Inventor
LI QINGYUN
CN15 patents
⚠️ This page may combine multiple inventors who share the name “LI QINGYUN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
LI QINGYUN
4 patentsUNIV CHINA PETROLEUM EAST CHINA
4 patentsUS11085245B2Aug 10, 2021
Multi-path combined high-low voltage plasma rock-breaking drill bit, drill bit apparatus and drilling method
UNIV CHINA PETROLEUM EAST CHINA2 citations69
US11293231B2Apr 5, 2022
Multi-path combined high-low voltage plasma drilling method, drill bit for drilling and drill bit apparatus for drilling
UNIV CHINA PETROLEUM EAST CHINA0 citations60
US11268326B2Mar 8, 2022
Multi-path combined high-low voltage plasma drilling power source and drillling system
UNIV CHINA PETROLEUM EAST CHINA0 citations48
US9970270B2May 15, 2018
Movable combined sand control pipe of axial and radial slotted screen pipes
UNIV CHINA PETROLEUM EAST CHINA0 citations37