CITIC Pacific Special Steel uses the bloom continuous casting and rolling process to produce AISI4145H drill collar steel and SAE4137 drill pipe joint steel in accordance with API SPEC7 in the United States, which have been widely used in major oil fields in China and exported to North America. Due to its high purity, uniform composition and performance, the steel has received unanimous praise from oil field users. The main customers are: Daqing Oilfield, Grant, Smith, Baker Hughes, Heyuan Alloy, Huadelys, Shanxi Fenglei, Shuguang Huayang, and other enterprises.