摘要
根据试油试采工况的特点与需求,提出采用液压泵/马达作为平衡配重的移动式试油试采系统.试油试采系统采用开关磁阻电机作为主驱动电机,采用液压泵/马达和蓄能器作为配重.在下冲程时将抽油杆势能和主驱动电机输出的能量储存,在上冲程时将储存的能量释放,液压泵/马达和蓄能器组成的配重与主驱动电机共同提升抽油杆.利用质量集中法,将试油试采系统简化为三质量二联结系统,建立系统动力学模型,通过Simulink仿真得到系统动力学特性,包括抽油杆位移和速度、液压系统压力以及主驱动电机的功率.通过分析仿真结果可知,系统满足试油试采作业对于冲程冲次的要求;通过液压平衡配重提高了能量利用率,可以减小系统装机功率64.3%;电机运行工况得到改善,不对负载提供阻力矩,无负功工况,减小了对电力系统的冲击;系统结构紧凑,集成度高,便于运输.
A movable well test and production test system was proposed according to the characteristics and requirements of well test and production test.The system used switched reluctance motor as main drive motor,hydraulic pump/ motor and accumulator as counterweight.The counterweight stored potential energy of the sucker rod and output energy of the main drive motor during the down stroke,and released them out during the upstroke to lift the sucker rod together with the main drive motor.Using lumped mass method,the simplified system can be regarded as a model which contains three mass and two couplings.The dynamic model of the system was established.The dynamic characteristics,including the displacement and speed of the sucker rod,the pressure of the hydraulic system and the motor power,were obtained by Simulink simulation.The simulation results show that the stroke,jig frequency and other characteristics meet the requirements of well test and production test.The system can improve energy utilization rate,and reduce installed power by 64.3%.The main drive motor doesn＇t provide resistance moment,and the operation conditions are improved,which reduces the impact on the power system.The system is with high integration and easy to transport.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2016年第4期650-656,共7页
Journal of Zhejiang University：Engineering Science
基金
浙江省重点科技创新团队自主设计资助项目(2013TD01)
