Design And Analysis Of Automatic Work-over Machine Structure With Vertical Discharge Of Double Root Oil Pipe

At present,workover operations have become an important measure to ensure the stable production and increase productivity of oil fields because the oil fields in China have entered into the "three high" period.he conventional workover machines or hoists which usually adopt the operation process of man-machine cooperation to realize the single ground discharged are mainly used in the workover operations.he conventional workover machines or hoists which usually adopt the operation process of man-machine cooperation to realize the single ground discharged are mainly used in the workover operations.So technologically advanced,safe and reliable workover rigs which can protect environment and have high efficiency are seriously needed in oil fields.In this paper,a new kind of automatic hydraulic workover rigs which can complete small repair jobs automatically by using dual rooted pipe emissions is designed based on the present situation of the oil fields.The automation and unmanned operation in the process of small repair jobs are achieved in the oil fields by using the control mode of “multi-unit coordinated control automatic coupling+ man-machine control offline+PLC program control/ Manual control” which can realize the cooperative work of each key system.A new operation mode of dual rooted pipe emissions around the wellhead which can reduce nearly 20%-30% of the workover cycle and improve the operation efficiency is designed in this new hydraulic workover rig based on the traditional column loading mode.Based on the above design ideas,this paper makes thorough researches on the overall program design,key system architectural design and statics and dynamics analysis of key systems of the automatic workover machine structure with vertical discharges of dual rooted pipe emissions.Based on the above introduction,this paper completes the following aspects of work:First of all,development status and existing problems of existing workover rigs and the content,significance and objectives of this paper are analyzed.The overall program of small repair job machine including the working principle design,overall layout design,operation process design and preliminary structure design is designed based on the basic parameters and functional requirements of workover digs.The important composition systems of the well repairing machine including lifting system,two layer working table for double root oil pipe vertical discharging system,oil pipe migration and discharge equipment system,automated wellhead system,single pipe rod discharge system,variable amplitude support system are designed in detail based on the overall program.In addition,the mechanical properties and structural parameters of the key components under limiting load conditions of the well repairing machine are analyzed and calculated.Secondly,the model of the workover machine is established by using 3D modeling software,SolidWorks.According to the API standard requirements,the static analysis of key systems under each work condition of the well drilling machine including lifting system,two layer working table for double root oil pipe vertical discharging system,oil pipe migration system and discharge equipment system is analyzed and calculated by using finite element software ABAQUS.And the vibration of the tubing in the process of discharge and the force of the oil cylinder in the process of derrick hoisting are analyzed by using the dynamic analysis software.Finally,the kinematic and dynamic analysis of the oil pipe migration and discharge equipment system is analyzed based on the theory of robotics,and then the kinematics and dynamics equations of the system are derived.