特高压井口法兰设计及复合载荷下密封性能

打开文本图片集

中图分类号： TH931 文献标志码：A

Abstract：In viewof thecurrent lack ofdesign guidance for175 MPaUHP（ultra-high pressure）wellhead equipment，the flange structuredimensions with diameters of78mmand18O mmunderworking internal pressureof175MPa weredeterminedbyrefering to the methodfordetermining flange design parameters inAPI6Astandard.Thesealing performanceof the non-standard flange designed wasanalyzed underrated working internal pressreand1.5timesrated working internal pressure，andthe impactof diferent bossizesof the78-175flangeonflange performance wascomparedandanalyzed.Refering totheleakagecurveof thecompositeloadintheAPITRAF2 standard，theload-bearing capacityof the78-175and 180-175 non-standardflanges wascalculated basedonthecriterionof leakage，and multipleworking conditionson the line set wereverifiedandanalyzed，supplementingand improvingthedesign methodof175MPaflangesealing forUHPwellhead athome andabroad.Theresultsshowthatthe175MPaUHPflangedesignedhas goodsealing reliability，andthecorrectness of thedesignisverifiedbysealing testsand gasket deformation measurements.Theinfluenceofcompositeloadon flange sealing performance based on leakage criterion is further revealed.

Keywords： ultra-high pressure wellhead; flange;seal;composite loads; leakage curve;gasket ring；deformation

随着油气田勘探开发深度不断增加，石油行业 迫切需要通过压力等级更高的井口装备来实现有交的油气开采[1]。（剩余12520字）