chock manifold to achieve soft shut-in. When the pressure in well is rising, using  the chock valve to release the pressure. The chock valve is devided into three types: manual adjustable, hydraulic type and fixed type. When the borehole pressure rises to a certain limit, we can use chock manifold to open flow to protect the well.

Basic：

Working Pressure：3000Psi～20000Psi

Nominal Size：2 1/16"～4 1/16"

Tem. Grade：KU (-60 ℃~121 ℃)

Working Medium: oil, gas, mud, H2S, CO2