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Sichuan, CN
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Patents Grants
last 30 patents
Information
Patent Grant
Spiral magnetic fluid composite sealing structure of roller bit
Patent number
12,018,529
Issue date
Jun 25, 2024
SOUTHWEST PETROLEUM UNIVERSITY
Yi Zhou
E21 - EARTH DRILLING MINING
Information
Patent Grant
Split roller cone and PDC composite drill bit
Patent number
10,822,881
Issue date
Nov 3, 2020
SOUTHWEST PETROLEUM UNIVERSITY
Jialin Tian
E21 - EARTH DRILLING MINING
Information
Patent Grant
Vertical high speed testing device for spiral seal of cone bit bearing
Patent number
10,429,274
Issue date
Oct 1, 2019
Southwest Petrolem Univeristy
Yi Zhou
E21 - EARTH DRILLING MINING
Information
Patent Grant
Horizontal high speed testing device for spiral seal of horizontal...
Patent number
10,393,615
Issue date
Aug 27, 2019
Southwest Petroleum University
Yi Zhou
G01 - MEASURING TESTING
Patents Applications
last 30 patents
Information
Patent Application
SPIRAL MAGNETIC FLUID COMPOSITE SEALING STRUCTURE OF ROLLER BIT
Publication number
20230374864
Publication date
Nov 23, 2023
SOUTHWEST PETROLEUM UNIVERSITY
Yi ZHOU
E21 - EARTH DRILLING MINING
Information
Patent Application
Split Roller Cone and PDC Composite Drill Bit
Publication number
20190360274
Publication date
Nov 28, 2019
SOUTHWEST PETROLEUM UNIVERSITY
Jialin TIAN
E21 - EARTH DRILLING MINING
Information
Patent Application
VERTICAL HIGH SPEED TESTING DEVICE FOR SPIRAL SEAL OF CONE BIT BEARING
Publication number
20180348090
Publication date
Dec 6, 2018
Southwest Petroleum University
Yi Zhou
E21 - EARTH DRILLING MINING
Information
Patent Application
HORIZONTAL HIGH SPEED TESTING DEVICE FOR SPIRAL SEAL OF HORIZONTAL...
Publication number
20180348082
Publication date
Dec 6, 2018
Southwest Petroleum University
Yi Zhou
E21 - EARTH DRILLING MINING