基于磁记忆检测的钻具接头的上卸扣试验研究  

Test Study on Drilling Tool Joint's Break-in/Break-out Based on Magnetic Memory Testing

作　　者：程彩霞[1] 樊建春[1] 胡治斌 张仁庆[1] 

机构地区：[1]中国石油大学(北京),机械与储运工程学院,北京102249

出　　处：《石油管材与仪器》2017年第6期37-40,共4页Petroleum Tubular Goods & Instruments

摘　　要：石油钻井作业中,钻具接头螺纹失效事故是钻具失效的重要类型。为了研究不同扣型的钻具接头的抗疲劳能力,采用常见的四种扣型钻具接头(4(1/2)REG、NC31、NC38、NC40)作为试样,对其进行了反复上卸扣试验。并利用磁记忆检测技术对试样接头进行检测,通过对信号的分析与处理,得出以下结论:磁记忆信号的最大峰峰值|V_(PP)|_(max)和最大梯度值|K|_(max)是可以表征钻具损伤的敏感特征参量。钻具接头4(1/2)REG、NC31、NC38、NC40分别在上卸扣试验次数为90次、50次、30次、60次时,特征参数发生显著变化。四种接头的抗疲劳能力的强弱依次为4(1/2)REG、NC40、NC31、NC38。In the oil drilling operation, the accident of drilling tool joint thread failure is an important type of tool failure. In order to studythe anti-fatigue ability of the different drilling tool joints, four kinds of tool joints （4 X R E G , NC31, NC38, REG NC40） are selected to dothe break-in/break-out tests. The metal magnetic memory testing technology is used to detect the damage. The analysis and processing ofmagnetic memory signal show that the maximum peak value and the maximum gradient value of the magnetic memory signal can be used tocharacterize the sensitivity of the drilling tool damage. The characteristic value of the tool joint of 4 % REG, NC31, NC38 and NC40 increasesignificantly in the break-in/break-out test time at 90th , 50th , 30th , 60th respectively. The four kinds of tool joints sorted by anti-fatigueability are 4 K R E G , NC40, NG31, and NC38.

关 键 词：钻具接头 上卸扣试验 磁记忆检测 抗疲劳能力 

分 类 号：TE921[石油与天然气工程—石油机械设备]