Inventor
HAO GUIQING
CN4 patents
Patents
4 patentsUS10180064B2Jan 15, 2019
System for sampling from formation while drilling
CHINA NAT OFFSHORE OIL CORP2 citations64
US10018038B2Jul 10, 2018
Drilling type sidewall coring apparatus
CHINA NAT OFFSHORE OIL CORP1 citations47
US10208736B2Feb 19, 2019
High-pressure fluid mixing pump control system and fluid suction control method
CHINA NAT OFFSHORE OIL CORP0 citations43
US10236667B2Mar 19, 2019
Wire follow-up protection structure of electric reducer
CHINA NAT OFFSHORE OIL CORP0 citations37