Well control equipment
When a person faces the derrick gate, the right wing of the wellhead four-way is installed with a throttling manifold, and the left wing is installed with a well pressure manifold.
1, through the throttling effect of the throttle valve to implement the well pressure operation, control the flow of fluids out of the wellhead, control the wellhead back pressure (vertical pressure and casing pressure), to maintain the bottomhole pressure ≥ formation pressure and keep it unchanged, and to stop the overflow.
2、Through the pressure relief effect of the throttle valve, reduce the wellhead pressure and realize "soft shutdown".
3、Through the large amount of relief effect of the blowout valve, the overflow will be led out of the wellsite, preventing the wellsite from catching fire and poisoning the personnel, and ensuring the drilling safety.