So far, our company has successfully developed OCTG products with non-API standard premium connection, Such as DL-V series、DL-T series、DL-H series、DL- J series, which has the same performance as Vam series、Tenaris-Hydrill series、Hunting series and JFE series. Further more all of them have got the Chinese national patent .The application scope for premium connection includes 1.66—20 suitable for the steel grade N80 ,L80,C90,T95,P110,Q125.The above mentioned technical achievements have been applied in mass production with good comments from customers.
So far, our company has successfully developed OCTG products with non-API standard premium connection, Such as DL-V series、DL-T series、DL-H series、DL- J series, which has the same performance as Vam series、Tenaris-Hydrill series、Hunting series and JFE series. Further more all of them have got the Chinese national patent .The application scope for premium connection includes 1.66—20 suitable for the steel grade N80 ,L80,C90,T95,P110,Q125.The above mentioned technical achievements have been applied in mass production with good comments from customers.
