Yanfu Huang

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Beijing, CN

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Patents Grantslast 30 patents

Information Patent Grant
Cementing plug
- Patent number 10,808,496
- Issue date Oct 20, 2020
- China National Petroleum Corporation
- Hongying Zhang
- E21 - EARTH DRILLING MINING
Information Patent Grant
Information transmission apparatus for logging while drilling
- Patent number 9,816,327
- Issue date Nov 14, 2017
- China National Petroleum Corporation
- Guanghua Liu
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
CEMENTING PLUG
- Publication number 20180313186
- Publication date Nov 1, 2018
- CHINA NATIONAL PETROLEUM CORPORATION
- Hongying Zhang
- E21 - EARTH DRILLING MINING
Information Patent Application
INFORMATION TRANSMISSION APPARATUS FOR LOGGING WHILE DRILLING
- Publication number 20150152726
- Publication date Jun 4, 2015
- CHINA NATIONAL PETROLEUM CORPORATION
- Guanghua Liu
- E21 - EARTH DRILLING MINING