Development And Experimental Research Of Crown-block Heave Compensation Test System

The floating drilling device is affected by waves,which drives drill string movement,causes bottom hole pressure change,reduces drilling efficiency and even causes drilling accidents.It is necessary to install heave compensation device for drill string motion compensation.Taking development and research of crown-block heave compensation experimental device can provide technical support for the design and manufacture of the prototype.The experimental device determines the design parameters of the experimental device based on the similarity theory.This paper introduces the crown-block heave compensation experimental device,including the mechanical structure,hydraulic system scheme and the working principle of the crane’s heave compensation experimental device.In this paper,the dynamic simulation model of the system is built in ADAMS,and the hydraulic system simulation model is built in AMESim,and the two software is jointly simulated and analyzed,which verifies the feasibility of the experimental device.The simulation results show that the passive heave compensation rate is about 57%,and the semi-active heave compensation rate is over 95%.When the speed is used as the control signal,the system has better compensation effect,the energy consumption of the system decreases with the increase of the accumulator volume,and decreases with the decrease of the active cavity area.When the compensation effect is consistent,the energy consumption of the system is smaller when the compensation cylinder is inclined to install,but the force performance is poor.The paper completes the control system of the experimental device,the control system uses SIEMENS PLC as the controller,and the upper computer uses WinCC to configure the human-computer interaction interface,the TCP/IP protocol is used between PLC and WinCC,the pump PLC and the valve PLC.This paper completes hardware system design including selecting CPU,power and I/O of PLC and so on,completes software system design including programming pump PLC and valve PLC and debugging,completes the monitoring system including configuring control interface,dynamic curve interface,the alarm interface and the login interface and so on.This paper completes simulation of heave movement,load and heave compensation and experimental research on semi-active heave compensation.The results show that the system compensation rate is about 93%,the displacement of the hook increases with the increase of the heave displacement.The hook displacement is the smallest and the system compensation effect is the best by using P+PI control.The experiment study compensation performance of the system under different conditions,the results show that the compensation capacity of the system is greatly influenced by the period of the heave and the dead zone of the proportional valve.