Inventor
LIU TIEMIN
CN9 patents
⚠️ This page may combine multiple inventors who share the name “LIU TIEMIN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CHINA NAT OFFSHORE OIL CORP
5 patentsUS12012816B2Jun 18, 2024
Core detection device of coring instrument and spacer insertion device
CHINA NAT OFFSHORE OIL CORP0 citations59
US11739603B2Aug 29, 2023
Core detection device of coring instrument
CHINA NAT OFFSHORE OIL CORP0 citations59
US10018038B2Jul 10, 2018
Drilling type sidewall coring apparatus
CHINA NAT OFFSHORE OIL CORP1 citations47
US11028658B2Jun 8, 2021
Horizontal-to-vertical drilling module for deep well
CHINA NAT OFFSHORE OIL CORP0 citations46
US10236667B2Mar 19, 2019
Wire follow-up protection structure of electric reducer
CHINA NAT OFFSHORE OIL CORP0 citations37
CHINA OILFIELD SERVICES LTD
4 patentsUS12025159B2Jul 2, 2024
Hydraulic power system for downhole device and downhole device
CHINA OILFIELD SERVICES LTD2 citations70
US11905829B2Feb 20, 2024
Integrated logging instrument for coring and sampling
CHINA OILFIELD SERVICES LTD3 citations69
US12235194B2Feb 25, 2025
Coring device
CHINA OILFIELD SERVICES LTD0 citations49
US12359519B2Jul 15, 2025
Coring and sampling integrated sub and downhole instrument
CHINA OILFIELD SERVICES LTD0 citations45