Christmas tree wellhead device

Abstract

The invention provides a Christmas tree wellhead device. The device comprises a pressure reducing tank, five pressure reducing tank oil outlets are formed in an upper end plate of the pressure reducing tank and correspondingly connected with five six-way oil inlets in a six-way joint through five flow dividing pipes, six-way oil outlets in the six-way joint are connected to connecting pipes used for being connected with a Christmas tree, and an oil inlet is formed in a lower end plate of the pressure reducing tank; and a filtering device and a buffering protruding head are arranged in the pressure reducing box, the filtering device divides the inner space of the pressure reducing box into an upper space and a lower space, the buffering protruding head is fixed in the pressure reducing box, and the protruding portion of the buffering protruding head is located over the oil inlet. According to the Christmas tree wellhead device, high-pressure fluid can be borne, a buffering protruding head module in the pressure reducing box can reduce impact abrasion of the high-speed fluid to the wellhead device, the flow dividing pipes can divide the high-speed fluid, the flow speed of the fluid is reduced, and then the fluid enters the upper end of the Christmas tree, so that the safety of the Christmas tree wellhead device is effectively guaranteed.

Description

technical field [0001] The invention relates to a Christmas tree, in particular to a wellhead device of a Christmas tree. Background technique [0002] During oil field operation, the device located at the oil production wellhead and above the ground is the oil production wellhead device. Most of the existing wellhead devices include related accessories such as Christmas tree, tubing head and tubing hanger. The production wellhead has many functions, such as hanging the tubing to support the weight of all the tubing strings in the well; sealing the annular space between the tubing and casing; controlling and regulating the production of the oil well, etc. Therefore, as the key equipment for oil field production, the performance of the wellhead device is directly related to whether the oil and gas well can be safely and efficiently produced and operated. In this regard, a large number of improvements and research and development have been carried out for oil (gas) wellhead de...

AI Technical Summary

Problems solved by technology

[0004] 1. Oil production wellheads are usually operated at high pressure. Traditional devices have a single structure, weak ultra-high pressure resistance, and extremely short service life. Often, new devices need to be replaced in less than a year, causing great waste, and the shutdown during replacement is harmful to production. impact and require a lot of manpower;

[0005] 2. When the oil is extracted from the wellhead, there will be a lot of impurities, such as soil, sand, etc., which will not only affect the output of the oil field, but also cause wear and blockage of the oil production wellhead equipment for a long time;

[0006] 3. In the oil field, the height and volume of the ground part of the wellhead of the Christmas tree are often very large. In addition, the wellhead needs to withstand the high-pressure vibration brought by the operation, and the workers need to climb when performing maintenance or operation. The lack of auxiliary support structures is not conducive to The safety and stability of the overall structure;

[0007] 4. The tubing head body at the wellhead of the Christmas tree is easy to leak. Most of the existing tubing hanger sealing structures use a set of sealing rings, which have poor sealing effect. Once leakage occurs, the consequences will be disastrous

[0008] The above problems have affected the safety, stability and production efficiency of the Christmas tree wellhead device. To solve the above problems, it is necessary to design a new multi-functional Christmas tree wellhead device

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