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时间:2019-02-14
《浅析常规液压钳钳牙对防腐蚀合金套管磨损破坏行为》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、2016年2月润滑与密封Feb.2016第41卷第2期LUBRICATIONENGINEERINGVo1.4lNo.2DOI:10.3969/j.issn.0254—0150.2016.02.023常规液压钳钳牙对防腐蚀合金套管磨损破坏行为分析徐建宁周欣(西安石油大学机械工程学院陕西西安710065)摘要:目前油田普遍采用的防腐蚀合金(CRA)套管材质较软。工作时常规动力钳易破坏管两端处的表面镀锌层.加速硫化氢对套管的腐蚀。为减轻液压管钳对套管损伤,减缓硫化氢对套管的腐蚀,基于普通液压管钳工作原理.建立钳121力学模型,确定影响管钳加紧的具体因素。根据摩
2、擦疲劳学理论,分析钳牙对套管的磨损成因和磨损过程,通过钳牙与油管上卸扣实验发现,磨损与接触区域、循环次数、相互接触材料等因素有明显关系。通过分析接触区域的应力应变,表明影响钳牙对套管的磨损的主要因素是摩擦因数、接触载荷。并且摩擦因数对拉伸应变的影响更加明显。关键词:硫化氢腐蚀;套管;液压管钳;钳牙;摩擦损伤中图分类号:TH117.1文献标志码:B文章编号:0254—0150(2016)02—116-05BehaviorAnalysisofCorrosionResistantAlloysCasingWearDamagebyClampJawsofConven
3、tionalHydraulicTongsXUJianningZH0UXin(SchoolofMechanicalEngineering,Xi’anShiyouUniversity,Xi’anShaanxi710065,China)Abstract:Thegalvanizedlayeronbothendsofthecorrosionresistantalloys(CRA)casingsu~aceiseasilytobedam—agedbytheconventionalpowertongsduringworkingforthematerialofCRAcas
4、ingusuallyusedintheoilfieldisrelative—lysoft,whichwillacceleratethehydrogensulfidecorosionofthecasing.Inordertoreducingthedamageofhydraulictongsoncasing,andslowdownthecorosionofhydrogensulfideoncasing,basedontheworkingprincipleoftheconventionalhydraulicpowertongs,themechanicsmode
5、lofjawswassetup,andthespecificfactorsaffectingtongstighteningwerede—termined.Accordingtothetribologicaltheoryoffatigue,causesandprocessofwearofthecasingbyjawswereanalyzed.Throughtheexperimentsofscrew—on-ofbythejawsonoilpipe,theresultshowsthatwearhasobviousrelationshipwithcontacta
6、rea,numberofcycles,themutualcontactmaterialsandotherfactors.Throughthestressandstrainanalysisofcon—tactarea,itisshownthatfrictioncoefficientandcontactloadarethemajorfactorsinfluencingthecasingwearbyjaws,andthefrictioncoefficienthasmoreobviousinnuenceontensilestrain.Keywords:hydro
7、gensulfidecorosion;casing;hydraulictongs;jaws;frictiondamage我国油田的开发目前已进入中后期,为应对硫化本文作者基于常规液压管钳结构,研究其对氢严重腐蚀套管的问题,油田已陆续将处在腐蚀区域CRA套管的磨损成因和磨损过程,利用摩擦疲劳学的普通套管更换为合金套管和双防硫套管。防腐蚀的理论。分析其力学行为,为减轻液压管钳对套管损合金套管(CRA)材质较软,油井上在使用常规动伤,减缓硫化氢对套管的腐蚀提供理论依据。力钳拆装管子的过程中,套管两端处被啃上深深的啮1管钳工作原理痕,表面镀锌层被完全破坏.加速硫
8、化氢对套管的腐如图1所示,液压钳在卸扣的过程中.当开始上蚀¨],缩短套管的使用寿
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