中国石油大学学报（自然科学版）2025，Vol.49Issue(2)：196-204,9.DOI:10.3969/j.issn.1673-5005.2025.02.019
海洋平台中小尺寸废弃套管水下等离子内切割新方法研究
Study on new method of underwater plasma internal cutting of small-sized waste casing for offshore platforms
摘要
Abstract
A plasma internal cutting technology for small-sized waste casing in offshore platforms was proposed to solve the problems of high stress,serious environmental pollution and high cost when cutting small-size casing by traditional casing cut-ting methods.A new type of plasma torch was developed to solve the problems of poor cooling effect and rapid loss of tradi-tional plasma torch.Through the study of flow line distribution of the cooling flow field,the internal mechanism of the cooling runner structure affecting the heat dissipation effect was revealed,and the optimized design of the structure was carried out,which significantly improves the cooling performance of the torch.Through the experimental study of casing cutting,the influ-ence of cutting current,inlet air pressure and cutting speed on the quality of casing cutting was obtained,and the intrinsic mechanism affecting the energy density of plasma beam was revealed.The cutting process parameters were optimized using the response surface method,and the cutting current as well as the inlet air pressure was predicted at the optimal cutting speed.The results show that the new method can be used to complete the whole circle cutting of 88.9 mm waste casing within 3 minutes,and the cutting section is neat and smooth,realizing the efficient cutting of small-sized waste casing.关键词
等离子切割/小尺寸套管/流固热耦合/响应面法Key words
plasma cutting/small-sized casing/fluid-solid-thermal coupling/response surface methodology分类
矿业与冶金引用本文复制引用
纪仁杰,邱玉威,李小璟,刘永红..海洋平台中小尺寸废弃套管水下等离子内切割新方法研究[J].中国石油大学学报（自然科学版）,2025,49(2):196-204,9.基金项目
国家自然科学基金项目(51675535) （51675535）
装备预研教育部联合基金创新团队项目(8091B042209) （8091B042209）
泰山学者工程专项(tsqn202306118) （tsqn202306118）
