Christmas Tree 06 : Term applied to the valves and fittings assembled at the top of a completed well to control the flow of hydrocarbons and other fluids. (RP 54)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}