دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. a device that is inserted into a pipeline for the purpose of cleaning;a line scraper. Also called a pig. 2. a device that is lowered into the borehole of a well for various purposes such as enclosing surveying instruments, detonating instruments, and the like. v: to drop or pump a device down the borehole, usually through drill pipe or tubing.

n: a device that is dropped down a borehole,usually through the drill pipe or tubing.