1. Application of welding technology in oil and gas storage and transportation

After the effective development of petroleum resources, appropriate storage and transportation means are needed to make them more fully and efficiently utilized. In the process of oil and gas storage and transportation nearby, the application of welding technology plays a very important role, mainly in the following two aspects:

Application of 1. welding technology in oil and gas storage tanks

After petroleum gas, liquid and liquefied gas are mined and processed, they need to be put into oil and gas storage tanks, which is also convenient for transportation and use. Due to the different objective requirements of oil and gas in different applications and different types of oil and gas storage tanks, welding technology is one of the most important technologies in the manufacturing process of oil and gas storage tanks. In the manufacturing process of oil and gas storage tanks, gas-electric vertical welding, covered electrode arc welding, flux-cored automatic welding and submerged arc welding are mainly used. Generally speaking, if a relatively large floating storage tank needs to be built at the top, it is generally manufactured by advanced automatic welding technology.

2. Application of welding technology in oil and gas pipeline

Compared with oil and gas storage tanks, oil and gas pipelines have the advantages of more convenience, stronger safety, lower cost and higher utilization rate, and are more suitable for the transportation of oil and natural gas. It is precisely because of these advantages that oil and gas pipelines all over the world are growing geometrically every year. In the process of oil and gas pipeline construction, covered electrode downward welding methods such as cellulose, low hydrogen and flux-cored wire are mainly adopted. Among them, low hydrogen covered electrode downward welding technology can be used in relatively harsh manufacturing environment, and flux-cored wire is a semi-automatic welding technology with a large number of people, which has been vigorously promoted in China in recent years.

Second, the application of welding technology in oil drilling and production machinery

Application of 1. welding technology in oil field oil pump

At present, there are two kinds of pumps used in oil field exploitation in China, one is the surface oil pump used to transport oil, oil and gas, liquefied gas and other fluid resources, and the other is the oil pump used to exploit oil resources. Accordingly, there are two main welding methods for oil field production pumps, one is the welding technology used in the production process of production pumps, and the other is the welding technology to repair the pump body when the production pumps are damaged or leaked. The main welding methods are surfacing, covered electrode arc welding, diffusion welding and friction welding. In addition, with the continuous improvement of oil recovery technology, some new welding technologies and processes are gradually applied to oil recovery pumps to ensure higher benefits of oil development.

2. Application of welding technology in oil production drill pipe

The development and exploitation of oil fields can not be separated from the drilling of oil and gas wells, and the oil drill pipe is the most important part of drilling tools. In the process of using oil drill pipe, it is necessary to connect drill pipe tools with welded pipes, which is related to the efficiency and quality of oil exploitation. Arc welding and flash butt welding are the earliest welding technologies used for oil production drill pipes, but with the continuous development of science and technology, advanced continuous drive or inertia friction welding is also used for oil production drill pipes. The quality of weld depends on the welding production efficiency between drill pipe tool and welded pipe body. At present, inertia friction welding technology is the most widely used in the welding of oil production drill pipes in China.

3. Application of welding technology in petroleum drill bit

In the process of oil exploitation, we will encounter many special situations and need special methods to deal with them. In oil exploitation, hard rocks often hinder the best exploitation path, so it is necessary to use an oil drill to break the rocks. The quality of rock fragmentation will also have a great impact on the quality of drilling, the efficiency of oil exploitation and the cost of developing drilling. As far as the types of oil production bits are concerned, they can be divided into two categories: roller bits and PDC bits. Welding technology is mainly used for the repair and processing of drill bits, and different welding processes are needed according to different drill bit materials.

Three. conclusion

At present, China's petroleum industry is developing steadily with the growth of industrial demand. The increasingly harsh mining environment and higher mining demand have greatly improved the welding technology used in petroleum engineering construction, which requires the welding technology to adapt to the changing welding environment. Therefore, welding technology is another important development direction of petroleum engineering construction in China in the future, which can ensure the steady development of petroleum engineering construction in China.

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