Sou Hu Cai Jing·2026-01-23 21:12Group 1 - Company Ansteel Co., Ltd. has recently obtained a patent for a low-cost J55 grade oil casing, with the patent application number CN202511387178.0 and authorization date set for January 9, 2026 [1] - The patent involves a seamless pipe manufacturing technology, specifically focusing on a low-cost J55 grade oil casing with specific chemical compositions, including C: 0.28%-0.32%, Si: 0.15%-0.25%, Mn: 0.8%-1.0%, P≤0.02%, S≤0.01%, Ti: 0.01%-0.02%, Al: 0.015%-0.025%, with the remainder being Fe and unavoidable impurities [1] - Ansteel has received a total of 163 patent authorizations this year, representing an increase of 1381.82% compared to the same period last year [1] Group 2 - In the first half of 2025, Ansteel invested 259 million yuan in research and development, which is a year-on-year increase of 35.6% [1] - The company has made investments in 54 enterprises and participated in 67,689 bidding projects [2] - Ansteel holds 15 trademark information entries, 10,953 patent information entries, 165 copyright information entries, and has 616 administrative licenses [2]