[1]何文江,雷 博,赵凯峰,等.30CrMoA HL级抽油杆断裂失效原因分析[J].焊管,2021,44(4):26-31.[doi:10.19291/j.cnki.1001-3938.2021.04.006]
 HE Wenjiang,LEI Bo,ZHAO Kaifeng,et al.Failure Analysis of 30CrMoA HL Grade Sucker Rod Fracture[J].,2021,44(4):26-31.[doi:10.19291/j.cnki.1001-3938.2021.04.006]
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30CrMoA HL级抽油杆断裂失效原因分析()
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
第44卷
期数:
2021年第4期
页码:
26-31
栏目:
失效分析
出版日期:
2021-04-28

文章信息/Info

Title:
Failure Analysis of 30CrMoA HL Grade Sucker Rod Fracture
文章编号:
10.19291/j.cnki.1001-3938.2021.04.006
作者:
何文江雷 博赵凯峰陈作明周 杰
1. 长庆油田分公司采油二厂工艺研究所,甘肃 庆阳 745100;
2. 西安石油大学 材料科学与工程学院,西安 710065
Author(s):
HE Wenjiang LEI Bo ZHAO Kaifeng CHEN Zuoming ZHOU Jie
1. Research Institute of Oil Gas Technology, No.2 Oil Production Plant of PetroChina Changqing Oilfield Company, Qingyang 745100, Gansu, China;
2. School of Material Science and Engineering, Xi’an Shiyou University, Xi’an 710065, China
关键词:
抽油杆断裂失效分析腐蚀疲劳
Keywords:
sucker rod fracture failure analysis corrosion fatigue
分类号:
TG162.75
DOI:
10.19291/j.cnki.1001-3938.2021.04.006
文献标志码:
B
摘要:
为研究30CrMoA HL级抽油杆断裂失效原因,通过理化性能试验、金相组织分析等手段,对30CrMoA HL级抽油杆进行失效分析。结果显示,断口位于抽油杆端部镦锻过渡区圆弧消失前沿30 mm左右,抽油杆表面发生严重局部腐蚀,所有裂纹均起源于表面腐蚀坑底部;通过有限元模拟其服役过程,发现其断裂应力高达904 MPa,接近抽油杆的屈服强度。结果表明,腐蚀疲劳是导致抽油杆断裂的主要原因,该区域易发生截面突变从而导致应力集中。抽油杆的结构特点、高应力交变载荷以及腐蚀介质等因素共同作用导致抽油杆发生腐蚀疲劳断裂。
Abstract:
In order to study the fracture failure reason of 30CrMoA HL grade sucker rod, physical and chemical properties, metallographic structure, were used to analyze 30 CrMoA HL grade sucker rod. The results show that the fracture was located about 30 mm from the vanishing edge of the arc in the upsetting forging transition zone of the sucker rod end. Serious local corrosion occurs on the surface of sucker rod, and all cracks originate from the bottom of surface corrosion pit. Finite element simulated sucker rod fracture stress level in the process of 904 MPa, close to the sucker rod yield strength. Serious local corrosion occurred on the sucker rod surface. The results show that corrosion fatigue is the main cause of sucker rod fracture. There is a sudden change of cross section in this area, which leads to stress concentration. The structural characteristics of sucker rod, high stress alternating load and corrosive medium together lead to corrosion fatigue fracture of sucker rod.

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备注/Memo

备注/Memo:
收稿日期: 2020-12-07
作者简介:何文江(1977—), 男, 油气田开发工程师,主要从事采油工艺管理与技术研究工作。
更新日期/Last Update: 2021-05-18