Oil casing is a type of petroleum drilling and production equipment, which is a deep mechanical processing product with high requirements and large usage in petroleum drilling and production engineering. According to statistical data in China, for every 1m of drilling, approximately 62kg of oil well tubing is required, including 48kg of casing, 10kg of tubing, 3kg of drill pipe, and 0.5kg of drill collar. Casing and tubing are the products with the highest consumption in the oil drilling and production process.

In 2013, the petroleum drilling and production equipment manufacturing industry achieved a main business revenue of 245.334 billion yuan, a year-on-year increase of 14.5%, and a total profit of 17.169 billion yuan, a year-on-year increase of 26.3%. The industry prosperity has always been at a high level. At present, the market share of Chinese oil drilling and production equipment manufacturers worldwide has exceeded 30%.

The development trend of oil casing is generally similar to that of the petroleum drilling and production equipment manufacturing industry. In recent years, the demand for oil casing has been continuously increasing, and the production has also increased. Not only has the dependence on imports been overcome, but a large number of exports have also been achieved. At present, the export volume of oil casing in China is equivalent to about 30% of the total sales volume. It is expected that in the future, with the progress of production technology, China's oil casing will further enter the world.