DEURUI PETROLEUM EQUIPMENT (QINGDAO) CO., LTD.; A.K.A. APEX OILFIELD EQUIPMENT (QINGDAO) CO., LTD

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QINGDAO, CN

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Patents Grantslast 30 patents

Information Patent Grant
Fore and aft assembly of belt-type pumping unit
- Patent number 12,024,952
- Issue date Jul 2, 2024
- Deurui Petroleum Equipment (Qingdao) Co., Ltd.
- Cong Zhang
- E21 - EARTH DRILLING MINING
Information Patent Grant
Lubricant structure and lubricant method for belt pumping unit
- Patent number 12,025,121
- Issue date Jul 2, 2024
- Deurui Petroleum Equipment (Qingdao) Co., Ltd.
- Cong Zhang
- E21 - EARTH DRILLING MINING