基于PLC的不压井修井机液压控制系统  

The Hydraulic Control System of Snubbing Unit Based on PLC

作　　者：钟功祥[1] 周耀胜[1] 吕治忠[1] 刘涛[2] 林宁[1] 

机构地区：[1]西南石油大学石油天然气装备教育部重点实验室,四川成都610500 [2]胜利油田临盘采油厂,山东德州253000

出　　处：《液压与气动》2014年第2期117-120,共4页Chinese Hydraulics & Pneumatics

基　　金：省部共建"石油天然气装备"教育部重点实验室(西南石油大学)资助项目(2011sts03)

摘　　要：为了提高不压井作业的自动化程度,降低工人的劳动强度,针对现在广泛应用的独立式不压井修井机,设计了一种基于PLC的不压井修井机控制的液压控制系统。阐述了独立式不压井修井机的基本工作原理,提出了具体的液压控制系统方案和PLC控制框架。采用两级起升液缸和差动回路交替控制,实现了快速起升及缓慢下放油管作业。动力卡瓦回路采用了四缸同步回路和互锁控制,使得油管能自动对中。PLC控制实现了动态寻找起、下作业的"平衡点"以及各种修井作业的自动控制。该系统提高了不压井修井机的工作效率,避免了起下管柱作业的过程中生产事故的发生,增强了作业的自动化和安全性。Aimed at the widely used stand-alone snubbing unit,a hydraulic control system based on PLC was proposed to improve the snubbing degree of automation and reduce labor intensity.The basic working principle of the independent hydraulic snubbing unit was described.And the hydraulic system program and the PLC control framework were proposed.The fast and slow decentralization of tubing operations was realized by using two-grade rise cylinder and differential circuit alternating control.A four-cylinder synchronization circuit and the interlock control were used in the power slips loop for the automatic centering of the tube.The PLC control has achieved automatic workover operations and the control of dynamic looking up the balance point of operating.The system improves the efficiency of the snubbing unit.The production accident occurred in the column operations process is avoided.The security and automation of snubbing have greatly improved.

关 键 词：不压井修井机 液压控制系统 PLC 自动化 

分 类 号：TH137[机械工程—机械制造及自动化] TE93[石油与天然气工程—石油机械设备]