金刚石扩孔器系岩芯钻进中与钻头配套使用的重要扩孔工具。其重要作用是保持钻孔尺寸符合标准，提高钻杆稳定性，避免钻杆下部过于磨损。

    本产品唇部采用螺旋形设计，通水性能良好，胎体耐磨，金刚石包镶牢固，胎体与刚体粘结牢固。使用寿命长，国内享有盛誉。

    Diamond Reaming Shells are important tools to be used together with bits.Its main functions are maintaining borehole gage,improving drill string stability and protecting lower drill string from excessive wear.

Helical type reaming shell provides a good passage for drilling fluids. The matrix is wearproof,and its service life long.