دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

v/n: 1. The intentional pumping of wellbore fluids down the annulus and back up through the drillpipe. This is the opposite of the normal direction of fluid circulation in a wellbore. Since the inside volume of the drillpipe is considerably less than the volum

circulating down the annulus and up the tubing.