Group 1 - The core point of the article is that China National Petroleum Corporation (CNPC) has obtained a patent for a water-based drilling fluid high-dispersion fiber sealing agent, with the patent announcement number CN117625152B, applied for on November 2023 [1] Group 2 - CNPC was established in 1990 and is headquartered in Beijing, primarily engaged in oil and gas extraction, with a registered capital of 48.69 billion RMB [1] - CNPC has invested in 110 companies and participated in 5,000 bidding projects, holding 1,436 trademark records and 5,000 patent records, along with 28 administrative licenses [1] Group 3 - China National Petroleum Corporation Chuanqing Drilling Engineering Company, established in 2008 and located in Chengdu, is also focused on oil and gas extraction, with a registered capital of 1.16 billion RMB [1] - Chuanqing Drilling has invested in 12 companies, participated in 4,275 bidding projects, holds 4,334 patent records, and has 32 administrative licenses [1]