دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. the depression in a sheave (pulley) into which wire rope seats as the wire rope moves over the sheave. 2. on a draw- works drum, one of several depressions on the surface of the drum around which the wire rope drilling line is wrapped. The grooves keep the wire rope from wrapping unevenly across the drum.