Recently, the rare earth high-strength, high-toughness ultra-deep well petroleum casing pipe independently developed by the Steel Pipe Branch of Bao Gang United Steel was successfully run in an 8,000-meter ultra-deep well for the first time. This achievement marks a major breakthrough for Bao Gang United Steel's steel pipe products in the field of ultra-deep well steel pipe supply, and is another vivid reflection of the Steel Pipe Branch's adherence to independent innovation and overcoming technical challenges.

Ultra-deep well exploration and development impose stringent requirements on steel pipe performance, necessitating simultaneous satisfaction of ultra-high yield strength, tensile strength, low-temperature impact toughness at 0°C, as well as mechanical properties such as high internal pressure resistance, external collapse resistance, and torsion resistance. Facing these technical challenges, Bao Gang United Steel leveraged its unique advantage in rare earth steel, deepened its R&D in steel pipes, overcame the bottleneck of balancing strength and toughness in high-grade casing, and successfully developed the rare earth high-strength, high-toughness ultra-deep well casing. Compared to traditional casing, this product demonstrates significantly improved compression and deformation resistance, making it suitable for complex oil and gas well environments. Previously, the product underwent multiple rounds of laboratory simulations and field tests, confirming its ability to