The CDL tool is simple in structure consisting of tapered housing gland sub and clamp collar . The lower threads of the tool connect with the milling tool while the upper threads connect with fishing tool .

CDL测井仪打捞工具结构简单，主要由 锥度套、压盖短节和卡 箍组成，工具下螺纹与铣筒连接，上与打捞钻具连接。