Zhishen Su

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Heilongjiang, CN

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Patents Grantslast 30 patents

Information Patent Grant
Non-beam pumping unit driven by a motor reduction unit
- Patent number 10,378,531
- Issue date Aug 13, 2019
- Daqing Dannuo Petroleum Technology Development Co., Ltd.
- Zhishen Su
- E21 - EARTH DRILLING MINING
Information Patent Grant
Hand brake system used on pumping unit without walking beam
- Patent number 10,233,985
- Issue date Mar 19, 2019
- Daqing Dannuo Petroleum Technology Development Co., Ltd.
- Zhishen Su
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Non-beam pumping unit driven by a biaxial motor
- Patent number 10,184,467
- Issue date Jan 22, 2019
- Daqing Dannuo Petroleum Technology Development Co, Ltd.
- Zhishen Su
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...