Christmas tree is a wellhead device used to exploit oil, such as flowing well and mechanical recovery well. It is the main equipment for controlling and regulating oil and gas production at the top of oil and gas well, and mainly consists of casing head, tubing head and Christmas tree body.
The Christmas tree has the following functions:
(1) Connect all layers of casing underground, seal the annular space of all layers of casing, and bear the weight of casing.
(2) Hang tubing and running tools to support the weight of all tubing strings in the well and seal the annular space between tubing and casing.
(3) control and regulate the production of oil wells.
(4) Ensure the construction of various underground operations, and facilitate the construction of measures such as well killing operation and tripping operation, as well as daily production management such as pressure measurement and wax removal.
(5) Collect data of oil pressure and casing pressure.
Christmas tree is also called Christmas tree. A wellhead control device for testing oil and gas after completion of oil (gas) wells, or for oil production such as flowing wells and mechanical production wells. It consists of tubing hanger, many gates, tees or four-way, and is directly installed on the casing head. A single-wing Christmas tree with only one oil outlet pipe is called a single-wing Christmas tree; Two-wing Christmas tree with oil pipes on both sides. The Christmas tree is equipped with choke (choke), and the oil and gas production can be controlled by replacing choke with different inner diameters.
Attached picture (you can find the meaning of the pipeline by yourself):