INZONE GROUP(SH:600858) Sou Hu Cai Jing·2026-02-24 05:17Group 1 - The State Intellectual Property Office of China has granted a patent for a "Horizontal Well Loss and Cleaning Simulation Combined Testing Device" to Sinopec Petroleum Engineering Technology Service Co., Ltd. and Sinopec East China Petroleum Engineering Co., Ltd., with the announcement number CN114575824B and application date in March 2022 [1] - Sinopec Petroleum Engineering Technology Service Co., Ltd. was established in 2012 in Beijing, focusing on research and experimental development, with a registered capital of 4 billion RMB. The company has made one external investment, participated in 32 bidding projects, and holds 2,469 patent records, along with 4 administrative licenses [1] - Sinopec East China Petroleum Engineering Co., Ltd. was also established in 2012 in Nanjing, primarily engaged in civil engineering construction, with a registered capital of approximately 864.3 million RMB. The company has made three external investments, participated in 2,493 bidding projects, and holds 287 patent records, along with 55 administrative licenses [1]