Definition(s)
Christmas tree
An assembly of valves, fittings, chokes, and gauges used in monitoring and controlling producing, injection, and inactive wells. The Christmas tree is assembled at the top of the well starting with the uppermost flange of the tubing head.
Source: API BULLETIN E3, Environmental Guidance Document: Well Abandonment and Inactive Well Practices for U.S. Exploration and Production Operations, First Edition, January 1993 (Reaffirmed June 2000). Global Standards
Christmas tree
The valves and fittings assembled at the top of a completed well to control the flow of hydrocarbons and other fluids.
Source: API RP 54, Recommended Practice for Occupational Safety for Oil and Gas Well Drilling and Servicing Operations, Third Edition, August 1999 (2007). Global Standards
Christmas tree
The valves and fittings assembled at the top of a completed well to control the flow of hydrocarbons and other fluids. See API Spec 6A.
Source: API RP 74, Recommended Practice for Occupational Safety for Onshore Oil and Gas Production Operation, First Edition, October 2001 (March 2007). Global Standards
Christmas tree
Assembly of equipment, including tubing-head adapters, valves, tees, crosses, top connectors and chokes attached to the uppermost connection of the tubing head, used to control well production.
Source: API SPEC 6A, Specification for Wellhead and Christmas Tree Equipment, Twentieth Edition, October 2010 (Addendum November 2012). Global Standards
Christmas tree
The collection of fittings and valves, on the top of the casing, controlling the hydrocarbon production rate.
Source: IADC UBO / MPD Glossary, December 2011. Global Standards
Christmas tree
“Christmas tree” means the valves and fittings assembled at the top of a completed well to control the flow of hydrocarbons and other fluids.
[Mich. Admin. Code R 408 (2013)].
Source: Oil and Gas Drilling and Servicing Operations, Michigan Administrative Code R 408, February 8, 2013. Regulations