Cong Zhang

Follow

Person

Qingdao, CN

People

Patents Applicationslast 30 patents

Information Patent Application
BEAM PUMPING UNIT AND DESIGN METHOD FOR BEAM PUMPING UNIT
- Publication number 20230383739
- Publication date Nov 30, 2023
- APEX OILFIELD EQUIPMENT (QINGDAO) CO., LTD
- Cong ZHANG
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Application
LONG STROKE BEAM PUMPING UNIT
- Publication number 20230043079
- Publication date Feb 9, 2023
- APEX OILFIELD EQUIPMENT (QINGDAO) CO., LTD
- Cong ZHANG
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Application
Lubricant Structure and Lubricant Method for Belt Pumping Unit
- Publication number 20220341418
- Publication date Oct 27, 2022
- Derui Petroleum Equipment (Qingdao) Co., Ltd., aka Apex Oilfield Equipment (Q...
- Cong Zhang
- E21 - EARTH DRILLING MINING
Information Patent Application
Fore and Aft Assembly of Belt-Type Pumping Unit
- Publication number 20220341266
- Publication date Oct 27, 2022
- Derui Petroleum Equipment (Qingdao) Co., Ltd., aka Apex Oilfield Equipment (Q...
- Cong Zhang
- E21 - EARTH DRILLING MINING