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一种适用于市政、铁道、石油、地质等部门地下水平钻孔施工的新型工程机械——GP-220型水平工程钻机已由北京市市政工程研究所和张家口探矿机械厂联合研制成功。地质矿产部装备工业公司于1987年1月在张家口市组织并通过了技术鉴定,由张家口探矿机械厂进行小批量生产。该机是国内首创采用双重管正循环钻进的水平钻机。试验证明,具有性能良好、工艺先
A new type of construction machinery, GP-220 horizontal engineering drilling rig, which is suitable for underground horizontal drilling construction in municipal, railway, petroleum, and geological departments, has been jointly developed by the Beijing Municipal Engineering Research Institute and the Zhangjiakou Prospecting Machinery Plant. The Ministry of Geology and Minerals Equipment Industry Corporation organized and passed the technical appraisal in Zhangjiakou City in January 1987, and the Zhangjiakou Prospecting Machinery Plant carried out small-batch production. This machine is the first horizontal drilling rig in China that adopts double pipe positive circulation drilling. Tests prove that it has good performance and technology