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Liu Yongsheng

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Publication

Featured researches published by Liu Yongsheng.

Archive | 2017

Negative pressure pulse drill bit is spouted soon at crossing center of runner

Wei Zheng; Liu Yongsheng; Gao Deli

Archive | 2017

Anti - circulatory -pulse pumping drilling rod nipple joint

Wei Zheng; Liu Yongsheng; Gao Deli

Archive | 2017

Anti - circulatory -pulse pumping drill bit of autogyration

Wei Zheng; Liu Yongsheng; Gao Deli

Archive | 2017

Self-rotation pulse internal grinding drill bit for horizontal well

Gao Deli; Wei Zheng; Liu Yongsheng

Archive | 2017

Self -excited oscillation pulse reinforcing formula internal grinding drill bit

Wei Zheng; Liu Yongsheng; Gao Deli

Archive | 2017

Anti - circulatory -pulse pumping drill bit of helmholtz formula

Wei Zheng; Liu Yongsheng; Gao Deli

Archive | 2017

Self-oscillation pulse reinforcement type inner grinding drill bit

Gao Deli; Wei Zheng; Liu Yongsheng

Archive | 2017

Horizontal well pulse internal grinding drilling rod nipple joint

Wei Zheng; Liu Yongsheng; Gao Deli

Archive | 2017

Tandem type pulse enhanced internal grinding drill bit

Gao Deli; Wei Zheng; Liu Yongsheng

Archive | 2017

Helmholtz formula pulse internal grinding drill bit

Wei Zheng; Liu Yongsheng; Gao Deli

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Collaboration

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