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为了适应我队开展金刚石小口径钻进的需要，在没有专用小口径钻机及钻具的条件下，组织了“三结合”的试验小组，充分依靠群众，进行了小口径钻进的技术配套工作，主要有如下几项：一、改造现用钻机1．在XU－600型钻机的离合器壳体与变速箱壳体之间增装一个增速箱，使钻机从原有3速增加到6个速度。该机于一九七五年七月投入现场生产使用，先后在磷矿和金矿两个矿区进行金刚石小口径钻进。至一九七六年四月止，共施工钻孔7个，进尺950米，纯钻进时间814小时，其中采用900转/分转速的为730小时，钻机稳定性良好。
In order to meet the needs of our team to carry out small diameter drilling of diamonds, the “three combined” experimental group was organized under the condition of no special small-diameter drilling rig and drilling tools, and full support was given to the technical cooperation work of small-diameter drilling , There are the following main: First, the transformation of existing drilling rig 1. In the XU-600 drilling rig clutch housing and gearbox between the addition of a gearbox, the rig from the original 3 speed to 6 speed. The aircraft put into production in July 1975 to use the site, one after another in the phosphate rock and gold mine two small diameter diamond drilling. By April 1976, a total of 7 drilling holes had been drilled, with a footage of 950 meters and a pure drilling time of 814 hours. The drilling rig with a rotating speed of 900 rpm was 730 hours and the stability of drilling rig was good.