No Go : A profile ring in the tubing with a very small opening that allows flow but stops any equipment or tool from passing through the restriction. May be small I.D. or pinned
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}