钻杆多通道磁记忆检测信号的多方向梯度处理方法  

Multi-direction Gradient Processing Method for Multi-channel Magnetic Memory Testing Signal of Drill Pipe

作　　者：辛康 樊建春[1] 祖强[2] 明传中[2] 杨坤[1] 曾浩天 XIN Kang1 , FAN Jianchun1 , ZU Qiang2 , MING Chuanzhong2 , YANG Kun1 , ZENG Haotian1(1.Mechanical and Transportation Engineering College, China university of Petroleum （Beijing）, Beijing 102249, China; 2.Tarim Oilfield Branch, PetroChina Company Limited, Korla 841000, China)

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 [2]中国石油天然气股份有限公司塔里木油田分公司,库尔勒841000

出　　处：《无损检测》2018年第3期1-4,共4页Nondestructive Testing

摘　　要：针对单从检测方向求解磁记忆信号梯度容易造成与检测方向同向的应力集中部位漏检的问题,应用多通道磁记忆检测仪检测了油田钻杆的应力及损伤状态,探讨了在对多通道磁记忆信号的切向分量求梯度时,从切向分量方向与法向分量方向进行联合梯度求解的方法。在钻杆的多通道磁记忆检测信号上进行了两种检测方法的对比,结果表明,从两个方向进行联合梯度求解的方法比只从检测方向求梯度效果更好。提出的方法对促进磁记忆检测技术用于钻杆检测,以及减少钻杆事故具有重要意义。The stress and damage state of drill pipe in oilfield are detected by multi-channel magnetic memory tester.In order to overcome the disadvantage that gradient from single direction is easy to cause stress concentration region of the same direction as with the testing undetected,this paper proposed a method that combined the gradients of the testing direction and its vertical direction when one aimed to work out the gradient of the tangential component of multi-channel magnetic memory signal.It is proved that this method is better than gradient only from testing direction by the comparison of two methods in multi channel drill pipe magnetic memory testing signals.The method proposed in this paper is of great significance to promote the application of magnetic memory testing technology in the testing of drill pipe and reduce the accident of drill pipe.

关 键 词：磁记忆检测 梯度 信号处理 多通道 

分 类 号：TG115.28[金属学及工艺—物理冶金]