Qianwen TANG

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Dongying, CN

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Patents Grantslast 30 patents

Information Patent Grant
Device for handling oil pipes and method for workover
- Patent number 9,932,784
- Issue date Apr 3, 2018
- China Petroleum and Chemical Corporation
- Zenglin Wang
- E21 - EARTH DRILLING MINING
Information Patent Grant
Apparatus for tripping oil pipe and system for automatic well workover
- Patent number 9,732,570
- Issue date Aug 15, 2017
- China Petroleum and Chemical Corporation
- Minxuan Wang
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
DEVICE FOR HANDLING OIL PIPES AND METHOD FOR WORKOVER
- Publication number 20160281445
- Publication date Sep 29, 2016
- China Petroleum and Chemical Corporation
- Zenglin WANG
- E21 - EARTH DRILLING MINING
Information Patent Application
Apparatus for Tripping Oil Pipe and System for Automatic Well Workover
- Publication number 20150197997
- Publication date Jul 16, 2015
- China Petroleum and Chemical Corporation
- Minxuan WANG
- E21 - EARTH DRILLING MINING