张永强,李辉,王珂,刘杰,尹志福,朱世东.油井管杆偏磨失效分析[J].表面技术,2016,45(8):87-91.
ZHANG Yong-qiang,LI Hui,WANG Ke,LIU Jie,YIN Zhi-fu,ZHU Shi-dong.Eccentric Wear Failure Analysis of Oil Well Tubing and Sucker Rod[J].Surface Technology,2016,45(8):87-91
油井管杆偏磨失效分析
Eccentric Wear Failure Analysis of Oil Well Tubing and Sucker Rod
投稿时间:2016-03-17  修订日期:2016-08-20
DOI:10.16490/j.cnki.issn.1001-3660.2016.08.015
中文关键词:  抽油杆  油管  偏磨  腐蚀  失效分析  J值
英文关键词:sucker rod  tubing  eccentric wear  corrosion  failure analysis  J values
基金项目:
作者单位
张永强 陕西延长石油(集团)有限责任公司研究院,西安 710075 
李辉 陕西延长石油(集团)有限责任公司研究院,西安 710075 
王珂 陕西延长石油(集团)有限责任公司研究院,西安 710075 
刘杰 陕西延长石油(集团)有限责任公司研究院,西安 710075 
尹志福 陕西延长石油(集团)有限责任公司研究院,西安 710075 
朱世东 陕西延长石油(集团)有限责任公司研究院,西安 710075 
AuthorInstitution
ZHANG Yong-qiang Research Institute of Shaanxi Yanchang Petroleum (Group) Co., Ltd, Xi′an 710075, China 
LI Hui Research Institute of Shaanxi Yanchang Petroleum (Group) Co., Ltd, Xi′an 710075, China 
WANG Ke Research Institute of Shaanxi Yanchang Petroleum (Group) Co., Ltd, Xi′an 710075, China 
LIU Jie Research Institute of Shaanxi Yanchang Petroleum (Group) Co., Ltd, Xi′an 710075, China 
YIN Zhi-fu Research Institute of Shaanxi Yanchang Petroleum (Group) Co., Ltd, Xi′an 710075, China 
ZHU Shi-dong Research Institute of Shaanxi Yanchang Petroleum (Group) Co., Ltd, Xi′an 710075, China 
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中文摘要:
      目的 分析油井管杆失效原因。方法 通过对抽油杆和油管失效样品的宏观形貌进行观察,分析样品的化学成分、显微组织和微观断口形貌,测试抽油杆抗拉强度、下屈服强度、伸长率、断面收缩率,同时测试油管抗拉性能、屈服强度、伸长率和冲击功,并结合油井所在区块的工况条件、产出液性质、腐蚀挂片测试数据和油管螺纹连接结构,对油井管杆失效原因进行了分析。结果 抽油杆的抗拉强度为910 MPa、下屈服强度为845 MPa,伸长率为17%,断面收缩率为67.5%,符合SY/T 5029—2013《抽油杆》行业标准要求,其金相组织正常,为珠光体+铁素体。油管化学成分中的P质量分数为0.015%,S质量分数为0.011%,油管的抗拉强度为725 MPa,屈服强度为445 MPa,伸长率为26.0%,冲击功为27 J,符合API Spec 5CT《油管和套管规范》要求。其金相组织正常,为铁素体+珠光体。结论 抽油杆和油管失效是偏磨与腐蚀共同作用的结果,螺纹连接处的J值凹槽是造成油井管杆偏磨损坏的重要原因,可以通过控制油管J值为0,变冲击磨损为滑动磨损,从而减缓油井管杆偏磨损坏。
英文摘要:
      Objective In order to find out the failure cause of oil well tubing and sucker rod. Methods The macroscopic morphology of failure sample of tubing and sucker rod was observed. Chemical composition, microstructure and microcosmic fracture surface were analyzed. Tensile strength, lower yield strength, elongation and reduction of area of sucker rod were tested. Meanwhile, tensile strength, yield strength, elongation and impact energy were tested. The failure reasons were analyzed according to the results of laboratory tests combined with working condition, properties of the output liquid, corrosion coupon testing data and tubing thread connection structure. Results The tensile strength of sucker rod was 910 MPa, lower yield strength 845 MPa, elongation 17%, and reduction of area 67.5%. All the test results were in line with SY/T 5029—2013 Sucker Rods. The microstructure pearlite+ferrite was normal. The phosphorus and sulfur contents were 0.015% and 0.011% respectively, tensile strength 725 MPa, yield strength 445 MPa, elongation 26.0% and impact energy 27 J. All the test results were in line with API Spec 5CT Specification for Casing and Tubing. The microstructure pearlite+ferrite was normal. Conclusion The tubing and sucker rod failure are caused by eccentric wear and corrosion. J value groove is an important reason of the tubing and sucker rod failure. We can slow down eccentric wear by controlling the J value at 0 and changing from impact wear to sliding wear.
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