دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. an excess of draft at the stem of a ship or drill ship, as compared to the bow.2.friction between a moving device (such as a bit) and another moving or nonmoving part (such as the formation). 3. the bending of rock strata adjacent to a fault.

n: The extra force required to move the drill string owing to the drill strings being in contact with the wall of the borehole.