Group 1 - The State Intellectual Property Office of China shows that China National Petroleum Corporation (CNPC) and China Petroleum Group Engineering Materials Research Institute have applied for a patent titled "An Aging Detection Device and Method for Inner-Inserted Polyethylene Pipeline," with publication number CN121410104A and application date of July 2024 [1] - The patent involves a non-destructive testing technology that allows for on-site testing of the aging status of in-service inner-inserted polyethylene pipelines in oil fields, minimizing the impact on production operations as it does not require excavation or sampling analysis [1] - CNPC, established in 1990 and headquartered in Beijing, primarily engages in oil and gas extraction, with a registered capital of 48.69 billion RMB. The company has invested in 109 enterprises, participated in 5,000 bidding projects, and holds 1,439 trademark records and 5,000 patent records [1] Group 2 - China Petroleum Group Engineering Materials Research Institute, founded in 2021 and located in Xi'an, focuses on specialized equipment manufacturing, with a registered capital of 679.11 million RMB. The institute has invested in 4 enterprises, participated in 1,710 bidding projects, and holds 15 trademark records and 872 patent records [2]