1. Tubing Cross and Tree
The tubing four-way and three-way of the Christmas tree are connected with the main valve, wax removal valve and wing valve. The common four-way and three-way are flanged and flange-studded. The Christmas tree with four links is a double-wing Christmas tree, and the Christmas tree with three links is a single-wing Christmas tree. On some platforms, the three-way Christmas tree is composed of a wax removal valve and a main valve or a wellhead safety valve, which becomes an integral Christmas tree.
2. Gate Valve and Plug Valve
The gate valve is a valve in which the moving direction of the closing part (gate) is perpendicular to the flow direction. A plug valve is a valve that shuts off the rotation of a component (cock), and the plug can be cylindrical, conical or spherical. Play the role of wellhead control.
3. Grease Nipple
The nozzle is a component used to control the flow of the oil well on the Christmas tree. It is installed between the wing valve and the oil outlet pipeline. The nozzle can also be used to control the gas injection volume of gas lift wells and the water injection volume of water injection wells. The nozzle is a throttling element. The reasonable production pressure difference of the oil well can be controlled by changing nozzles with different hole diameters. The nozzle is made of high-carbon alloy steel after heat treatment. There are many kinds of hole diameter from 2-20mm, each difference of 0.5mm is a grade.
There are two types of nozzles: fixed and adjustable. The fixed nozzle is equipped with replaceable parts. This part has a fixed hole for throttling. The adjustable nozzle has a small hole of variable area controlled by the outside and a corresponding small hole area indicating mechanism. The orifice of the oil nozzle is a small hole distributed on the tubular part, and the change in the number of the small holes covered by the outer sleeve of the tubular part is the change in the flow area.
4. Check valve
A check valve is a valve that only allows fluid to flow freely in one direction, so it is also called a check valve. The check valve has a mechanism that automatically prevents fluid from flowing in other directions. The check valve on the Christmas tree is generally installed between the wing valve and the nozzle. There is no check valve installed on the Christmas tree in some oil wells, but a check valve is generally installed on the Christmas tree in the water injection well. The check valve has oil outlet pipe type, swing open type, rising rod type and butterfly type. The check valve can be fully open or reduced in diameter, and its end connections are commonly flanged and clamped.
5. Flange
The flange is a flange with bolt holes and is used to connect the end connection of the sealing structure of the pressure equipment. Flanges that comply with API specifications are API flanges. Blind flanges do not have a central through hole and are used to completely close the flange end face or outlet connection. The blind flange and the outlet flange to be closed should have the same pressure level and be equipped with the same sealing elements.
According to different connection methods, flanges can be divided into threaded flanges and welded neck flanges. One side of the threaded flange is the sealing surface, and the other side is the internal thread. One side of the welding neck flange is the sealing surface, and the other side is the welding groove.
6. Gasket Ring
The gasket ring is a sealing element for flange connection. Commonly used API steel rings are R type, RX type and BX type. R type and RX type steel ring can be used interchangeably in 6B type flange. BX type steel ring can only be used for 6BX type flange. RX type and BX type steel ring have pressure self-tightening performance, but they are not interchangeable.
The surface roughness of all 23° of R type and RX type steel ring shall not be lower than 63RMS, and all 23° of BX type steel ring
The surface roughness should not be lower than 32RMS. Type RX and BX steel rings have a pressure through hole, drilled through the entire height of the steel ring.
7.Bolts and Nuts
Bolts and nuts are components used to connect flanges and clamps. The threads of bolts and nuts shall comply with API Std 5B.
8. Back Pressure Valve (Back Pressure Valve)
The back pressure valve is installed in the tubing hanger. When removing the blowout preventer or installing and disassembling the Christmas tree, a back pressure valve is required to seal the inner hole of the tubing; when the lower main valve is repaired and replaced, back pressure is also required The valve seals the inner hole of the oil pipe. There are generally two types of back pressure valves, one is fixed by threads, and the other is fixed by an expansion locking mechanism.
9. Christmas Tree Cap
The Christmas tree cap is installed on the wax removal valve on the top of the Christmas tree, and is used to provide a quick vertical entrance into the tubing space. If you want to perform wire rope operations, coiled tubing operations, production testing, switch sliding sleeves, loading and unloading back pressure valves, etc., you must first remove the Christmas tree cap.
10. Christmas Tree Valve
The main valve controls the main passage of oil and air flow into the Christmas tree.
The production gate controls the flow of oil to the oil outlet pipeline.
The wax removal gate can be connected to the wax removal blowout prevention pipe.The choke controls the output of the spouting well.Small cross, connecting parts.
The Christmas Tree holds a unique and significant position as both the most beautiful and essential component in wellhead equipment, playing a crucial role in oil and gas extraction. At Vigor, we recognize its importance and have dedicated considerable time and effort to the production and quality control of Christmas Trees. Our QC team member, Shane, meticulously oversees, manages, and documents the entire product testing and inspection process to ensure compliance with API standards. His dedication has been pivotal in securing customer approval for our products.
We are grateful for the hard work and dedication of every team member, as well as the trust our customers place in us. Together, we aim for continuous improvement and success, ensuring that each Christmas Tree we produce meets the highest standards of quality and performance.
For more information, you can write to our mailbox info@vigorpetroleum.com & marketing@vigordrilling.com
