一种新型多分支钻井系统已被研制开发出来 ,该系统可提供机械和液力分离式接合 ,而且还具有在主井眼和侧向井眼进行老井重钻的能力。该系统也是一个简单的机械运转装置 ,仅需要最少的起下钻次数就可完成接合 ,并达到机械和液力分离。多分支钻井技术的应用减少了生产压差 ,增加了油藏内的波及效率 ,从而大大地提高了油藏采收率。 A new multi-branch drilling system has been developed that offers both mechanical and hydrodynamic splice engagement, as well as the ability to re-drill old wells in both the main and lateral boreholes. The system is also a simple mechanical running device that requires only a minimum number of drillings to complete the joint and achieve mechanical and hydraulic separation. The application of multi-branch drilling technology reduces the production pressure difference and increases the wave efficiency in the reservoir, thus greatly improving the oil recovery.