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孔钻进

孔钻进

孔钻进

孔钻进

1

Since the inception of this project in 1998 , three pre-pilot holes have been completed and the main hole has reached a depth of over 3500 m .

从 98年开始，已经完成 3 个预先导孔的钻探工作，主孔钻进深度已经超过 3500 米。

2

The Larger Reverse Circulation Bits Used for Drilling Through Pebbles

卵砾石层大直径反循环桩孔钻进用钻头

3

The Applications of Bored Pile Drilling Tech. In Large Floating Rock in Changchun Light Rail Project

长春市轻轨工程大漂石地层灌注桩成孔钻进技术

4

Smaller Diameter Borehole Pilot Drilling Method in Gravel Formation

卵石层小口径引孔钻进施工方法

5

Development and Orientation of Hole-drilling Device for Bolting in Coal Mining

煤矿锚杆孔钻进设备的发展前景

6

DTH Drilling Technique for Guiding Hole in Sea Area Full of Boulder in Mawan Shenzhen City

深圳妈湾巨石填海区风动潜孔锤引孔钻进工艺

7

Research and practices on deep borehole drilling technology in soft rock

软岩深孔钻进技术的研究与实践

8

Deviation rectify technique for flat hole of coal bed methane

煤层气近水平孔钻进纠偏技术

9

Drilling Technology and Experience of Deep Hole

钻探深孔钻进技术与经验

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