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我局72年开始进行金刚石小口径钻探，到79年底共完成混合进尺十二万二千多米，有7个队先后开动过金刚石小口径钻机，占全局12个钻探队的58％；79年共有3个队共开动16台小口径钻机，占全局计划开动钻机的23％左右，完成混合钻进工作量44050.18米，约占全局完成工作量的30％，平均台效396米。使用天然金刚石钻头330个，进尺29759米，平均钻头寿命90.4米，最高钻头寿命904.31米。使用人造金刚石钻头21个，进尺558.43米，平均钻头寿命24.4米。79年全局共完工小口径钻孔108个，优质孔81个，占75％。
Our bureau began drilling small diameter diamonds in 1972. By the end of 1979, a total footage of more than 122,000 meters has been completed. Seven teams have started drilling small diameter diamond drilling machines, accounting for 58% of the 12 drilling teams in the world. 79 years A total of three teams launched a total of 16 small-diameter drilling rigs, accounting for about 23% of the planned global drilling rigs. The total number of hybrid drilling operations was 44050.18 meters, accounting for 30% of the total global workload, with an average efficiency of 396 meters. The use of natural diamond drill 330, footage 29,959 meters, the average drill life of 90.4 meters, the highest life of 904.31 meters drill. The use of artificial diamond drill 21, footage into 558.43 meters, the average drill life of 24.4 meters. In the last 79 years, a total of 108 small-diameter drilled holes were completed and 81 high-quality holes accounted for 75% of the total.