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          Record breakers know the drill
          
        
          
      
          
      
          
        
          
          China Daily |
          Updated: 2023-02-25 10:37
          
          
          
          
        


        
      
          
      
          
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   Valves undergo regular maintenance checks. 
  JIN TIAN/FOR CHINA DAILY 
 
           

           

          Due to the complicated geological conditions and challenges, such as high temperatures, pressure and sulfur content, it took the team from CNPC Chuanqing Drilling Engineering more than one and a half years to finish exploration work at the site.
           

          
        
          

        
        
      
          
        
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