دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: see two-step grooving system.

n: a reciprocal pumping unit in which one or more power cylinders are placed over the wellhead and a counterbalance system using compressed air or gas is provided. On the upstroke, high-pressure gas is applied to the underside of the pistons of the inside power cylinders, and low-pressure gas above the pistons is exhausted to the sales line. On the downstroke, high-pressure gas is applied to the top of the pistons, and the low-pressure gas below the pistons is exhausted to the sales line.

n: a pattern of drum spooling in which the wire rope is controlled by grooves to move parallel to drum flanges for half the circumference (180) and then crosses over to start the next wrap. Also called counterbalance system.

n: A kind of way that groove banding steel wire rope.