Tools and Machinery
| Mon 01 Dec 2025
Beijing, Dec. 2 -- CNBM Shandong Survey And Design Inst Co Ltd has been granted a patent for Anti-collapse Casing Tool for Stratum Drilling Exploration. This invention was developed by Jiang Wenfu, Sun Wenlai, Chi Lei, Cheng Kang, Liu Haiquan, Ouyang Youhe, Guo Chao, Wang Haicheng, Yuan Zhihua, Ma Qizhi, Wei Jun and Sun Maoxin.
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