油管横纵向缺陷漏磁检测磁化装置参数设计

Parameter Design for the Magnetic Flux Leakage Detection and Magnetization Device of Tubing Transverse Longitudinal Defects

油管是采油工程中的重要构件之一,其工作环境恶劣,工作状态复杂,将导致油管缺陷的产生。对油管缺陷检测的核心是对缺陷油管有效的磁化。本研究基于对横向缺陷直流线圈磁化,纵向缺陷永磁磁化的靶向磁化方式,通过有限元仿真分析不同装置结构下磁化效果,最终优选出最佳装置参数组合的磁化模型:双线圈附加聚磁板安匝数为2000的直流磁化,线圈间距为550 mm,线圈与油管间距可调的横向缺陷磁化模型;半外环形衔铁,永磁体长50 mm宽50 mm高50 mm,磁极间距可调的纵向缺陷磁化模型。为下一步磁化装置的设计提供理论依据。

Tubing is one of the important components of the oil production engineering, its bad working environment and com-plex working condition may cause the tubing defects. The core of pipeline defect detection is to effectively magnetize the defec-tive tubing. In this study, based on the targeted magnetization way which adopts the DC coil magnetization to the transversedefects, while the permanent magnet magnetization to the longitudinal defects, and through the finite element simulation analy-sis of the magnetization effects under different device structures, the magnetization model with best device parameters combina-tion is ultimately selected： the magnetization model with double coil attached poly magnetic plate ampere turn to 2000 DC mag-netization to the transverse defects, the coil spacing is 550 mm and the spacing between coil and pipe is adjustable; the mag-netization model with half outer ring armature to the longitudinal defects, the permanent magnet is 50mm long, 50mm wide and50mm high, the pole spacing is adjustable. Thus it would provide theoretical basis for the following design of the magnetizingdevices.