某S135钻杆腐蚀穿孔失效分析  

作　　者：赵金[1] 杨碧玉[1] 崔顺贤[1] 袁中华[1] 廖凌[1] 

机构地区：[1]中国石化西南油气分公司,四川德阳618000

出　　处：《科技创新导报》2011年第15期33-34,共2页Science and Technology Innovation Herald

摘　　要：通过宏观形貌分析、力学性能测试、金相显微组织和微观形貌及物相分析,并结合钻杆的使用状况,对某S135钻杆管体穿孔失效原因进行分析。结果表明,钻杆内加厚过渡区及紧邻的管体部分内壁的一侧集中分布着大量的深腐蚀坑,腐蚀坑主要是由于氧腐蚀形成的,钻杆的穿孔失效属于氧腐蚀失效。The failure reason of S135 drill pipe was studied through mechanical properties testing, optical morphologies and fracture analysis. Results show that mainly reason of failure is severe oxygen corrosion on one side inner face of drilling pipe. Under the effect of alternating stresses, the cracks are first initiated in the corrosion pit of upsetting transitional band and expand quickly. Drill pipe＇s washout failure belongs to early oxygen corrosion failure.

关 键 词：钻杆 穿孔 失效分析 氧腐蚀 

分 类 号：TE921[石油与天然气工程—石油机械设备]