دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: see pipe dolly.

n: A small handcart used to carry the casings to the drill platform

n: any device equipped with rollers and used to move drill pipe or collars. It is usually placed under one end of the pipe while the pipe is being lifted from the other end by an air hoist line.