دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a crescent-shaped sand dune with a convex face upwind and a concave face downwind.

n: the valve through which oil and water are discharged from separators. treaters. and so on. It is usually a motor valve. but may be a liquid-level controller as well. dunefield n: an accumulation of windbome sand on that part of the seashore that lies above storm-flood level.

n: the window slide valve installed on the top of the screwdrill
which closes when trun on the pump and open when stop the pump

a deposit of sand produced by wind or running water. The dune may be massive, but usually lower energy and permeability varies.