Reshaping force for deformed casing repairing with hydraulic rolling reshaper and its influencing factors  

作　　者：Hong-Fei Li Min Luo Ting-Ting Xu Qiao-Zhen Li Cong-Jian Huang 

机构地区：[1]School of Mechanical Science and Engineering,Northeast Petroleum University,Daqing,163318,Heilongjiang,China

出　　处：《Petroleum Science》2024年第4期2745-2757,共13页石油科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (51674088);Natural Science Foundation of Heilongjiang Province of China (LH 2021E011)。

摘　　要：Hydraulic rolling reshaper is an advanced reshaping tool to solve the problem of casing deformation,which has been widely used in recent years.When it is used for well repair operation,the reshaping force provided by ground devices is generally determined by experience.However,too large reshaping force may destroy the deformed casing,and too small reshaping force may also prolong the construction period and affect the repairing effect.In this paper,based on Hertz contact theory and elastic-plastic theory,combined with the process parameters of shaping,and considering the structural characteristics of the deformed casing and reshaper,we propose a mathematical model for calculating the reshaping force required for repairing deformed casing by hydraulic rolling reshaper.Meanwhile,the finite element model and numerical method of hydraulic rolling reshaper repairing deformed casing are established by using the finite element method,and the reliability of the mathematical model is verified by several examples.On this basis,the control variable method is used to investigate the influence of each parameter on the reshaping force,and the influence degree of each parameter is explored by orthogonal simulation test and Pearson correlation analysis.The research results not only provide an important theoretical basis for the prediction of reshaping force in on-site construction,but also provide a reference for the subsequent improvement of the shaping process.

关 键 词：Hydraulic rolling reshaper Reshaping force Deformed casing Casing reshaping Hertz contact theory 

分 类 号：TE931.2[石油与天然气工程—石油机械设备] TG306[金属学及工艺—金属压力加工]