Velocity Stack : A long tube used in well fire fighting operations to move all the fluids and the fire up above the damaged wellhead. May also be used to put out the fire in some cases
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}