دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the ratio between the pressure in the hole and the operating-piston pressure needed to close the rams of a blowout preventer.

n: The ratio between subsurface pressure and working hydraulic pressure which closing BOP rams requires.

the ratio between the pressure in the hole and the operating-piston pressure needed to close the rams on a given BOP design against a particular well head pressure.