测井技术2026，Vol.50Issue(3)：464-471,8.DOI:10.16489/j.issn.1004-1338.2026.03.008
测井仪器外壳井下承压强度有限元分析
Finite Element Analysis of Downhole Pressure Bearing Strength of Logging Instrument Shell
摘要
Abstract
In order to ensure that the oil logging instrument shell can effectively protect the internal instrument under the condition of high temperature and high pressure in the downhole,and meet the requirements of safe use,this paper takes a single type of oil logging instrument shell as the research object,and carries out systematic test and simulation analysis.First,a comprehensive material property test is carried out on each component of the instrument shell by combining experimental test with finite element simulation.The key mechanical properties of the material under simulated downhole high temperature and high pressure environment are systematically tested,and the mechanical response characteristics and variation rules of the material under extreme working conditions are clarified.On this basis,combined with the actual working conditions of the downhole,a finite element model for the strength analysis of the casing of the logging tool is established.Through the simulation analysis system,the equivalent stress distribution characteristics of the shell of a single logging tool under the downhole high temperature and high pressure conditions are explored,and the potential weak parts of the shell are accurately located.The results show that the weak parts of the shell are concentrated in the structural geometric mutation area,where the equivalent stress level is high and there are structural safety hazards.Aiming at the weak parts,the structural local optimization design scheme is adopted to improve the structure.After optimization,the equivalent stress of the weak parts is significantly reduced to the allowable stress range of the material,the overall stress distribution uniformity of the shell is obviously improved,and the bearing capacity of the structure is effectively enhanced.It is concluded that the method of combining material test and finite element simulation adopted in this paper is feasible and effective.The obtained material performance parameters,stress distribution law and optimization scheme provide reliable theoretical basis and technical support for the structural design,strength check and optimization improvement of the shell of similar logging tools.关键词
测井仪器/机械外壳/高温高压/承压强度/有限元分析/应力分布/无摩擦约束Key words
logging instrument/mechanical shell/high temperature and high pressure/bearing strength/finite element analysis/stress distribution/frictionless constraint分类
天文与地球科学引用本文复制引用
王水航,周毓堂,李靖祥,陈文辉,王敬翔,王贯宇,范淑琴..测井仪器外壳井下承压强度有限元分析[J].测井技术,2026,50(3):464-471,8.基金项目
国家科技重大专项课题"超高温高压快速与成像测井装备"(2025ZD1402101) （2025ZD1402101）
中国石油天然气集团有限公司攻关性应用性专项项目"175℃@60 h全系列成像测井关键技术攻关和装备研制"(2023ZZ26) （2023ZZ26）
