Guangjun Ma

3 Patents

• US124803652025

  State Self-adaptive Turbine Type Pulse Generator and Downhole Drilling Tool

  SINOPEC PETROLEUM ENGINEERING TECHNOLOGY RESEARCH INSTITUTE CO., Ltd.

  0 cites
• US120314102024

  Well Drilling Tool and Method for Determining Parameter Thereof

  Sinopec Petroleum Engineering Technology Research Institute Co., Ltd.

  0 cites
• US118984172024

  Drilling Speed Increasing Device

  SINOPEC PETROLEUM ENGINEERING TECHNOLOGY RESEARCH INSTITUTE CO., Ltd.

  0 cites