DRILLING & PRODUCTION ENGINEERING TECHNOLOGY RESEARCH INSTITUTE OF CNPC CHUANGQING DRILLING EXPLORATION COMPANY

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GUANGHAN, CN

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WD sidewall coring tool
- Patent number 9,631,431
- Issue date Apr 25, 2017
- DRILLING & PRODUCTION ENGINEERING TECHNOLOGY RESEARCH INSTITUTE OF CNPC CHUAN...
- Li Chen
- E21 - EARTH DRILLING MINING

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