1.The weight of the drilling pump is large, it is difficult to adapt to the requirements of the modern portable drilling rig, which restricts the movement of the drilling rig.
2. The stroke is short, the flushing time is high, and the drilling pump is not suitable for the working of the flushing time range, which causes the short life of the hydraulic end.
3. Pump pressure is low, can not fully meet the needs of modern drilling technology.
4. The structure is not reasonable, some strength is redundant, some rigidity is insufficient, the reliability is low, it is difficult to meet the requirement of drilling rig high reliability.
5.Cylinder jacket life is short, it is difficult to meet the requirements of drilling rig.
