钻探工程2024，Vol.51Issue(4)：1-6,6.DOI:10.12143/j.ztgc.2024.04.001
万米井用超高强高韧套管的研制及组织表征
Development and structure characterization of ultra-high strength and toughness casing for myriametric well
摘要
Abstract
According to the construction requirements of myriametric extra-deep well,the BG155V casing with good toughness,high-temperature strength,collapse resistance and delayed fracture resistance is developed on the basis of alloying technology and manufacture process optimization.The test results of batch production showed that the yield strength reaches over 1100 MPa,and the transverse Charpy impact energy at 0℃reached 10%of the nominal yield strength,and the strength and low temperature toughness and microstructure of casing under different service temperatures were analyzed.It was found that the grain size level of the casing with controlled cooling process after hot rolling reaches up to 11.The fine grains ensure good toughness and delayed fracture resistance of the material,which improves the reliability of the casing in the myriametric extra-deep wells for the development of oil and gas resource.关键词
套管/高温强度/高韧性/晶粒度/抗延迟断裂/万米井/特深井Key words
casing/high-temperature strength/high toughness/grain size/resistance to delayed fracture/myriametric well/extra-deep well分类
石油、天然气工程引用本文复制引用
高展,董晓明,张忠铧..万米井用超高强高韧套管的研制及组织表征[J].钻探工程,2024,51(4):1-6,6.基金项目
国家重点研发计划"深地油气资源勘探用高强韧钢管材及应用技术研究"(编号:2023YFB3711700,2023YFB3711702) （编号:2023YFB3711700,2023YFB3711702）
