Group 1 - The State Intellectual Property Office of China shows that China National Petroleum Corporation (CNPC) and China Petroleum Group Changqing Drilling Engineering Company have applied for a patent titled "A controllable solidification plugging resin system suitable for malignant well leakage formations and its preparation method and application," with publication number CN121343576A and application date of July 2024 [1] - The patent provides a resin system composed of the following mass percentages: resin matrix 35-55wt%, curing agent 1-15wt%, dispersant 1-10wt%, solubilizer 1-5wt%, catalyst 1-3wt%, crosslinking agent 1-3wt%, flow modifier 1-5wt%, weighting material 1-8wt%, with the remainder being water, totaling 100% [1] - The controllable solidification plugging resin system is characterized by strong sealing performance and compressive strength under high temperature and high pressure conditions [1] Group 2 - China National Petroleum Corporation was established in 1990 and is based in Beijing, primarily engaged in oil and gas extraction, with a registered capital of 48,690 million RMB [2] - CNPC has invested in 107 companies, participated in 5,000 bidding projects, and holds 1,442 trademark records and 5,000 patent records, along with 28 administrative licenses [2] - China Petroleum Group Changqing Drilling Engineering Company was established in 2008 and is also based in Beijing, with a registered capital of 2,770 million RMB [2] - The company has invested in 3 enterprises, participated in 5,000 bidding projects, and holds 16 trademark records and 1,871 patent records, along with 25 administrative licenses [2]