Group 1 - The company Shengxin Anti-corrosion Co., Ltd. significantly enhances the corrosion resistance of oil and gas pipelines, extending their service life to 3-4 times longer than ordinary pipes, resulting in cost savings of approximately 72,000 yuan per ton [1] - Shengxin has established multiple research platforms, including an academic workstation and a key laboratory, and has applied for 60 national patents, with 39 currently valid, including 7 invention patents [1] - The company has successfully replaced imported materials through technological innovation and product upgrades, focusing on the oil equipment anti-corrosion sector for 18 years [1] Group 2 - Weima Equipment has developed high-performance special threaded drill rods and high-temperature corrosion-resistant coated drill rods, optimizing thread structures to meet the demands of high-efficiency drilling operations in complex oil fields [2] - Approximately 30% of Weima's products are exported to major oil-producing countries such as Russia, Turkey, Kuwait, and Algeria, in addition to supplying domestic companies like CNPC, Sinopec, and CNOOC [2] - The Dongying Economic and Technological Development Zone is actively building a high-end equipment manufacturing cluster focused on oil and marine wind power equipment, with 99 oil equipment companies and a comprehensive industrial production system of over 1,000 varieties [2]