دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: see fill-up line.

n: the smaller of the side fittings on a bell nipple, used to fill the hole when drill pipe is being removed from the well.

n: The line through which fluid is added to the annulus to maintain the fluid level in the well bore during the extraction of the drilling assembly.