Oil & Gas
| Tue 28 Jul 2026
Beijing, July 28 -- CNPC Greatwall Drilling and China National Petroleum have applied Chinese patent for Foam Stabilizer as Well as Preparation Method and Application Thereof. Yang Peng, Kuang Xubing, Wang Yehan, Guan Jian, Meng Qingliang, Yuan Wei, Qian Zhiwei, Wang Xiaojun, Hong Wei, Liu Chang, Ren Haiyang, Gao Qingchun, Wang ..