Customer Q 20220424 provided a case, using 1613BIM-1 to make a 6 1/2 drill bit, with 1 smith cutter on each blade, the first drilling of the second opening of the small hole in Ansai County, from the 500-meter Yan'an Formation layer enter the well and drill to the bottom of the Liujiagou formation at 2550 meters, with a footage of 2050 meters. Customers are satisfied.