[1]赵金兰,李京川,王 康,等.某G105钻杆管体刺穿失效原因分析[J].焊管,2020,43(11):36-40,52.
 ZHAO Jinlan,LI Jingchuan,WANG Kang,et al.Causes Analysis of a G105 Drill Pipe Body Piecing Failure[J].,2020,43(11):36-40,52.
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某G105钻杆管体刺穿失效原因分析()
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
43
期数:
2020年第11期
页码:
36-40,52
栏目:
应用与开发
出版日期:
2020-11-28

文章信息/Info

Title:
Causes Analysis of a G105 Drill Pipe Body Piecing Failure
作者:
赵金兰1李京川1王 康2瞿婷婷1仝 柯1
1. 中国石油集团石油管工程技术研究院,西安 710077;
2. 西安杰恩特机电科技有限公司,西安 710077
Author(s):
ZHAO Jinlan1 LI Jingchuan1 WANG Kang2 QU Tingting1 TONG Ke1
1. CNPC Tubular Goods Research Institute, Xi’an 710077, China;
2. Xi’an Jiente Electromechanical Technology Co., Ltd., Xi’an 710077, China
关键词:
腐蚀疲劳失效钻杆
Keywords:
corrosionfatiguefailuredrill pipe
文献标志码:
A
摘要:
针对某井G105钻杆管体刺穿失效问题,通过化学成分分析、力学性能测试、金相检测、扫描电镜(SEM)等手段,对该失效钻杆管体刺穿失效原因进行综合分析。结果表明,钻杆管体刺穿的主要原因是在交变载荷作用和Cl-作用下,钻杆外表面腐蚀坑底的裂纹萌生并加速扩展,当裂纹扩展穿透整个壁厚时,高压钻井液从内孔刺出,形成冲蚀,导致管体刺穿失效。最后指出,应加强对同批钻杆的无损探伤检验,避免带腐蚀疲劳微裂纹的钻杆下井使用。
Abstract:
Aiming at the problem of piercing failure of G105 drill pipe body in a well, the causes of piercing failure of G105 drill pipe were analyzed by means of the chemical composition analysis, mechanical property test, metallographic examination and scanning electron microscope (SEM). The results show that the main reason of drill pipe piercing is the crack initiation and accelerated propagation of corrosion pit bottom on the outer surface of drill pipe under the alternating load and Cl-. When the crack propagates through the whole wall thickness, the high-pressure drilling fluid will pierce out of the inner hole and form erosion, leading to the failure of pipe piercing. Finally, it is pointed out that the nondestructive testing of the same batch of drill pipes should be strengthened to avoid the drill pipes with corrosion fatigue microcracks.

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备注/Memo

备注/Memo:
收稿日期:2020-05-24
修改返回日期:2020-07-23
作者简介:赵金兰(1982—),女,工程师,硕士,主要从事石油管道技术支持工作。
更新日期/Last Update: 2021-01-14