在钻井现场,因种种原因,焊工不得不对折断的钻杆进行手工爆接,焊接这类钻具,需要比较严格的工艺措施,这在野外是难以办到的,然而,最使焊工头痛的是;常因钻杆存在剩磁,产生焊接磁偏吹。剩磁的来源,大致有两种情况:一是生产厂用强力电磁铁起吊钻杆,二是检验时采用漏磁探伤。在焊接时造成磁偏吹的主要原 At the drilling site, due to various reasons, the welder had to hand-break the broken drill pipe. To weld such drill tools requires more stringent process measures which are difficult to achieve in the field. However, ; Often due to existence of remanence drill pipe, welding magnetic partial blow. The source of residual magnetism, there are roughly two cases: First, manufacturers use powerful electromagnet lifting drill pipe, the second is the use of magnetic flux leakage testing. Magnetic welding caused by the main reason for the partial blow