Design And Simulation On Wellhead Equipment Of The Remote Control In Workover Operations

In this paper, based on the progress of workover operation, and kinds of automationtechnology of home and aboard in workover and drilling equipment are investigated andanalyzed fully. A system scheme that can better realize automatic righting pipe, shifting,grasping pipe, make-up and break-out pipe, hanging hold the pipe string by mechanicalautomation is put forward. This system is named as remote control of wellhead mechanism.The wellhead mechanism is divided into three parts, respectively called the mechanical handof righting, mobile operations work and base. Mmechanical hand is fixed to the cover ofmobile operations work, the reciprocating motion of mobile operations work on the base.The main content of this thesis is including the design and theoretical research of theremote control wellhead of mechanism system, the simulation reasearch of virtual prototype,and testing function of the system. The design of the wellhead mechanism of remote controlin the detaile is completed, including the structural design of mechanism and the principledesign of the hydraulic system, the3D models of whole system are created by SolidWorkssoftware. By kinematics and kinetics theories, the displacement, velocity and accelerationequations of the centralizer mechanical hand are derived, raising the effective range ofmechanical hand righting pipe, the dynamic analysis of the buffer and positioning device.This paper introduces the principles of hydraulic and mathematical models of hydrauliccomponents in ADAMS/Hydraulics module, and points out the general steps of entity modelfrom SolidWorks convet into ADAMS, and creates mechanism and hydraulic systemco-simulation models. First, the study of dynamics simulation of mechanical system,including mechanical hand set upright the pipe, clamp pipe tightly of hydraulic tong, powerslip loosen of the pipe, and buffering process of buffer and positioning device, the results ofsimulation are used for guiding the design of hydraulic system. Secondly, create hydrauliccircuit respectively, and go on mechanism and hydraulic systems co-simulation, including themechanical hand righting pipe in the different working conditions and flowrates, back-uptong of the power tong clamp pipe in different pressure and the power slip opening pipe indifferern flowrates. Finally, find out various components of the regular work hydraulic systemparameters through co-simulation, to provide the theory basis for components selection ofhydraulic system and shorten the time of hydraulic system debugging and testing.At last, this article introduces the physical prototype of the wellhead equipment ofremote control, and the function of each component is tested in indoor. The results of testingshow that the overall scheme of the wellhead equipment is feasible. The functions of thewellhead equipment such as set the pipe upright, shift gears, alignmente of the gap, suspendof the pipe automatically. The unmanned automatic operating function is realized, and higherdegree of mechanization, and meet the basic requirements of safety in the workover operation.To contrast the results of test and simulation, we can find that the simulation models arecorrect, and the characteristics of the system are reflected by simulation results.