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| Fri 29 Sep 2023
Beijing, Sept. 29 -- Daqing Oilfield and PetroChina Co Ltd have submitted a patent application for old well and vertical well fracturing and energizing integrated optimization design method. This invention was developed by Wang Xianjun, Liu Yu, Zheng Jiming, Li Dongxu, Wang Wei, Zhang Hongtao, Gu Mingyong, Wang Hongda, Zhao Lian..