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Record breakers know the drill

China Daily | Updated: 2023-02-25 10:37
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Engineer Zhu Wanmu tests the density of mud, which is used to aid the drilling of boreholes. JIN TIAN/FOR CHINA DAILY

"The depth is a record for the deepest vertical well in Asia, which provides a strong engineering and technical guarantee for ultra-deep oil and gas exploration in China," says Ma Yong, deputy director of engineering technology at PetroChina Southwest Oil and Gasfield.

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