Chenggang YU

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Chengdu, CN

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Patents Grantslast 30 patents

Information Patent Grant
Downhole throttling device based on wireless control
- Patent number 11,946,349
- Issue date Apr 2, 2024
- PetroChina Company Limited
- Jun Xie
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
DOWNHOLE THROTTLING DEVICE BASED ON WIRELESS CONTROL
- Publication number 20220205346
- Publication date Jun 30, 2022
- Petrochina Company Limited
- Jun Xie
- E21 - EARTH DRILLING MINING
Information Patent Application
COLLAPSIBLE SUPPORT RINGS FOR A DOWNHOLE SYSTEM
- Publication number 20190071949
- Publication date Mar 7, 2019
- CNPC USA Corp.
- Perry M. BATSON
- E21 - EARTH DRILLING MINING