NBZB(SH:600857) Sou Hu Cai Jing·2025-12-09 07:29Group 1 - The State Intellectual Property Office of China has granted a patent for a device and method for detecting pearl sand sedimentation in low-temperature liquid storage tanks to China Petroleum & Chemical Corporation, Sinopec Petroleum Engineering Technology Services Co., Ltd., and Sinopec Zhongyuan Petroleum Engineering Design Co., Ltd. The patent announcement number is CN117533666B, with an application date of December 2023 [1][2]. Group 2 - China Petroleum & Chemical Corporation, established in 1983 and located in Beijing, primarily engages in oil and gas extraction. The company has a registered capital of 32,654,722.2 thousand RMB and has invested in 64 enterprises, participated in 5,000 bidding projects, and holds 4,927 patents [1]. - Sinopec Petroleum Engineering Technology Services Co., Ltd., founded in 1994 and also based in Beijing, focuses on extraction and auxiliary activities. The company has a registered capital of 1,898,434.0033 thousand RMB, invested in 14 enterprises, participated in 153 bidding projects, and holds 5,000 patents [1]. - Sinopec Zhongyuan Petroleum Engineering Design Co., Ltd., established in 1993 and located in Zhengzhou, specializes in professional technical services. The company has a registered capital of 10,000 thousand RMB, invested in 2 enterprises, participated in 2,968 bidding projects, and holds 269 patents [2].