基于摩擦阻力系数的卡瓦闸板对连续油管夹持特性影响分析  

Impact of Slip Ram on Coiled Tubing Clamping Based on Friction Resistance Coefficient

作　　者：刘冰[1] 陈金钢 赵永杰 綦耀光 李涛 谢鹏 LIU Bing;CHEN Jin-gang;ZHAO Yong-jie;QI Yao-guang;LI Tao;XIE Peng(College of Mechanical and Electronic Engineering,Shandong University of Science and Technology,Qingdao 266590,China;College of Mechanical and Electrical Engineering,China University of Petroleum,Qingdao 266590,China;School of Marine Engineering and Technology,Sun Yat-sen University,Southern Laboratory of Ocean Science and Engineering,Zhuhai 519000,China)

机构地区：[1]山东科技大学机械电子工程学院,青岛266590 [2]中国石油大学机电工程学院,青岛266590 [3]中山大学海洋工程与技术学院,南方海洋科学与工程广东省实验室(珠海),珠海519000

出　　处：《科学技术与工程》2020年第10期3962-3966,共5页Science Technology and Engineering

基　　金：国家自然科学基金面上项目(51174224);国家油气科技重大专项(2017ZX05042003-001,2016ZX05066004-002);大连理工大学工业装备结构分析国家重点实验室项目(GZ18120);中山大学高校基本科研业务费青年教师培育项目(18lgpy24);江苏省博士后科研资助计划项目(1601053C)。

摘　　要：针对连续油管作业过程中卡瓦闸板防喷器对其夹持时造成的划伤、缩颈并降低其使用寿命的问题,提出连续油管与卡瓦闸板之间摩擦阻力系数对其相互作用的影响。建立了卡瓦闸板夹持连续油管三维物理模型,基于弹塑性力学理论建立起其计算模型,以Ramberg-Osgood弹塑性模型为基础,采用数值模拟的手段分析了多种工况下不同摩擦阻力系数对连续油管最大Mises应力、轴向位移以及接触应力的影响。研究表明:适当增加摩擦阻力系数有利于减小连续油管上的应力集中,也有助于限制轴向位移避免划伤连续油管和造成卡瓦闸板崩齿,同时提高卡瓦闸板对连续油管的夹持效果。最终以屈服强度为指标,结合连续油管轴向位移量趋势变化给出摩擦阻力系数安全区间为0.4~0.6,旨在为连续油管安全作业提供参考。In view of the scratches,necks,and service life reduction caused by blowout preventer with slip ram during coiled tubing operation,the influence of friction coefficient between coiled tubing and slip ram on its interaction was proposed.A three-dimensional physical model of coiled tubing clamped by slip ram and its calculation model were established in elastic-plastic mechanics theory.In the Ramberg-Osgood elastic-plastic model,the maximum Mises stress,axial displacement,and contact stress of coiled tubing under various working conditions were numerically simulated and analyzed.Results show that increasing friction coefficient properly could help to reduce stress concentration on coiled tubing,to limit axial displacement,to avoid scratching coiled tubing and cracking of slip ram,and to improve the clamping effect of slip ram on coiled tubing.Finally,taking yield strength as the index and combining it with the trend change of axial displacement of coiled tubing,the safe range of friction coefficient was determined at 0.4~0.6,which provides a reference for safe operation of coiled tubing.

关 键 词：连续油管 卡瓦闸板 摩擦阻力系数 最大Mises应力 轴向位移 接触应力 

分 类 号：TE931[石油与天然气工程—石油机械设备]