技术专业人员对牙轮钻头失效的分析表明,轴承的破坏是牙轮钻头破坏的主要原因。进一步的研究表明,钻井过程中的过高温度是使轴承润滑的性能遭到破坏,或使那些无润滑脂的轴承装置遭到损坏的重要原因之一。这一分析证明了良好的润滑和合适的工作温度范围是延长钻头轴承寿命的关键因素。 An analysis of the failure of a roller cone bit by a technical professional shows that the failure of the bearing is the main cause of roller cone bit failure. Further research shows that the over-temperature during drilling is one of the important reasons that the performance of bearing lubrication is damaged or the bearing devices without grease are damaged. This analysis demonstrates that good lubrication and a suitable operating temperature range are key factors in extending the life of drill bits.