Diamond drilling completes the cascade

被引：0

作者：

Jennings, Martin

机构：

来源：

Industrial Diamond Review | 2002年 / 62卷 / 595期

关键词：

Diamond cutting tools - Jets - Reinforced concrete;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The completion of Grand Cascade by Lloyd Drilling Ltd using diamond drilling technique is discussed. Using a combination of reinforced concrete and Darney sandstone, the Grand Cascade comprises a series of 30 weirs with 7,260 gallons/min of water tumbling down it at peak flow. The holes were drilled at a 45° angle along a curved wall and the configuration of each set of three holes was aligned in exact symmetry, so that the water is thrown at a precise angle for the jets to meet in the middle.

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