Sou Hu Cai Jing·2026-01-20 03:40Group 1 - The core point of the article is that China National Petroleum Corporation (CNPC) has obtained a patent for a system and method related to the thermal reaction of oil sludge and water, with the patent announcement number CN117361813B and an application date of June 2022 [1] Group 2 - CNPC was established in 1990 and is headquartered in Beijing, primarily engaged in oil and natural gas extraction, with a registered capital of 48.69 billion RMB [1] - CNPC has made investments in 107 companies and participated in 5,000 bidding projects, holding 1,362 trademark records and 5,000 patent records, along with 28 administrative licenses [1] Group 3 - China National Petroleum Corporation Safety and Environmental Technology Research Institute Co., Ltd. was founded in 2007, also located in Beijing, focusing on research and experimental development, with a registered capital of 460 million RMB [1] - The research institute has invested in 5 companies, participated in 476 bidding projects, holds 9 trademark records and 615 patent records, and possesses 12 administrative licenses [1]