Research on Strength of Bilateral Support Bearing of PDC–Cone Hybrid Bit von Liu, Baxian, Yang, Liyuan, Pian, Xiaoxuan, Xie, Rui, Chen, Ting, Huang, Kuilin

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Application of Three-Dimensional Printing Technology to the Manufacture of Petroleum Drill Bits von Liu, Baxian, Wang, Yifei, Jiang, Junjie, Zhang, Bihui, Zhou, Jian, Huang, Kuilin

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Double-shaft supporting cone-PDC composite drill bit von LIU BAXIAN

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PDC (Polycrystalline Diamond Compact) drill bit with disc cutters and rotating teeth von NIU SHIWEI, HUANG KUILIN, LIU BAXIAN

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PDC (Polycrystalline Diamond Compact) bit capable of preventing ring cutting von SONG DONGDONG, NIU SHIWEI, ZHANG YANXIN, HUANG KUILIN, LIU BAXIAN

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Mechanical torsion impactor von NIU SHIWEI, ZHANG JINCHUAN, FU CHENG, HUANG KUILIN, LIU BAXIAN

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Automatic planet gear stepless speed variator von HONGWEI FU, BAXIAN DU, ZHONG LIU

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Full automatic single planetary gear staged speed variator von LIU ZHONG, FU HONGWEI, DU BAXIAN

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