دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: old-style tap with longitudinal grooves across the threads. See tap, taper tap.

n: A usual fishing tool for fishing tubular goods dropping in the wellbore. There are thread and coning in the inner surface.

another name for a tapered tap. Used to screw into boxed of connections.