Sou Hu Cai Jing·2026-01-23 15:50Group 1 - The State Intellectual Property Office of China has granted a patent for a "high-strength nano-hybrid soluble bridge plug and its preparation method and application" to China Petroleum Group Engineering Materials Research Institute Co., Ltd., China National Petroleum Corporation, and Xi'an Sanhuan Petroleum Pipe Technology Co., Ltd. The patent announcement number is CN120830475B, with an application date of September 2025 [1] Group 2 - China Petroleum Group Engineering Materials Research Institute Co., Ltd. was established in 2021 and is located in Xi'an. The company primarily engages in specialized equipment manufacturing with a registered capital of 679.11 million RMB. It has invested in 4 companies, participated in 1,705 bidding projects, holds 15 trademark registrations, 859 patents, and has 16 administrative licenses [1] - China National Petroleum Corporation was founded in 1990 and is based in Beijing. It primarily operates in the oil and gas extraction industry with a registered capital of 48.69 billion RMB. The company has invested in 107 enterprises, participated in 5,000 bidding projects, holds 1,440 trademarks, 5,000 patents, and has 28 administrative licenses [1] Group 3 - Xi'an Sanhuan Petroleum Pipe Technology Co., Ltd. was established in 1992 and is located in Xi'an. The company focuses on the oil, coal, and other fuel processing industries with a registered capital of 10 million RMB. It has invested in 1 company, participated in 147 bidding projects, holds 4 trademarks, 217 patents, and has 39 administrative licenses [2]