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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