Tubing 3 : In petroleum production this is the tubular product used to bring the product to the surface. API sixes range from 1.050 inch OD to 4.5 inch OD inclusive. (RP 5A5)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}