| 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。 |
| 关键词: 螺杆泵 扭矩波动 摩擦 黏滑 机制 |
| DOI：10.3969/j.issn.1673-5005.2011.05.022 |
| 分类号::TE 933.3 |
| 文献标识码:A |
| 基金项目: |
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| Oscillation mechanism of ground drive screw pump load torque |
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YANG Yong hua1,2, ZHENG Xue cheng3
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(1.College of Petroleum Engineering in China University of Petroleum, Beijing 102249,China;2.Quality Management & Energy Conservation Department, Daqing Oilfield Limited Company, Daqing 163412, China;3.Oil Production Technology Institute, Daqing Oilfield Limited Company, Daqing 163453,China)
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| Abstract: |
| 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 stick slip 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. |
| Key words: screw pump torque oscillation friction stick slip mechanism |
