地面驱动螺杆泵负载扭矩波动机制  

Oscillation mechanism of ground drive screw pump load torque

作　　者：杨永华[1,2] 郑学成[3] 

机构地区：[1]中国石油大学石油工程学院,北京102249 [2]大庆油田公司质量节能部,黑龙江大庆163412 [3]大庆油田公司采油工程研究院,黑龙江大庆163453

出　　处：《中国石油大学学报（自然科学版）》2011年第5期120-124,共5页Journal of China University of Petroleum(Edition of Natural Science)

摘　　要：地面驱动螺杆泵采油技术在大庆油田深井、三元复合驱油井应用时,负载扭矩出现大幅度周期波动,出现系统杆断、脱胶等问题,免修期很短。建立螺杆泵系统黏滑物理模型,推导黏滑发生的临界速度,提出防治措施并分析现场实施效果。研究表明:螺杆泵负载扭矩波动是由于金属转子和橡胶定子静摩擦系数明显大于动摩擦系数或者在动摩擦系数随时间的变化率在某个转速下为负值时,系统在恒定驱动扭矩及转速下产生的一种黏滑现象;螺杆泵系统黏滑现象对现场设备危害大,可以通过降低黏滑发生的临界速度解决。The ground drive screw pump systems used in deep wells and ASP flooding wells suffered from severe torque oscillation and resulted in the rod and pump stator earlier fatigues and lower running lives in Daqing Oilfield. A model of stickslip phenomenon of the pump system was developed and critical speed was derived. The precautions of the stick-slip phenomenon and the trial results were also given. The results show that when the static friction coefficient of the metal rotor and rubber stator of a pump is greater than its dynamic sliding friction coefficient or the rate of the dynamic sliding friction coefficient change is negative, stick-slip phenomenon may be induced in the screw pump system with the constant driving torque and rotation. The stick-slip phenomenon of pump screw system has a large damage to on-site equipment. It can be solved by reducing the critical stick-slip speed.

关 键 词：螺杆泵 扭矩波动 摩擦 黏滑 机制 

分 类 号：TE933.3[石油与天然气工程—石油机械设备]