摘要
双相不锈钢连续管具有高塑性、高韧性和高耐腐蚀性,在海上和陆上作业中得到了广泛应用。为了解决现有漏磁检测技术对磁导率较低的双相不锈钢连续管在线检测时无法实现饱和磁化的问题,提出了一种涡流检测方法,设计使用差分曲面探头检测连续管缺陷,阵列探头交替放置于连续管表面,可360°全覆盖检测直径小于50.8 mm的连续管。结果表明,该方法可以检测纵向和轴向缺陷,克服了漏磁检测方法只能检测碳钢中单向缺陷的局限性。同时,针对理论低周疲劳模型无法精准预测含缺陷连续管疲劳寿命的问题,提出基于检测数据的疲劳预测模型,提高了连续管疲劳预测的可靠性。通过建立周向涡流检测模型,可实现连续管疲劳寿命的精准预测,从而提高产品利用率,节约成本,为连续管的高效利用提供技术支撑。
Duplex stainless steel coiled tubing has been widely used in offshore and onshore operations because of its high plasticity,toughness and corrosion resistance.In order to solve the problem that existing magnetic leakage detection technology cannot achieve saturation magnetization during online testing of dual phase stainless steel coiled tubing with low permeability,an eddy current testing method is proposed to detect the defects of coiled tubing using a differential surface probe.The array probes are alternately placed on the surface of the coiled tubing,and can detect the coiled tubing with a diameter of less than 50.8 mm with full coverage of 360°.The experiment shows that this method can detect longitudinal and axial defects,overcoming the limitation that the magnetic flux leakage detection method can only detect one⁃way defects in carbon steel.In view of the problem that the theoretical low⁃cycle fatigue model cannot accurately predict the fatigue time of coiled tubing,a fatigue predictionmodel based on detection data is established and the reliability of coiled tubing fatigue prediction is improved.By establishing a circumferential eddy current testing model,precise prediction of the fatigue life of coiled tubing can be achieved,thereby improving product utilization,saving costs,and providing technical support for the efficient utilization of coiled tubing.
作者
周兆明
李波
张欢
ZHOU Zhaoming;LI Bo;ZHANG Huan(School of Mechanical and Electrical Engineering,Southwest Petroleum University,Chengdu 610500,China;China National Aviation Oil Group Guizhou Petroleum Co.,Ltd.,Guiyang 550005,China)
出处
《焊管》
2023年第7期76-82,共7页
Welded Pipe and Tube
基金
国家自然科学基金“极端条件下气井管柱耦联振动力学行为与控制基础理论研究”(项目编号51974271)。
关键词
连续管
疲劳寿命预测
涡流检测
双相不锈钢
coiled tubing
fatigue life prediction
eddy current testing
duplex stainless steel
