特殊扣接箍端面承载能力分析

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中图分类号：TE931.2 文献标识码：B 文章编号：1003-0514（2025）04-0059-04

Analysis of the load-bearing capacity of the couplingend face of premium connection

WuDan，Hu Zhili（HengyangValin Steel TubeCo.，Ltd.，Hengyang 421OOO，Hunan，China）

Abstract：Theoperational requirements forlifting clampoperations at theoilfield sitedemandthatthecoupling end faces have ahigh load-bearing capacity，as their performance directly impactsthe safetyof casing string deployment and the eficiencyofoperations.Consequently，oilfield usersplacea strong emphasis onthe load-bearingcapacityof the coupling endfaces.Thestudyfocusesonaddresing the stressdistribution patterns，failure critical conditions，andtheeffcts on end face deformation during the lifting clamp operations. This paper selects the 273.05×13.8 4mm 140HC premium connection casing as the research subjectand employs finite element simulation techniques to systematicallanalyze thestress and strain distribution，localized stressconcentration phenomena，andoverall deformation paternsof the coupling end faces underlifting clampoperationalconditions.Theresultsdemonstrate that，ataratedloadof75Otons，noplasticdeformation orstructuralfailureoccurs inthecoupling endfaces，whiletheendfacethreadparametersremainstable.Theultimateloadbearingcapacityof thethreadedendfaceisdeterminedtobe62tons，withfailure modes primarilycharacterizedbylocalized yielding andexcessivecontact stress.Thispaper providetheoretical and technical references foroilfieldsiteconstruction operations.

Key words：premium connection； lift sub operating；coupling face；bearing capacity；FEA

1背景

随着油气资源开发向深井、超深井及复杂地质条件区域延伸，特殊扣套管因其高连接强度、优异密封性能及抗压缩能力，成为油田作业中的关键部件。（剩余3536字）