Wenfei LI

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Beijing, CN

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Patents Grantslast 30 patents

Information Patent Grant
Three-dimensional ventilation method and system for mining by 110 c...
- Patent number 12,168,932
- Issue date Dec 17, 2024
- CHINA UNIVERSITY OF MINING & TECHNOLOGY, BEIJING
- Jiong Wang
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mining method without coal pillars with roof-cutting and roadway re...
- Patent number 12,168,931
- Issue date Dec 17, 2024
- CHINA UNIVERSITY OF MINING & TECHNOLOGY, BEIJING
- Jiong Wang
- E21 - EARTH DRILLING MINING
Information Patent Grant
Sand control screen for heavy oil thermal recovery
- Patent number 10,767,450
- Issue date Sep 8, 2020
- Starse Energy and Technology (Group) Co., Ltd.
- Huian Yi
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Mining Method Without Coal Pillars With Roof-Cutting And Roadway Re...
- Publication number 20230258083
- Publication date Aug 17, 2023
- CHINA UNIVERSITY OF MINING & TECHNOLOGY, BEIJING
- Jiong Wang
- E21 - EARTH DRILLING MINING
Information Patent Application
Three-Dimensional Ventilation Method And System For Mining By 110 C...
- Publication number 20230175398
- Publication date Jun 8, 2023
- CHINA UNIVERSITY OF MINING & TECHNOLOGY, BEIJING
- Jiong Wang
- E21 - EARTH DRILLING MINING
Information Patent Application
COMPOSITE WATER-CONTROLLING AND FLOW-LIMITING DEVICE AND SCREEN PIP...
- Publication number 20200102806
- Publication date Apr 2, 2020
- STARSE ENERGY AND TECHNOLOGY (GROUP) CO., LTD.
- Huian YI
- E21 - EARTH DRILLING MINING
Information Patent Application
SAND CONTROL SCREEN FOR HEAVY OIL THERMAL RECOVERY
- Publication number 20190195052
- Publication date Jun 27, 2019
- STARSE ENERGY AND TECHNOLOGY (GROUP) CO., LTD.
- Huian YI
- E21 - EARTH DRILLING MINING