The set of valves, spools and fittings connected to the top of a well to direct and control the flow of formation fluids from the well.

  The valves and fittings installed at the top of a gas or oil well to control and direct the flow of well fluids.

n. A kind of RS-232 line tester or breakout box featuring rows of blinking red and green LEDs suggestive of Christmas lights.

To dream of a Christmas tree, denotes joyful occasions and auspicious fortune. To see one dismantled, foretells some painful incident will follow occasions of festivity.   

The assembly of fittings and valves on the top of the casing which control the production rate of oil.

The assembly of fittings and valves on the top of the casing which control the production rate of oil.

The pole of lights that starts a drag race, named for its red and green lights. Most drag races use the pro or heads up start which has three lights in between the first (red) and last (green) stage. Choptop

The pole of lights that starts a drag race, named for its red and green lights. Most drag races use the pro or heads up start which has three lights in between the first (red) and last (green) stage.

A series of lights used at the star of a drag race.

A series of lights used at the start of a drag race.

Also called the Tree, it is the noticeable electronic starting device between the lanes on the starting line. It displays a calibrated-light countdown for each driver.

The Tree, as it often is called, is the noticeable electronic starting device between lanes on the starting line. It displays a calibrated-light countdown for each driver.

An assembly of lights oriented in two vertical columns. Used near the starting line of drag racing and CO2

Directive to briefly turn on exterior lights to enable visual acquisition.

Directive to briefly turn on exterior lights to enable visual acquisition.

The assembly of valves, pipes and fittings used to control the flow of oil and gas from the casinghead.

The assembly of fittings and valves on the top of the casing which control the production rate of oil.   

The arrangement of pipes and valves at the wellhead which controls the flow of oil and gas and prevents blowouts.

The complete assembly of valves connected to the wellhead of a development well. These are used to control the flow of hydrocarbons from the well and provide access to the well bore and annulus. In ad [..]

an assembly of valves, spools, pressure gauges and chokes fitted to the wellhead of a completed well to control production. Christmas trees are available in a wide range of sizes and configurations, s [..]

  (1) An assembly of valves mounted on the casinghead through which a well is produced. The Christmas tree also contains valves for testing the well and for shutting it in if necessary. (2) A subsea p [..]

The system of pipes, valves, gauges and related equipment that is located on the well at ground level and that controls the flow of gas and other petroleum products produced from the well.

The valve assembly at the top of tubing strings and casing in a natural gas well (or a free-flowing crude oil well) that provides primary pressure reduction, production rate control and shut-in capabi [..]

an arrangement of pipes and valves fitted to a production wellhead to control the flow of oil or gas and prevent a possible blowout.

The arrangement of pipes and valves at the wellhead to control the flow of oil or natural gas and to prevent blowouts.

The system of pipes, valves, gauges and related equipment that is located on the well at ground level and that controls the flow of gas and other petroleum products produced from the well.

The assembly of valves, pipes, and fittings used to control the flow of oil and gas from a well.

An assembly of valves, gauges, and chokes mounted on a well casinghead to control production and the flow of oil to the pipelines.

A complex assemblage of valves, controls, fittings, gauges, and pipe connections at the top of the casing of an oil or gas well. The Christmas tree controls the flow of oil and gas from the well. The silhouette of the apparatus can vaguely resemble a decorated Christmas tree, hence the moniker.

The assembly of control valves, pressure gauges, and chokes at the top of a well to control the flow of oil and gas after the well has been drilled and completed.

The assembly of fittings and valves which control the pressure and flow of a well.

This is any time that the core sector list is split 50/50 with half of the sectors in the red (negative on day) and half in the green (positive on day). Usually signals “sit on hands” approach.