摘要
为分析Φ244.48 mm×10.03 mm规格N80钢级长圆螺纹套管螺纹黏结原因,检测了该批套管螺纹接头加工质量,检验了套管的材料特性,通过套管上卸扣试验,对比不同接箍表面处理特性等。结果证明:套管材料碳含量较低、硬度低、接箍表面磷化层较薄、附着力差是造成此批套管产品抗螺纹黏结性能较差的主要原因。
The causes for thread galling of the Ф244.48 mmxl0.03 mm N80 long-round thread casings as used in a certain oil field are investigated by means of inspecting the thread connection processing quality and material characteristics of all the trouble-ridden casings, and comparing the surface processing characteristics of different couplings by means of the make ＆ break test. As a result, it is identified that major elements responsible for the poor anti-galling performance of the very lot of casings include rather low carbon content and hardness of the casing material, and over-thin phosphate coating of the coupling surface that leads to poor adhesion of itself.
出处
《钢管》
CAS
2015年第3期55-58,共4页
Steel Pipe
关键词
套管
N80钢级
长圆螺纹
螺纹黏结
原因分析
上卸扣试验
casing
St. G NSO
long-round thread
thread galling
cause investigation
make ＆ break test
