This bit drill from 2230m to 3102m at southwest of China end on 8th, April, 2020.. Total drilled 872m. Average 12m/h. In the middle there is some extreme hard layer, but one PDC bit reach to the target depth and only very less wear. It broke the record of the same block. The customer use our 1616 flat cutter in the first arrow in shoulder position. The customer is very happy and get the end user appreciation.