دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a device made up on an overshot to lengthen it so that it can pass over the damaged top of a fish and securely engage an undamaged area of the fish. See overshot. External line-up clamps are usually used on pipe with a diameter of 8 inches (20 centimetres) or less. Compare internal lineup clamp.

n: the added nipple between the body of bell socket and the top joint

n: The basement that be added under the original basement,which can increase the effective
height below the support ridgepole of rotary table .