Tools and Machinery
| Sat 10 Oct 2026
Beijing, Oct. 10 -- Lanzhou LS Petroleum Equipment Engineering has secured a patent on Bootstrapping Tower Type Derrick for Ocean Drilling Rig. Chang Baohua, Zhao Long, Zhang Bin, Yang Jianping, Zhu Bo, Qi Xiufang, Zhang Hong, Wei Haifeng, Tao Junkun, Liang Yi, Peng Fei, Liu Xingbang, Zhang Xuepeng and Wang Xiaoqin developed the..