Jin Rong Jie·2025-05-16 04:50Group 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 "A Composite Resin and Its Preparation Method and Application," with publication number CN119978705A, and the application date is November 2023 [1] - The patent abstract indicates that the composite resin consists of 30%-50% epoxy resin, 10%-30% curing agent, 0.1%-5% aerogel silica, 3%-8% silane coupling agent, 5%-15% toughening agent, 3%-10% styrene-maleic anhydride copolymer, 3%-15% nano solid lubricant, 2%-10% nano magnetic particles, and 10%-40% diluent, which provides good sealing performance, high-temperature resistance, and strong adhesion, meeting the requirements for sealing, lubrication, and service life of the inner surface of downhole pipe columns [1] - CNPC was established in 1990 and is primarily engaged in gas production and supply, with a registered capital of 48.69 billion RMB, having invested in 106 companies and participated in 5,000 bidding projects, holding 1,443 trademark records and 5,000 patent records, along with 28 administrative licenses [1] Group 2 - China Petroleum Group Engineering Materials Research Institute was established in 2021 and focuses on research and experimental development, with a registered capital of 679.11 million RMB, having invested in 4 companies and participated in 1,183 bidding projects, holding 15 trademark records and 554 patent records, along with 16 administrative licenses [2]