摘要
三高(高压、高产及高含H2S)气井中的油、套管设计,按现行API 5C3标准,油、套管强度常常不能满足设计要求,许多套管的实际安全系数低于设计标准,给设计造成一定的困惑。ISO10400:2007给出了两端堵口的油、套管抗内压韧性爆裂模型,但计算精度不够理想,而且有些预测值要明显高于实物爆裂值。为此,根据材料屈强比对油、套管爆裂强度影响规律进行研究,给出了具有更高精度的油、套管抗内压爆裂计算新模型。数据计算对比表明,油、套管抗内压爆裂计算新模型的计算值与实物爆裂值吻合。该研究方法对优化油、套管设计和改善油、套管制造质量提供了重要的参考依据。
As far as the design of tubing and casing in three-high(high pressure,high production and high H2S-content) gas wells is concerned,the casing strength often cannot satisfy the requirement of design and the practical safety coefficient of some wells is lower than the design standard according to the present API 5C3 standard,which brings some perplexity to the design.The ISO 10400:2007 offers the model of the resistance to internal pressure and ductile blowout of tubing and casing,but the calculation precision is not desirable and some predictive values are remarkably higher than real burst values.Accordingly,the research on the law of the effect of material yield strength ratio on the burst strength of tubing and casing offers a new and more precise calculation model of tubing-casing's resistance to internal burst.The data calculation and comparison shows that the calculation value of the new model matches the real burst value.The research method provides an important reference to optimizing the design of tubing and casing and to improvement of the manufacturing quality of tubing and casing.
出处
《石油机械》
北大核心
2010年第2期20-22,1,共3页
China Petroleum Machinery
基金
国家新世纪优秀人才支持计划项目"高含H2S气藏完井管柱设计及其可靠性研究"(NCET-08-0907)
四川省杰出青年学科带头人培养基金项目"石油膨胀管关键技术研究"(06ZQ026-028)
关键词
油管
套管
抗内压
爆裂API
5C3标准
屈强比
tubing,casing,resistance to internal pressure,burst,API 5C3 standard,yield strength ratio
