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首页> 外文期刊>The Journal of Strain Analysis for Engineering Design >Fatigue life improvement of threaded connections by cold rolling
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Fatigue life improvement of threaded connections by cold rolling

机译：冷轧可改善螺纹连接的疲劳寿命

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摘要

Failures in drillstring threaded connections continue to afflict the oil industry at a cost of millions of dollars per year. In an attempt to reduce these failures the industry has generally adopted the fatigue-life-enhancing technique of cold rolling the threaded connections which act as stress concentrations. However, this beneficial process is only specified as optional in the industry standards, and where it is performed there is very little detail provided about this important process. This paper describes full-scale fatigue tests that investigate the cold-rolling process. From the development of cold-rolling equipment and the gathering of fatigue experimental data, several key factors have been identified that influence the operational lifetime of drillstring threaded connections.
机译：钻柱螺纹连接的故障继续困扰着石油工业，每年的损失达数百万美元。为了减少这些故障，工业界通常采用增强疲劳寿命的技术，即冷轧螺纹连接，这是应力集中。但是，该有益过程仅在行业标准中指定为可选，并且在执行该过程时，很少提供有关此重要过程的详细信息。本文介绍了研究冷轧过程的全面疲劳试验。从冷轧设备的开发和疲劳试验数据的收集中，已经确定了影响钻柱螺纹连接使用寿命的几个关键因素。

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