外压与弯矩组合载荷作用下筛管压溃载荷计算  

Collapse pressure calculation of sand control screen tube under combined external pressure and bending

作　　者：付光明 彭玉丹 孙宝江 郭永宾[3] 高永海 蓝祖平 金学义[5] FU Guangming;PENG Yudan;SUN Baojiang;GUO Yongbin;GAO Yonghai;LAN Zuping;JIN Xueyi(Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao 266580, China;School of Petroleum Engineering in China University of Petroleum (East China), Qingdao 266580, China;Zhanjiang Branch, CNOOC China Limited, Zhanjiang 524057, China;Offshore Oil Engineering (Qingdao) Company Limited, Qingdao 266520, China;China Oilfield Services Company Limited, Sanhe 065201, China)

机构地区：[1]非常规油气开发教育部重点实验室(中国石油大学(华东)),山东青岛266580 [2]中国石油大学(华东)石油工程学院,山东青岛266580 [3]中海石油(中国)有限公司湛江分公司,广东湛江524057 [4]海洋石油工程(青岛)有限公司,山东青岛266520 [5]中海油田服务股份有限公司,河北三河065201

出　　处：《中国石油大学学报（自然科学版）》2021年第2期78-86,共9页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家自然科学基金项目(51709269,51890914);山东省自然科学基金项目(ZR2017BEE031);国家重大专项(2016X05028-001-003);中国海洋石油集团有限公司“十三五”科技重大项目(CNOOC-KJ135ZDXM05LTD06SHENHAI 2016);深水油气管线关键技术与装备北京市重点实验室开放基金项目(BIPT2018003)。

摘　　要：筛管在服役过程中受出砂、地层运动等导致的外压和弯曲等复杂载荷影响,易发生压溃失效问题。利用ABAQUS软件建立考虑初始椭圆度的平行布孔筛管的有限元模型,研究外压和弯矩组合载荷作用下筛管的压溃行为。基于不同径厚比、布孔参数、弯矩载荷下筛管压溃载荷计算数值模拟结果,建立弯曲和外压组合载荷下筛管压溃载荷简化公式。结果表明在纯弯矩载荷作用下,筛管的孔眼处易发生受应力集中现象,进而导致塑性变形失效;外压和弯矩组合载荷作用条件下,当弯矩载荷沿着椭圆截面的短轴加载时,筛管压溃载荷随着转角的增大而减小;弯矩载荷沿着椭圆的长轴加载时,筛管压溃载荷存在峰值,随着载荷继续增加,筛管的后压溃变形形态会发生转变;外压和弯矩组合载荷作用下筛管压溃载荷公式计算结果与有限元结果的平均误差小于2.7%。The collapse failure of the sand control screen tube subjected to combined external pressure and bending load has become a major concern in oil and gas production wells.In this study,a finite element model of the screen tube with an initial ovality was developed using the ABAQUS software,and its collapsing behavior under combined external pressure and bending was studied.Based on the numerical simulation results of the collapse pressure under different radius-thickness ratio,the hole parameters of the screen tube,a simplified formula for calculating the collapse pressure of the screen tube under combined bending and external pressure was established.The results show that,under pure bending load,aplastic deformation of the screen occurs firstly at near the screen holes.Under combined fluid pressure and bending,when the bend loading direction is along the minor axis of the oval tube cross-section,the collapse pressure on the screen decreases with the increase of the bending load.The higher of the tube ovality,the smaller the collapse pressure of the screen tube can be observed.When the bend loading direction is along the major axis of the oval tube cross-section,and with the increasing of the bending,a peak value of the collapse pressure can be obtained.The average difference between the calculated results with formula and that obtained using the finite element method is less than 2.7%.

关 键 词：防砂筛管 有限元模型 组合载荷 压溃载荷 

分 类 号：TE257[石油与天然气工程—油气井工程]