该文对XXJ30 0 5 0 0液压蓄能修井机液压系统进行了设计分析。该系统采用一种特殊的组合液压缸进行起下管柱作业 ,利用 1个大型蓄能器大大减小了动力机装机功率 ,可以回收管柱下放时释放出来的重力势能 ,节能效果显著 This paper designs and analyzes the hydraulic system of XXJ30 0 500 hydraulic workover rig. The system uses a special combination of hydraulic cylinder to start the pipework, the use of a large accumulator greatly reduces the power machine installed power, can be released when the pipe release gravity potential energy, significant energy saving effect