دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a length of pipe whose bottom edge is serrated or dressed with a hard cutting material and that is run into the wellbore around the outside of stuck casing, pipe, or tubing to mill away the obstruction. Also called a bum shoe. See washover pipe.

n: the cutting shoe fitted to the lower end of washover pipe and dressed with hard-surfaced teeth or tungsten carbide.