油套管特殊螺紋連接密封性能試驗(yàn)研究

Experimental Research on Sealing Ability of Oil Tubing/Casing Premium Connection

摘要: 基于ISO 13679 ∶2002 標(biāo)準(zhǔn)，通過對某型特殊螺紋接頭進(jìn)行有限元仿真分析與實(shí)物評價試驗(yàn)，評價該特殊螺紋接頭的密封性能。結(jié)果表明：該特殊螺紋接頭在上卸扣及載荷包絡(luò)線試驗(yàn)有限元分析過程中，其等效應(yīng)力分布比較均勻，未超過材料的屈服強(qiáng)度，極限試樣在實(shí)物評價過程中未出現(xiàn)結(jié)構(gòu)失效及泄漏現(xiàn)象，證明該特殊螺紋接頭在復(fù)合載荷工況下可以保持良好的連接強(qiáng)度和可靠的氣密封性能。

Abstract: As per ISO 13679 ∶2002,the EF simulation analysis and the full-scale evaluation test are performed to a certain type of the premium connection in a bid to evaluate the sealing ability thereof. As a result it is revealed that during the FEA process with the make-up/break off and load envelope tests as made to the premium connection,its equivalent stress is distributed rather homogeneously,and no more than the yield strength of the material,and that no structural failure and leakage are found with the extreme specimen during the full-scale evaluation test,which proves that the said premium connection is capable of having good connection strength and reliable sealing ability under complex load operation condition.