油田闸板防喷器弹塑性应力计算及评定
Elasto-plastic stress analysis and strength evaluation of ram blowout preventer in oilfield
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- 引用格式:
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梁向东,万晓航,解景浦,张跃凯,王文强.油田闸板防喷器弹塑性应力计算及评定[J].天然气与石油,2022,40(1):44-50.doi:10.3969/j.issn.1006-5539.2022.01.007
LIANG Xiangdong, WAN Xiaohang, XIE Jingpu, ZHANG Yuekai, WANG Wenqiang.Elasto-plastic stress analysis and strength evaluation of ram blowout preventer in oilfield[J].Natural Gas and Oil,2022,40(1):44-50.doi:10.3969/j.issn.1006-5539.2022.01.007
- DOI:
- 10.3969/j.issn.1006-5539.2022.01.007
- 作者:
- 梁向东1 万晓航1 解景浦1 张跃凯2 王文强3
LIANG Xiangdong1, WAN Xiaohang1, XIE Jingpu1, ZHANG Yuekai2, WANG Wenqiang3
- 作者单位:
- 1. 河北工业职业技术大学, 河北 石家庄 050091; 2. 中油管道机械制造有限责任公司, 河北 廊坊 065000; 3. 华陆工程科技有限责任公司, 陕西 西安 710065
1. Hebei Vocational University of Industry and Technology, Shijiazhuang, Hebei, 050091, China; 2. China Petroleum Pipeline Machinery Manufacture Co., Ltd., Langfang, Heibei, 065000, China; 3. Hualu Engineering & Technology Co., Ltd., Xi‘an, Shaanxi, 710065, China
- 关键词:
- 防喷器;有限元;极限载荷;子模型
Blowout preventer; Finite element; Ultimate load method; Sub modelling
- 摘要:
闸板防喷器是油田开采中的重要井控设备,是井口安全控制的重要保障。防喷器内部结构复杂,需要详细地对承压结构进行强度分析和计算,以保证设备安全运行,并为结构优化提供重要依据。基于JB 4732—1995《钢制压力容器——分析设计标准》和有限元方法,采用应力分类法和极限载荷法对闸板防喷器壳体进行强度分析,应用子模型技术提取结构危险部位进行局部细化研究,实现整体和局部应力状态的全面分析,同时提高计算效率。分析结果表明,壳体强度在各类工况下均满足标准要求,且尚有一定裕度；通过子模型技术对结构边缘作倒圆角处理后,计算得出一次局部薄膜应力强度SⅡ、一次薄膜加一次弯曲应力强度SⅢ较之前分别降低27%和36%。分析结果可为该类设备强度分析与优化提供一定参考。
Ram blowout preventer is an important well control equipment in oilfield production and an important guarantee for wellhead safety control. The internal structure of blowout preventer is complex. To guarantee the safe operation of the equipment, and provide basis for structure optimization, it is necessary to analyze and calculate the strength of the pressure bearing structures. Based on JB 4732—1995 Steel pressure vessels——design by analysis and the finite element method, the stress classification method and the ultimate load method were used to analyze the strength of the shell. The sub modelling technique technology was used to analyze and optimize the local section in detail. The results show that: 1)the strength of the shell meets the standard requirements under various working conditions and there is still a certain margin; 2) by creating fillet on the edge of structure with sub-modelling technique and conducting detailed research on critical local part of the structure, the full analysis of overall and local stress is conducted. Together with an improved calculation efficiency, the stress intensity of local film stress strength SⅡ and film and bending stress strength SⅢ decreases by 27%and 36%respectively, as compared to earlier calculation. The research results can provide some reference for strength analysis and optimization for this kind of equipment.
