CNPC DRILLING RESEARCH INSTITUTE

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Beijing, CN

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Patents Grantslast 30 patents

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
Information Patent Grant
Guide device for coiled tubing
- Patent number 9,316,069
- Issue date Apr 19, 2016
- China National Petroleum Corporation
- Sanpo Zhang
- 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
MECHANICAL AND HYDRAULIC DUAL-EFFECT EXPANSION DEVICE FOR WELL DRIL...
- Publication number 20180202267
- Publication date Jul 19, 2018
- CHINA NATIONAL PETROLEUM CORPORATION
- Binggui XU
- E21 - EARTH DRILLING MINING
Information Patent Application
CASING WINDOWING METHOD AND TOOL USING COILED TUBING
- Publication number 20170152718
- Publication date Jun 1, 2017
- CHINA NATIONAL PETROLEUM CORPORATION
- Yanping 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
Information Patent Application
GUIDE DEVICE FOR COILED TUBING
- Publication number 20140048249
- Publication date Feb 20, 2014
- CHINA NATIONAL PETROLEUM CORPORATION
- Sanpo Zhang
- E21 - EARTH DRILLING MINING

Trademarklast 30 trademarks