Drilling speed increasing device

Assignee

• China Petroleum & Chemical
• Sinopec Petroleum Engineering Technology Research Institute Co.

Inventors

• Jiachang Wang (5 patents)
• Haiping Zhang (113 patents)
• Yanbin Zang (4 patents)
• Mingguang Sun (4 patents)
• Guangjun Ma (2 patents)
• Lishuang WANG (5 patents)
• Lingchao Xuan (5 patents)
• Xiaodan Liu (15 patents)
• Renlong Zhang (8 patents)

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