成都石油总机械厂研制的D215.9XHP_3型镶齿钻头于1984年荣获国家优质产品银牌奖。这次抽检的3只此型钻头,在兰州石油机械研究所石油钻采设备产品质量监测中心的台架复查测试中,对钻头轴承耐磨性、密封圈质量、齿的强度、固齿及分布,切削效率等有关数据进行了检测,分别以纯钻120h、104h和126h的指标,达到了质量分级标准的A级产品,符合国家规定的三牙轮镶齿钻头优 D215.9XHP_3 type insert bit developed by Chengdu Petroleum Machinery Factory won the national silver medal of high quality products in 1984. The sampling of the three bits of this drill, oil drilling equipment in Lanzhou Institute of Petroleum Products Quality Monitoring Center of bench review, the drill bearing wear resistance, seal quality, tooth strength, solid teeth and distribution , Cutting efficiency and other related data were tested, respectively, with pure diamond 120h, 104h and 126h of the index, reached the grading standards of quality A-level products, in line with the provisions of the national three-wheeled tooth bit