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1958年第11期“探矿与护矿”杂志曾报导,在乔尔诺考尔地质勘探队用3－650A型钻机钻进的钻孔深达835．1米,这是该类型钻机钻进最深的孔。捷克斯洛伐克社会主义共和国的一个地质机关于1962年用3－650A型钻机打了一个
1958, No. 11 “Prospecting and Mines” magazine has reported that drilling in the Johor Novo Geological Exploration Team with a 3-650A drilling rig up to a depth of 835.1 meters, which is the deepest drilling this type of rig Hole. A Geological Agency of the Socialist Republic of Czechoslovakia hit a 3-650A rig in 1962