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在上级党委的正确领导下，1975年，我队在某矿区矿段进行天然金刚石钻头小口径钻进试验。刚开始时，由于我们在思想和物质上准备不足，操作技术不熟练，出现了一些问题。通过总结经验和组织工人和技术人员到先进单位参观学习，改进了操作方法，采用了新的技术措施，初步掌握了金刚石钻进规范。1975年10月份施工的ZK401孔，终孔313米，只用两个表镶金刚石钻头，平均钻头进尺129.2米，钻头最高进尺164.54米，平均岩心采取率96％，矿心采取率为100％，终孔弯曲度3度30分，详见下表。
Under the correct leadership of the party committee at a higher level, in 1975, our team conducted a test of small diameter drilling of natural diamond bits in a mining area. At the beginning, some problems arose because we were not mentally and physically prepared and unskilled in operating skills. Through summing up experience and organizing workers and technicians to advanced units to visit and study, improving the operation method, adopting new technical measures and initially grasping the diamond drilling specifications. In October 1975 construction of ZK401 hole, the final hole 313 meters, with only two table set diamond drill bit, the average bit into the 129.2 meters, the highest bit 164.54 meters drill, the average core rate of 96%, mining rate of 100% Final hole curvature of 3 degrees 30 minutes, see the table below.