دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. a tool placed on a drill collar near the bit that is used, depending on where it is placed, either to maintain a particular hole angle or to change the angle by control- ling the location of the contact point between the hole and the collars. See packR:d-hole as- sembly. 2. a vessel in which hydrocarbon vapors are separated from liquids. 3. a fractionation system that reduces the vapor pressure so that the resulting liquid is less volatile.

n: A downhole tool which has minor interspace with borehole,usually be fixed on the drill string.