The failure of collar connection thread is one of the prime drill tool failures.

石油钻铤螺纹联接失效是钻具失效的主要类型。

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The statistics of drill tool failures from the oil field shows that failures of the stabilizer are large part of failures of drill tool failures.

现场钻具失效资料的统计分析表明，在钻具失效事故中稳定器失效占有很大一部分。

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When problems occur, the tool is best placed at the point of failures to assist in data collection.

当出现问题时，最好将该工具安装在故障点以协助收集数据。

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But even on purely economic grounds, death taxes are spectacular failures as revenue raisers or a tool of income redistribution.

WSJ: Review & Outlook: Death Tax Defying