After repairing the products, on-the-spot trials and cost analysis, the following conclusions can be drawn：8 Conclusions：
Abstract: This paper introduces One type of PDC drill bit repair technique. First of all, confirm the steel body PDC bit which has been already used can be repaired. After pretreated the drill bit that meets the repair conditions, heat it at a speed of 8-10 ° C / min, and heat to about 620 […]… Learn more.
