دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

v: see reverse circulation.

n: See cross-over circulation.

n: anyone of two types of thread that are cut on casing as standardised by API. The other is the short thread. long way n: displacing fluid from the tubing up the annulus. Compare short way.

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.

n: the displacing of wellbore fluids from the annulus up the tubing. Compare long way.