Zemin Ji

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Beijing, CN

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Patents Grantslast 30 patents

Information Patent Grant
Borehole wall resistance increasing apparatus for improving energy...
- Patent number 11,428,065
- Issue date Aug 30, 2022
- PetroChina Company Limited
- Xinglong Chen
- E21 - EARTH DRILLING MINING
Information Patent Grant
Ultrasonic microbubble generation method, apparatus and system
- Patent number 11,344,824
- Issue date May 31, 2022
- PetroChina Company Limited
- Xinglong Chen
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Microbubble generation device and equipment
- Patent number 11,179,683
- Issue date Nov 23, 2021
- PetroChina Company Limited
- Xinglong Chen
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
METHOD AND APPARATUS FOR OIL PRODUCTION BY INCREASING RESISTANCE OF...
- Publication number 20210040827
- Publication date Feb 11, 2021
- Xinglong Chen
- E21 - EARTH DRILLING MINING
Information Patent Application
MICROBUBBLE GENERATION DEVICE AND EQUIPMENT
- Publication number 20200122098
- Publication date Apr 23, 2020
- Xinglong Chen
- E21 - EARTH DRILLING MINING
Information Patent Application
ULTRASONIC MICROBUBBLE GENERATION METHOD, APPARATUS AND SYSTEM
- Publication number 20200070067
- Publication date Mar 5, 2020
- Xinglong Chen
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL