Reasonable solution to the problem of iron base spray welding layer falling off of drill pipe

ZHANG Tiejun; HE Xu

doi:10.7512/j.issn.1001-2303.2021.11.27

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Reasonable solution to the problem of iron base spray welding layer falling off of drill pipe
Vol. 51, Issue 11, Pages: 141-144(2021)
Published：2021
DOI： 10.7512/j.issn.1001-2303.2021.11.27
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DOI：

ZHANG Tiejun, HE Xu. Reasonable solution to the problem of iron base spray welding layer falling off of drill pipe[J]. Eletric Welding Machine2021, 51(11): 141-144. DOI： 10.7512/j.issn.1001-2303.2021.11.27.

摘要

文中对铁基喷焊钻杆耐磨带工艺脱落问题进行研究

分析表明:喷焊工艺缺陷、未焊透、结合力差、套管与钻杆间隙小是造成钻杆接头铁基熔敷层脱落的主要原因。针对脱落原因

文中从喷焊工艺和喷焊材料两方面对铁基熔覆层脱落问题进行分析解决。最终将相同成分的铁基熔覆合金制备成药芯焊丝

采用MAG(熔化极活性气体保护电弧焊)的方式有效解决铁基熔覆层脱落的问题

减少卡钻事故降低成本。

Abstract

Research has been conducted on the problem of iron-based spray-welded drill pipe wear-resistant banding process.The analysis shows that the main reasons for the falling off of ironbased spray welding deposited layer of drill pipe joint are spray welding process defects

incomplete penetration

poor adhesion and small gap. In view of the causes of falling off

the problem of falling off of iron-based spray welding layer is analyzed and solved from two aspects of welding process and welding materials. Finally

the iron-based spray welding alloy with the same composition is prepared into flux cored wire

and MAG（melting electrode active gas shielded arc welding） is used to completely solve the problem of falling off of iron-based spray welding layer

reduce drilling sticking accidents and reduce costs.