Sou Hu Cai Jing·2025-12-06 06:46Group 1 - China Petroleum Engineering Co., Ltd. has obtained a patent for a "Welding Platform and Method for Pressure Vessels," with authorization announcement number CN116140888B, applied for on November 2021 [1] - China Petroleum Engineering Co., Ltd. was established in 1999, located in Karamay City, with a registered capital of 55,831.47471 million RMB [1] - The company has made investments in 6 enterprises, participated in 302 bidding projects, and holds 253 patents along with 13 administrative licenses [1] Group 2 - China National Petroleum Corporation (CNPC) was founded in 1990, located in Beijing, with a registered capital of 48,690,000 million RMB [2] - CNPC has invested in 111 enterprises, participated in 5,000 bidding projects, and possesses 5,000 patents along with 28 administrative licenses [2] - China National Petroleum First Construction Co., Ltd. was established in 1984, located in Luoyang City, with a registered capital of 50,084.9984 million RMB [2] - The First Construction Company has invested in 4 enterprises, participated in 3,520 bidding projects, and holds 213 patents along with 181 administrative licenses [2]