中国石油大学学报（自然科学版）2025，Vol.49Issue(4)：69-76,8.DOI:10.3969/j.issn.1673-5005.2025.04.007
基于等效弯曲变形能的通井底部钻具组合设计和评价方法
Design and evaluation method of bottom-hole assembly based on equivalent bending deformation energy
摘要
Abstract
Casing used in oil and gas wells is usually of large outer diameter,thin pipe wall and high stiffness,which can make its running down operation very difficult and complex with unexpected obstructions.Especially,when the casing annu-lus clearance is small,large borehole curvature or any irregular wellbore may cause high running resistance,making the cas-ing running operation more complicated.In field practice,a tripping bottom hole assembly(BHA)is often used to correct the wellbore,smooth the borehole wall,and prepare for a smooth running of the casing string.The design and structure of the tripping BHA are important for its function and performance.In this study,a new design and evaluation method of the trip-ping BHA was proposed.Firstly,a static model of the tripping BHA and casing string was established.Then,according to continuity and boundary conditions,the spatial configuration of the tripping BHA and casing string in actual wellbore was fig-ured out based on a weighted residual method,and the deformation energy of the tripping BHA and casing string with the same length was calculated and compared.Finally,an evaluation method of the tripping BHA based on equivalent stiffness was formulated to realize the design of a new tripping BHA.The results show that a reasonable tripping BHA should have a good operation effect for small hole size,but for a well with large hole size and small casing-wellbore clearance,the tripping BHA may still have a poor operation effect,and therefore it is necessary to use a reamer to enlarging the borehole.关键词
通井BHA/套管柱/实际井筒/弯曲变形能/等效刚度系数Key words
tripping BHA/casing string/actual wellbore/energy of bend deformation/equivalent stiffness coefficient分类
能源科技引用本文复制引用
狄勤丰,李田心,李宁,文亮,尤明铭,王文昌..基于等效弯曲变形能的通井底部钻具组合设计和评价方法[J].中国石油大学学报（自然科学版）,2025,49(4):69-76,8.基金项目
国家自然科学基金面上项目(52174003) （52174003）
国家自然科学基金石油化工联合基金重点项目(U1663205) （U1663205）
国家自然科学基金青年科学基金项目(51704191) （51704191）
