基于升频技术的石油排采系统优化分析

Optimization Analysis of Petroleum Drainage System Based on 'Ascending-Frequency' Technology

针对油井的游梁式抽油机的机械结构,采用经典力学方法,分析了应用升频技术后对石油排采系统的影响。分析结果表明:升频会使系统曲柄转速产生明显变化,但是对于切向方向上的曲柄扭矩影响不大;悬点的线速度和加速度受到的影响会大幅增加,将导致悬点载荷增大;升频运行时,系统实际工作冲次大于设定工作冲次;配重不平衡越严重,影响也越大。以上分析结果可为石油排采系统采用升频技术与合理选择工况提供了理论依据。

In view of the mechanical structure of sucker rod pump system in oil w ell,the classical kinetic method was used to analyze the influence in petroleum drainage system bring by using ‘ascending frequency’ technology in beam pump.The results indicated that,‘ascending frequency’technology scheme could make the crank speed changes obviously,but it has little effect on the crank torque in cut-direction;polished rod velocity and acceleration would be greatly increased by these influences,which would lead to the increase of polished rod load.The actual jig frequency is greater than the set jig frequency when using ‘scending frequency’technology.The more serious the imbalance is,the greater the impact.The above analysis results can provide a theoretical basis for the application of ‘ascending frequency’technology and the rational selection of working conditions in the petroleum drainage system.