辽河油田集输管道外防腐层检测技术

阐述了多频管中电流法(PCM)的检测原理,利用英国雷迪公司的DM内外业一体化型管道防腐层检测仪,对辽河油田曙光采油厂内曙五联至首站、曙一联至曙五联和曙四联至首站三条集输管道进行了外防腐层检测,三条管道防腐层劣级和差级分别占全部防腐层的50.2%、51.8%和42.9%。对疑似漏点开挖验证与检测结果吻合。单纯将PCM检测方法用于油田地下管道的检测有一定的局限性,与其他检测手段结合更有利于提高检测结果的准确度。

The Detection Technique of Surface Anti Corrosion Layer for Gathering Pipeline in Liaohe Oilfields

By introducing PCM in the multi-frequency principles and using DM produced by Radiodetection company,the article showed respectively the detection results of the anticorrosion layers from Shuwulian to first station,from Shuyilian to Shuwulian and from Shusilian to first station gathering pipelines in Shuguang oil production plant in Liaohe oilfield.The inferior and poor level of the three pipelines was accounted for 50.2%,51.8%and 42.9%respectively on all the anticorrosion layers.The detect results and the verification of suspected leaks were consistent.There were certain limitations when PCM was used only to detect underground pipes.If it was combinated with other detection means,the results would be more accurate.