Obstructive manifold

阻流管匯the role of
A. By using the throttling effect of the throttle valve to carry out well killing operations, the contaminated mud in the well is replaced while controlling the wellhead casing pressure and riser pressure, restoring the pressure control of the mud column on the bottom of the well, and preventing overflow.
B. By using a throttle valve to relieve pressure, the wellhead pressure is reduced, achieving a "soft shut in".
C. By utilizing the massive release function of the blowout valve, the overflow material is directed out of the well site, reducing the pressure of the wellhead casing, preventing fires and personnel poisoning at the well site, protecting the wellhead blowout preventer group, and ensuring drilling safety.

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