دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a sub part of which is formed in the shape of a horseshoe and used to orient the drill stem downhole.

n: the guide shoe on the lower end of a survey tool: it locates into the key-way of the orienting sub.the survey tool can then be properly aligned with the bent sub.

a bias cut across the pipe or tool body on the end to aid in entering restricted openings.