公司可以提供外径范围从2 7/8〞到6 5/8〞、长度范围从5英尺到31英尺的各种长度的整体加重钻杆产品，包括普通加重钻杆、螺旋加重钻杆以及带有螺纹应力释放结构等特殊加工要求的加重钻杆产品。
        PDM can supply various of heavy weight drill pipes(HWDP) with the outer diameters from 2 7/8” to 6 5/8”，including integral HWDPs, spiral HWDPs, non magnetic HWDPs, and other special ones required by customers.
  
        注：整体加重钻杆螺旋切槽同螺旋钻铤的切槽基本相同，其尺寸和外形请参看钻铤部分的相关表格和图形。
        Note: Integral HWDP’s spiral grooves are basically the same as the grooves of spiral drill collars. For details please refer to the related tables for spiral drill collars.