海底弃井等离子弧切割装备研究  

Research on Plasma Cutting Equipment of Submarine Abandoned Well

作　　者：刘鹏[1] 刘永红[1] 孙强[1] 武鑫磊 韩延聪 LIU Peng;LIU Yonghong;SUN Qiang;WU Xinlei;HAN Yancong(College of Mechanical and Electronic Engineering,China University of Petroleum,Qingdao 266580,China)

机构地区：[1]中国石油大学(华东)机电工程学院,山东青岛266580

出　　处：《电加工与模具》2022年第4期61-65,共5页Electromachining & Mould

摘　　要：为提高海底井口弃置作业效率、节省作业成本,基于等离子切割方法自主设计并研制了一套切割海底弃井的专用装备,可实现对井下套管的环形切割。首先,借助动力学仿真方法分析了该装备的运动特性和力传递特性;接着,借助有限元仿真方法分析了装备关键零部件的强度;最后,借助装备实验平台开展了水下套管环切实验。结果表明:在等离子供气压强为0.15 MPa、切割电流为200 A的条件下,对一根壁厚12 mm的9-5/8英寸套管进行完整水下环切仅需2 min,切割效率得到极大提高。In order to improve the efficiency of subsea wellhead abandonment operation and save operation cost,a set of subsea wellhead abandonment cutting special equipment was designed and developed based on plasma cutting method,which can realize circular cutting of downhole casing.For the designed equipment,with the help of dynamic simulation method,the movement characteristics and force transfer characteristics of the equipment are analyzed,and the strength of the key parts of the equipment is analyzed with the help of finite element simulation method.Finally,using the developed equipment,the underwater casing circumcision experiment is carried out.The experiment shows that under the condition of plasma supply pressure of 0.15 MPa and cutting current of 200 A,it only takes 2min to realize the underwater circumcision of a 9-5/8"casing with a wall thickness of 12 mm,and the cutting efficiency is greatly improved.

关 键 词：海底弃井 等离子切割 动力学仿真 有限元仿真 

分 类 号：TG669[金属学及工艺—金属切削加工及机床]