US Patent 10927612 Downhole auxiliary drilling apparatus
Is a
Date Filed
April 2, 2019
Date of Patent
February 23, 2021
Patent Application Number
16373169
Patent Citations
Patent Inventor Names
Yijin Zeng
0
Naihe Hou
0
Qunai Hu
0
Xiaojie Cui
0
Chenxi Zhao
0
Guangming Cheng
0
Jianjun Zhao
0
Lanrong Ma
0
Lianzhong Sun
0
Patent Jurisdiction
Patent Number
Patent Primary Examiner
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