Lianpan Duan

Follow

Person

Yantai, CN

People

Patents Grantslast 30 patents

Information Patent Grant
Fracturing pump spacer frame
- Patent number 12,215,582
- Issue date Feb 4, 2025
- YANTAI JEREH OILFIELD SERVICES GROUP CO., LTD.
- Junlei Yao
- E21 - EARTH DRILLING MINING
Information Patent Grant
Electro-hydraulic hybrid drive sand-mixing equipment
- Patent number 11,480,040
- Issue date Oct 25, 2022
- Yantai Jereh Petroleum Equipment & Technologies Co., Ltd.
- Maomao Han
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL

Patents Applicationslast 30 patents

Information Patent Application
Fracturing Pump Spacer Frame
- Publication number 20250034975
- Publication date Jan 30, 2025
- YANTAI JEREH OILFIELD SERVICES GROUP CO., LTD.
- Junlei YAO
- E21 - EARTH DRILLING MINING
Information Patent Application
ELECTRO-HYDRAULIC HYBRID DRIVE SAND-MIXING EQUIPMENT
- Publication number 20200400005
- Publication date Dec 24, 2020
- YANTAI JEREH PETROLEUM EQUIPMENT & TECHNOLOGIES CO., LTD.
- Maomao Han
- E21 - EARTH DRILLING MINING