Shu Li

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Chengdu, CN

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Patents Grantslast 30 patents

Information Patent Grant
Roller bit for rock breaking by rotary cutting
- Patent number 9,828,806
- Issue date Nov 28, 2017
- SICHUAN DEEP & FAST OIL DRILLING TOOLS CO., LTD
- Liang Zhang
- E21 - EARTH DRILLING MINING
Information Patent Grant
Modular cutting-teeth drill bit with controllable drilling specific...
- Patent number 9,562,398
- Issue date Feb 7, 2017
- Sichuan Deep & Fast Oil Drilling Tools Co., Ltd
- Liang Zhang
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Percussion and Cutting Composite Drilling Tool
- Publication number 20240344398
- Publication date Oct 17, 2024
- Sichuan DeepFast Oil Drilling Tools Co., Ltd
- Yaodong ZHENG
- E21 - EARTH DRILLING MINING
Information Patent Application
Percussion and Cutting Composite Drilling Tool
- Publication number 20230193694
- Publication date Jun 22, 2023
- Sichuan DeepFast Oil Drilling Tools Co., Ltd
- Yaodong ZHENG
- E21 - EARTH DRILLING MINING
Information Patent Application
Roller bit for rock breaking by rotary cutting
- Publication number 20140202773
- Publication date Jul 24, 2014
- Liang Zhang
- E21 - EARTH DRILLING MINING
Information Patent Application
Modular cutting-teeth drill bit with controllable drilling specific...
- Publication number 20130341100
- Publication date Dec 26, 2013
- Liang Zhang
- E21 - EARTH DRILLING MINING