دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: See cross-over circulation.

n: the course of drilling fluid downward through the annulus and upward dlrough the drill stem, in contrast to normal circulation in which the course is downward through the drill stem and upward through the annulus. Seldom used in open hole, but frequently used in workover operations. Also refers to as circulating the short way," since returns from bottom can be obtained more quickly than in normal circulation. Compare normal circulation.