CHINA NATIONAL PETROLEUM CORPORATION CHUANQING DRILLING ENGINEERING CO., LTD

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SICHUAN, CN

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Patents Grantslast 30 patents

Information Patent Grant
Method of controlling well bore pressure based on model prediction...
- Patent number 9,638,031
- Issue date May 2, 2017
- CHINA NATIONAL PETROLEUM CORPORATION CHUANQING DRILLING ENGINEERING CO., LTD.
- Zhilin Li
- E21 - EARTH DRILLING MINING