纳米流控胶筒蜂窝骨架共面压缩吸能特性研究  

Energy Absorption Characteristics of Honeycomb Structure of Nanofluidic Packer Rubber Under Coplanar Compression

作　　者：章娅菲 梁经纬 刘军严[3] 肖洪玖 窦益华[1,2] Zhang Yafei;Liang Jingwei;Liu Junyan;Xiao Hongjiu;Dou Yihua(School of Mechanical Engineering,Xi an Shiyou University;Xi an Key Laboratory of Wellbore Integrity Evaluation;Oil and Gas Engineering Research Institute,PetroChina Tarim Oilfield Company)

机构地区：[1]西安石油大学机械工程学院 [2]西安市高难度复杂油气井完整性评价重点实验室 [3]中国石油塔里木油田分公司油气工程研究院

出　　处：《石油机械》2022年第12期89-95,共7页China Petroleum Machinery

基　　金：国家自然科学基金面上项目“蜂窝骨架纳米流控超高温试油与完井封隔器胶筒力学性能多尺度耦合研究”(51974246);陕西省自然科学基础研究计划面上项目“蜂窝骨架纳米流控弹性材料力学性能及能量转换机理研究”(2020JM-538);陕西省创新人才推进计划-青年科技新星项目“中高压纳米流控防喷器胶芯设计及密封性能研究”(2021KJXX-40);陕西省高校科协青年人才托举计划项目“纳米流控弹性材料的力学性能及能量转换机理研究”(20190421)。

摘　　要：纳米流控封隔器胶筒由蜂窝骨架包覆纳米流控系统构成,具有超高的吸能效率,可有效吸收射孔弹爆轰引起的压力波动,降低胶筒密封失效风险。为了解橡胶材料蜂窝支撑骨架在共面方向上的承载能力和吸能特性,建立六边形蜂窝骨架的三维模型,利用有限元分析软件,改变橡胶蜂窝骨架胞元壁厚边长比与扩展角,分析橡胶蜂窝骨架在共面压缩作用下的平均平台应力变化规律及能量吸收特性。研究结果表明:平均平台应力随壁厚边长比的增大而增大,随扩展角的增大而减小;共面压缩过程中,橡胶蜂窝骨架经历线弹性、平台区及密实化3个变形阶段;比吸能值随壁厚边长比的增大而增大,密实化阶段前,壁厚边长比越大,能量吸收速率越大,平台区越短;进入密实化阶段后,壁厚边长比越小,能量吸收速率越大,密实化区越短;得到了橡胶蜂窝骨架平均平台应力与胞元参数的关联式;壁厚边长比和扩展角的增大均可增强橡胶蜂窝骨架的能量吸收能力,但过小的壁厚和过大的扩展角都会降低蜂窝结构的稳定性。研究结果为纳米流控封隔器胶筒橡胶蜂窝骨架的设计及应用提供理论与数据支持。The nanofluidic packer rubber is a nanofluidic system coated by honeycomb structure.Its ultrahigh efficiency of energy absorption helps to absorb the pressure fluctuation during the explosion of perforation charges and reduce the risk of rubber seal failure.In order to investigate the bearing capacity and energy absorption characteristics of rubber honeycomb structure in the coplanar direction,a three-dimensional model of hexagonal honeycomb structure was established.Based on the finite element analysis software,taking the ratio of cell wall thickness to side length and the expansion angle of rubber honeycomb structure as the variables,the average platform stress variation law and energy absorption characteristics of rubber honeycomb structure under coplanar compression were analyzed.The results show that,when the ratio of wall thickness to side length increases,the average platform stress increases;when the expansion angle increases,the average platform stress decreases;in the process of coplanar compression,the rubber honeycomb structure undergoes three deformation stages:linear elasticity,flat area and densification.The specific energy absorption value increases with the increase of the ratio of wall thickness to side length.Before densification,the larger the ratio of wall thickness to side length,the higher the energy absorption rate and the shorter the platform area;after entering the densification stage,the smaller the ratio of wall thickness to side length,the higher the energy absorption rate and the shorter the densification area.In addition,the relationship between the average platform stress of rubber honeycomb structure and cell parameters was obtained.Increasing the ratio of wall thickness to side length and the expansion angle can improve the energy absorption capacity of rubber honeycomb structure.However,too small wall thickness and too large expansion angle will reduce the stability of the honeycomb structure.The results provide theoretical and data support for the design and application of rubb

关 键 词：纳米流控系统 封隔器胶筒 橡胶蜂窝骨架 胞元参数 平台应力 能量吸收 压缩比 

分 类 号：TE934[石油与天然气工程—石油机械设备]