本节难点：钻柱失效机理分析。
Section difficulty:Mechanism analysis of column out of work.
带扶正器下部钻柱组合的失效是钻柱失效的一种很重要的类型。
The failure of BHA with stabilizers is important among drilling string failures.
开展油田钻柱失效分析与预防对提高钻井速度、降低钻井成本及井下安全钻进具有重要意义。
It is very important for improving drilling rate, reducing drilling cost and safety drilling to carry out drill stem failure analysis and prevention.
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