دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the ratio between the hydraulic pressure required to open the preventer and the well pressure under the preventers packing device or ram.

n: the contrast that the pressure in hole with operation pressure of openning wick of blowout preventer when shut in.

the ratio of the pressure required to open the preventer to the pressure under the rams.