摘要
射孔爆轰会产生高温高压气体,若压力超过枪身抗内压强度,会使射孔枪破裂,导致胀枪卡枪等事故。为防止射孔枪在高温高压气体下损坏,设计了一种活塞-弹簧式射孔枪泄压装置,可实现射孔枪泄压,保证射孔作业安全进行。泄压装置主要由泄压连接缸、泄压套、弹簧、活塞杆及密封圈组成,射孔枪内气体压力较高时,会推动活塞杆压缩弹簧,活塞杆大端面移动至泄压套上泄压孔处,气体经泄压孔流入油套环空,从而达到泄压目的。建立射孔枪泄压装置的三维有限元模型,分析泄压装置工作状态下的强度安全性。研究结果表明,常规工作压力下,泄压连接缸、泄压套和弹簧的最大等效应力分别为593.57、554.6、1 117.5 MPa,安全系数分别为1.28、1.37、1.23,说明射孔枪泄压装置满足强度安全性要求。研究的射孔枪泄压装置结构简单,安装容易,可重复使用,能有效起到泄压和缓冲作用,确保射孔作业安全进行。
Perforation detonation produces high-temperature and high-pressure gas.If the pressure exceeds the internal pressure strength of the gun body,the perforating gun would break,leading to accidents such as gun expansion and jamming.To prevent the perforating gun from damaging in high-temperature and high-pressure gas,a piston-spring perforating gun pressure relief device was designed,helping the perforating gun achieve pressure relief and ensuring the safety of perforating operations.The pressure relief device is mainly composed of pressure relief connecting cylinder,pressure relief sleeve,spring,piston rod and sealing ring.When the gas pressure in the perforating gun is high,it pushes the piston rod to compress the spring.The large end face of the piston rod moves to the pressure relief hole on the pressure relief sleeve,and the gas flows into the tubing-casing annulus through the pressure relief hole,thus achieving the purpose of pressure relief.Finally,a 3D finite element model of the pressure relief device for perforating gun was built to analyze the strength safety of the pressure relief device under working conditions.The analysis results show that under conventional working pressure,the maximum equivalent stresses of the pressure relief connecting cylinder,pressure relief sleeve and spring are 593.57 MPa,554.6 MPa and 1117.5 MPa respectively,with safety factors of 1.28,1.37 and 1.23,indicating that the pressure relief device for perforating gun meets the strength safety requirements.The pressure relief device for perforating gun is simple in structure,easy to install and reusable,and it can effectively play a role in pressure relief and buffering,and ensure the safety of perforating operations.
作者
李明飞
张丹鹏
李必红
贺建磊
田斌
林立明
窦益华
Li Mingfei;Zhang Danpeng;Li Bihong;He Jianlei;Tian Bin;Lin Liming;Dou Yihua(School of Mechanical Engineering,Xi'an Shiyou University;Wuhua Energy Technology Co.,Ltd.;Daqing Oilfield Perforating Equipment Co.,Ltd.)
出处
《石油机械》
北大核心
2025年第8期60-65,共6页
China Petroleum Machinery
基金
陕西省重点研发项目“基于改进SPH法粒子追踪的超强低损伤射孔弹优化设计方法研究”(2024GX-YBXM-500)
低渗透油气田勘探开发国家工程实验室开放课题“页岩油水平井压裂过程中套损机理研究”(2023014)。
关键词
射孔爆轰
射孔作业
射孔枪
等效应力
泄压
强度分析
有限元
perforation detonation
perforating operation
perforating gun
equivalent stress
pressure relief
strength analysis
finite element
