self-erection rig是什么意思

网络释义

用法例句

The present status and prospect of mineral exploration drilling market in China were summarized,and also the advantages and disadvantages and the comprehensive efficiencies of the conventional spindle drills and the fully-hydraulic top-drive head drills were discussed.

概述了我国地质找矿钻探市场现状及前景,分析研究了地质取样钻探传统的立轴钻机及全液压动力头钻机的优缺点及综合效能,针对国家提出加强地质工作的形势及中国的实际状况,提出了完善和改进我国现有钻探设备、提高我国地质找矿取样钻探效率、降低能耗及成本的观点及建议。

The paper introduces the improvement on chuck of spindle drill to realize the inner assembly fishing without re- gressing the drill.

介绍了通过对现有立轴钻机卡盘改进实现绳索取心钻进机上打捞内管总成、无让车加接钻杆的应用情况, 提出了利用现有立轴岩心钻机提高绳索取心钻探效率、减少复杂地层钻进施工孔内坍塌事概率、降低劳动强度及提高时间利用率的创新观点。

Break analysis of the centre tube of well drill;

立井钻机中心管的断裂分析