Pig 07 : A device inserted in a pipeline for the purpose of sweeping the line clean of water rust, or other foreign matter. Also known as GO-DEVIL. (ITOGP)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}