摘要
目前在高温环境中的钛合金管体整体力学特性及钛合金筛管工程适用性评价少见报道,为此,开展了高温下管材拉伸性能及冲击特性研究、循环温度下管材应变规律研究、温度载荷变化特征研究和温度对筛管非均匀挤毁载荷影响研究,评价了钛合金筛管在高温环境中的力学特性及工程适用性。研究结果表明:α+β钛合金能通过淬火、时效使合金强化;在350℃循环温度下,钛合金筛管最大轴向伸长率为0.187%,为同规格碳钢筛管的43.5%,其轴向压缩载荷是常规碳钢筛管的37%;在350℃温度下其屈服强度相比常温降低28.7%,衰退率与J55级钢相近,350℃钛合金筛管非均匀挤毁载荷相对常温非均匀挤毁载荷值降低36%。所得结论可为复杂超深层油气井、稠油热采井筛管选型提供新方向。
At present,there are few reports on integral mechanical properties and the engineering applicability evaluation of titanium alloy screen pipe at high temperature.In this paper,the tensile properties and impact properties of the screen pipe at high temperature,the strain law of the screen pipe at circulating temperature,the variation characteristics of temperature load and the influence of temperature on the uneven collapse load of the screen pipe were studied,and the mechanical properties and engineering applicability of titanium alloy screen pipe at high temperature were evaluated.The results show thatα+βtitanium alloy can be strengthened by quenching and aging.At the circulating temperature of 350℃,the maximum axial elongation of titanium alloy screen pipe is 0.187%,which is 43.5%of that of carbon steel screen pipe with the same specification;and its axial compression load is 37%of that of conventional carbon steel screen pipe.At 350℃,its yield strength is 28.7%lower than that at room temperature,and its decline rate is similar to that of J55 grade steel.The uneven collapse load of titanium alloy screen pipe at 350℃is 36%lower than that at room temperature.The conclusions provide a new direction for the selection of screen pipe in complex ultra-deep oil and gas wells and heavy oil thermal recovery wells.
作者
李冰
周波
汪海阁
查永进
张富成
何柳
Li Bing;Zhou Bo;Wang Haige;Zha Yongjin;Zhang Fucheng;He Liu(CNPC Engineering Technology R&D Company Limited)
出处
《石油机械》
北大核心
2022年第11期81-89,共9页
China Petroleum Machinery
基金
国家科技重大专项子课题“深井超深井井筒安全钻井技术与装备”(2016ZX05020003)
中国石油天然气集团有限公司科学研究与技术开发项目“水平井优质高效钻完井技术研究”(2021DJ4205)。
关键词
钛合金
筛管
应变
温度载荷
非均匀挤毁
titanium alloy
screen pipe
strain
temperature load
uneven collapse
