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为供应地质队坚硬与高磨损性岩层用的高效率钻头,苏联地质部中央设计局与上谢尔加机械制造厂共同设计并制造了球齿牙轮钻头。钻头规格与目前钻探中所用的一致。试验的一批钻头直径为112,132和151毫米,其代号是2Д-112К,2Д-132К,2Д-151К。为供应地质队坚硬与高磨损性岩层用的高效率钻头,苏联地质部中央设计局与上谢尔加机械制造厂共同设计并制造了球齿牙轮钻头。钻头规格与目前钻探中所用的一致。试验的一批钻头直径为112,132和151毫米,其代号是2Д-112К,2Д-132К,2Д-151К。
In order to supply high-efficiency drill bits for the hard and highly abrasive formations of the geologic team, the Central Design Bureau of the Soviet Geological Department co-designed and manufactured the ball-bit cone bit with the Shekelija machinery factory. Drill specifications are consistent with those used in current drilling. The test batch of drill bits are 112, 132 and 151 mm in diameter, and are codenamed 2Д-112К, 2Д-132К, 2Д-151К. In order to supply high-efficiency drill bits for the hard and highly abrasive formations of the geologic team, the Central Design Bureau of the Soviet Geological Department co-designed and manufactured the ball-bit cone bit with the Shekelija machinery factory. Drill specifications are consistent with those used in current drilling. The test batch of drill bits are 112, 132 and 151 mm in diameter, and are codenamed 2Д-112К, 2Д-132К, 2Д-151К.