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Patents Grants
last 30 patents
Information
Patent Grant
Core detection device of coring instrument and spacer insertion device
Patent number
12,012,816
Issue date
Jun 18, 2024
China National Offshore Oil Corporation
Zhibin Tian
G01 - MEASURING TESTING
Information
Patent Grant
Downhole oil level detection device
Patent number
11,788,405
Issue date
Oct 17, 2023
China Oilfield Services Limited
Zhibin Tian
E21 - EARTH DRILLING MINING
Information
Patent Grant
Core detection device of coring instrument
Patent number
11,739,603
Issue date
Aug 29, 2023
China National Offshore Oil Corporation
Zhibin Tian
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
Information
Patent Application
Core Detection Device of Coring Instrument and Spacer Insertion Device
Publication number
20230194388
Publication date
Jun 22, 2023
CHINA NATIONAL OFFSHORE OIL CORPORATION
Zhibin Tian
E21 - EARTH DRILLING MINING
Information
Patent Application
DOWNHOLE OIL LEVEL DETECTION DEVICE
Publication number
20220154573
Publication date
May 19, 2022
China Oilfield Services Limited
Zhibin Tian
E21 - EARTH DRILLING MINING
Information
Patent Application
CORE DETECTION DEVICE OF CORING INSTRUMENT
Publication number
20210285849
Publication date
Sep 16, 2021
CHINA NATIONAL OFFSHORE OIL CORPORATION
Zhibin Tian
G01 - MEASURING TESTING