某井套管分级箍螺纹接头脱扣原因分析  

Cause Analysis for Connection Pull Over of Casing Stage Cementing Collar as Used in a Certain Oil Well

作　　者：薛建 吕拴录 李鹏 郭婷 李江 XUE Jian;LYU Shuanu;LI Peng;GUO Ting;LI Jiang(CNOOC Inspection Technology Co.,Ltd.,Tianjin 300452,China;Material Science and Engineering Department,China University of Petroleum,Beijing 100249,China;Xi’an Maurer Petroleum Engineering Laboratory Co.,Ltd.,Xi’an 710065,China)

机构地区：[1]中海石油技术检测有限公司,天津300452 [2]中国石油大学材料工程系,北京100249 [3]西安摩尔石油工程实验室股份有限公司,陕西西安710065

出　　处：《钢管》2024年第6期66-72,共7页Steel Pipe

摘　　要：研究某井套管分级箍脱扣事故,发现脱扣的分级箍外螺纹接头参数和材质符合标准要求,再系统排查和分析套管和分级箍运输、储存、检验和使用等环节,认为分级箍螺纹接头脱扣主要原因是套管接箍变形后上扣不到位所致。建议严格执行用户企业标准,并对套管保护环进行严格检验和评价。An investigation is conducted into the connection pull over failure of the casing stage cementing collar as used in a certain domestic oil well,and it was found that the measured parameters of the external threaded connection of the stage cementing collar and the material is in compliance with the requirements of relevant standard.Furthermore a sys-tematic trouble-shooing and analysis are carried out to all the operation steps in association with the casing and the stage cementing collar,including transportation,storage,inspection and usage,based on which,it is regarded that the reason for the connection pull over failure is the non proper make up of the threaded connection of the stage cementing collar due to the deformation of the casing coupling.Accordingly it is suggested to strictly implement relevant customer company’s standard,and also perform stringent inspection and evaluation of the casing protection ring.

关 键 词：套管分级箍 外螺纹接头 脱扣 套管保护环 

分 类 号：TE931.2[石油与天然气工程—石油机械设备]