Christmas trees are wellhead devices used to extract oil from blowout wells and mechanical production wells. It is the main equipment for controlling and regulating oil and gas production at the top of oil and gas wells. The Christmas tree is composed of valves, reducers, nozzles and pipe fittings. It is used to control production and repair steel wires, cables, coiled tubing, etc. A device that provides conditions for well operations.
The role of Christmas tree
(1) Connect each layer of casing downhole, seal the annular space of each layer of casing, and bear part of the weight of the casing.
(2) Suspending tubing and downhole tools, supporting the weight of all tubing strings in the well, and sealing the annular space between tubing and casing.
(3) Control and regulate the production of oil wells.
(4) Ensure the construction of various underground operations, facilitate the construction of well killing operations, starting operations and other measures, and carry out daily production management such as pressure measurement and wax removal.
(5) Record oil pressure and casing pressure data.
Christmas tree classification
According to the structure of the Christmas tree, it can be divided into two types: split type and integral type. Split type is assembled by some independent parts such as valves.
The integral type is to make the main valve, safety valve, wax removal valve and wing valve into an integral part. The distance between the valve and the valve is small, which saves space and is resistant to high pressure. It is especially suitable for oil and gas wells on offshore platforms.
According to the types of production wells and well completion production methods, they can be divided into self-blowing wells, electric submersible pump wells, gas lift wells, screw pump wells, water injection wells, and Christmas trees for gas wells.
Single tube and double tube
1. Single Tubing Christmas Tree
The single-tubing Christmas tree is installed on the wellhead of a single-tubing completion. In addition to the split type and the integral type, it also has a single wing and a double wing. Depending on the type of well or the production method of the well, valves and pup joints can be combined into different forms of single tubing Christmas tree, and the connection method can be flange type, thread type or clamp type.
2.Double tubing Christmas tree
The double-tubing Christmas tree is installed on the wellhead of the double-tubing completion, and is used for the production control of the simultaneous and independent exploitation of two oil layers. The dual tubing completion is to run two parallel tubing strings (long tubing string and short tubing string) or two concentric tubing strings in the same production casing, and pair the two tubing strings through a dual-tube packer and a single-tube packer. Separate oil (or gas) intervals.
3. Three-tube Christmas tree
With the development of technology and actual application requirements on site, three-tube Christmas trees have appeared.
At Vigor, we understand that the casing head is an indispensable component in the oil and gas extraction process. Our dedicated team adheres to stringent quality control measures throughout the entire production cycle-from manufacturing and testing to inspection and final packaging and transportation. We believe that meticulous attention to each step is essential to delivering the best possible product.
Thanks to our relentless efforts, every product manufactured by Vigor consistently meets 100% of our clients' requirements. We are committed to maintaining comprehensive quality control to ensure the utmost respect for our products and accountability to our customers. The Vigor team firmly believes that this unwavering dedication is crucial to providing our clients with the highest quality products and services. By upholding these standards, we aim to contribute significantly to the success of the oil and gas industry.
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