With the increasing energy consumption and environmental problems, the development of new renewable energy is becoming more and more important. Geothermal energy as a clean, renewable energy, its application prospects. The key to the development and utilization of geothermal energy is the construction of geothermal wells, and the quality and performance of geothermal well casing, as an important part of geothermal wells, directly affect the stable operation and development effect of geothermal wells. This paper will discuss the development trend of geothermal well casing.

1. Development Status of Geothermal Well Casing

At present, the geothermal well casing is mainly made of steel pipe and glass steel pipe. Steel pipe has the advantages of high strength and corrosion resistance, but it also has the disadvantages of heavy weight, easy corrosion, and difficult processing. The glass steel pipe has the advantages of light weight, high strength, corrosion resistance, etc., but the price is higher, and it is prone to thermal expansion problems, which is not suitable for deep wells. In addition, the size and thickness of geothermal well casing also have certain limitations, and the difference of geothermal resources in different regions also has a certain impact on its application.

2. Development trend of geothermal well casing

1.Optimize Materials

In view of the existing problems of geothermal well casing, optimizing the material is one of the keys to solve the problem. At present, many new materials have been introduced into the manufacture of geothermal well casing, such as titanium alloy, aluminum alloy, high strength polymer and so on. These materials have the advantages of high strength, light weight, corrosion resistance, etc., which can effectively solve the problems existing in the existing casing, while reducing the cost and improving the service life.

2.Strengthen design

The design of geothermal well casing is also one of the keys. According to the characteristics of geothermal resources and well depth in different areas, the reasonable design of the size and thickness of geothermal well casing can improve its service life and stability. At the same time, the use of optimized wellbore structure can reduce the temperature and pressure of the wellbore and reduce the thermal expansion of the casing.

4.Promotion of new technologies

The manufacturing and construction technology of geothermal well casing is also constantly promoting new technologies. For example, advanced manufacturing technologies such3DPrinting, material synthesis, etc. can produce high-quality sleeves that meet individual needs, while also reducing costs. In terms of construction technology, the use of advanced wellbore pipe reinforcement technology and self-digging well technology can reduce the difficulty and cost of the project and improve the efficiency and quality of construction.

3. Conclusion

The development trend of geothermal well casing is multifaceted, including optimizing materials, strengthening design, promoting new technologies, improving intelligence and promoting international cooperation. These trends will help to solve the existing problems of geothermal well casing, improve its service life and stability, but also help to promote the use and promotion of geothermal energy, to achieve the goal of sustainable energy. With the continuous innovation and improvement of technology, it is believed that the future development of geothermal well casing will be more extensive.