球型防喷器胶芯安全性能与结构优化  

Safety Performance and Structural Optimization of Rubber Core of Spherical Blowout Preventer

作　　者：刘洋[1] 黎文奇 管锋[1] 刘少胡[1] 牟易升 易先中[1] LIU Yang;LI Wenqi;GUAN Feng;LIU Shaohu;MOU Yisheng;YI Xianzhong(School of Mechanical Engineering,Yangtze University,Jingzhou,Hubei 434023,China;Tubular Goods Research Institute,CNPC,Xi’an,Shaanxi 710077,China)

机构地区：[1]长江大学机械工程学院,湖北荆州434023 [2]中国石油集团工程材料研究院有限公司,陕西西安710077

出　　处：《西安石油大学学报（自然科学版）》2024年第1期97-105,共9页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家自然科学基金“地面旋转导向钻井新方法及其控制机理”(51974035);湖北省重点研发计划项目“智能钻井多维动力集成钻具研发及应用”(2020BAB055)。

摘　　要：为了评价球型防喷器胶芯的安全性能,以球型密封胶芯为研究对象,通过材料拉伸和压缩试验,获得了胶芯的最优本构关系数据,并根据球型胶芯结构进行了二次优化设计。利用ABAQUS软件对优化前后的球型胶芯结构进行了数值模拟分析,找到了常规胶芯在密封过程中的变形规律,并对优化后的胶芯结构进行了安全性能评价分析。结果表明:胶芯向中心收缩的过程中,胶芯上部的橡胶沿径向方向的变形最大,胶芯向中心方向挤出的橡胶逐渐减少,最大接触压力值发生在胶芯棱边与钻杆接触的区域,改进后胶芯和钻杆的平均接触压力及密封长度相对改进前的变大。确定球型胶芯密封段最优倒角切削量+5 mm,该结构形式的球型胶芯密封性能较好,有助于提高球型胶芯的使用寿命。In order to evaluate the safety performance of the rubber core of the spherical blowout preventer,taking the spherical rubber core as the research object,and the optimal constitutive relationship data of the rubber core are obtained through material tensile and compression tests.The secondary structure optimization design of the spherical rubber core was carried out.The numerical simulation of the structure of the spherical rubber core before and after the optimization was carried out by using ABAQUS software.The deformation law of the conventional rubber core in sealing process was found,and the safety performance of the optimized rubber core was evaluated.The results show that in the process of the rubber core shrinking toward the center,the rubber on the upper part of the rubber core undergoes the greatest radial deformation,and the amount of rubber extruded from the rubber core towards the center gradually decreases.The maximum contact pressure value occurs in the area where the edge of the rubber core contacts the drill pipe.The average contact pressure and sealing length of the improved rubber core and the drill pipe become larger than before.Finally,it is determined that the optimal chamfer cutting amount of the sealing section of the spherical rubber core is 5 mm.The spherical rubber core with this structure has good sealing performance,which is helpful to improve the service life of the spherical rubber core.

关 键 词：球型防喷器 安全性能 接触压力 结构优化 

分 类 号：TE938[石油与天然气工程—石油机械设备]