Perforating Gun 3 : A carrier for shaped charge explosives that punches holes through the casing and cement and into the formation. Guns may be run on wireline or tubing
George E. King Engineering, 5000 Oilfield Terms: A Glossary of Petroleum Engineering Terms, Abbreviations and Acronyms, US 2010. http://gekengineering.com/Downloads/Free_Downloads /Glossary_of_Petroleum_Engineering_Terms_25_August _2010.pdf, (Oil - Amer) {593}