دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a special steel pumping rod. Several rods screwed together make up the mechanical link from the beam pumping unit on the surface to the sucker rod pump at the bottom of a well. Sucker rods are threaded on each end and manufactured to dimension standards and metal specifications set by the petroleum industry. Lengths are 25 or 30 feet (7.6 or 9.1 metres);diameter varies from 0.5 to 1.5 inches (12 to 30 millimetres). There is also a continuous sucker rod (trade name: CorodTM).

a string or solid or hollow tubular that is moved by a pump jack at the surface to operate a rod pump at the bottom of the well.