دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a pump barrel used for either tubing pumps or rod (insert) pumps. A fullcylinder barrel consists of a steel jacket inside of which is a full-length tube of cast iron or special alloy. The inner surface of the barrel is polished to a mirror like finish to permit a fluid-tight seal between it and the plunger. In a sectional liner barrel, the tube placed inside the steel jacket consists of a series of sections placed end to end and held firmly in place by means of threaded collars on the ends of the steel jacket.