连续管损伤磁记忆检测信号定量研究  

Quantitative Study on Magnetic Memory Detection Signal for Coiled Tubing Damage

作　　者：倪金禄 樊建春[1] 胡治斌 吴家风 高维骏 

机构地区：[1]中国石油大学(北京)机械与储运工程学院

出　　处：《石油机械》2017年第12期88-91,共4页China Petroleum Machinery

基　　金：中国石油大学(北京)优秀青年教师研究项目"巨磁阻效应磁记忆检测技术基础研究"(ZX20150260)

摘　　要：连续管在恶劣工况下作业时,容易造成管壁减薄,从而引发安全事故。为此,采用磁记忆检测技术开展连续管刻伤试验。对连续管进行等宽不同深度的环形刻伤,根据试验数据对磁记忆信号特征参量与刻伤深度的定量关系进行拟合并得到相应公式。引入Fisher判别思想对刻伤进行多参数综合评价并建立判别准则。分析结果表明:磁记忆检测信号的梯度峰峰值和梯度波峰值与刻伤深度呈线性递增关系;梯度峰面积与刻伤深度呈指数递增关系,而梯度峰面积对数值与刻伤深度呈线性递增关系。研究成果为磁记忆检测技术应用于连续管损伤检测提供了理论支持。Coiled tubing operation in harsh conditions are prone to cause wall thinning, which led to safety accidents. In view of this, the magnetic memory detection technology has been used to cany out coiled tubing etch-ing test. Ring etching with the same widths but different depths have been done on the coiled tubing. Based on the experimental data, the quantitative relationship between the characteristic parameters of the magnetic memory signal and the etch depth has been fitted and the corresponding formula has been obtained. Fisher discriminant thought was introduced to carry on multi-parameter comprehensive evaluation and establish discriminant criterion for the ring etching. The results show that the gradient peak-to-peak value and gradient peak value of the magnetic memory de-tection signal are linearly increasing with the etching depth. The gradient peak area is exponentially increasing with the etching depth. The gradient peak area logarithmic value is linearly increasing with the etching depth. The re-search results could provide theoretical support for the application of magnetic memory detection technology to coiled tubing damage detection.

关 键 词：连续管 刻伤深度 磁记忆特征参量 Fisher判别思想 

分 类 号：TE925[石油与天然气工程—石油机械设备]