دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a large valve, usually installed above the ram preventers, that forms a seal in the annular space between the pipe and the wellbore or, if no pipe is present, in the wellbore itself. Compare ram blowout preventet:

n: See annular blowout preventer.

a device installed above or below the BOP that is capable of sealing around any device, and even on itself if the wellbore is empty.

n: a kind of preventer with two multi-effect blowout preventer
,and the bottom of the upper one is inserted in the top of the lower one so as to decrease the depth of thid equipment and improve the link intensity between them

n: a new kinds of annular blowout preventer.

n: a blowout preventer that uses rams to seal off pressure on a hole that is with or without pipe. Also called a ram preventer. Compare annular blowout preventer.