等壁厚定子螺杆泵节能效果分析

The Energy Saving Effort of Even Wall Stator PCP

自1980年引进螺杆泵采油技术以来,大庆油田螺杆泵井已经达到8000口以上,配套的生产动态监测等配套技术实现了逐步完善。现场应用结果表明,螺杆泵在应用超过500天后泵效下降幅度较大,出现了调整工作转速后增产效果差的问题。通过分析制约螺杆泵井系统效率的主要因素,得出泵效下降的主要原因是螺杆泵定子衬套的橡胶层工作性能变差,导致定转子之间的漏失量增加引起的。通过改变螺杆泵定子外壳的形状,研制了等壁厚定子螺杆泵。这种螺杆泵定子衬套的橡胶层厚度处处相等,大幅度降低了由于橡胶温、溶胀引起的形变幅度,提高了螺杆泵的工作性能,系统效率上升5个百分点,节电率达到18.5%,取得了良好的节能效果。

Since PCP technology has been introduced from abroad in 1980 th, the number of PCP wells has urgent increased to above 8000 in Daqing Oilfield. A series of supporting technology has formed, including production dynamic monitoring etc. The application of PCP performance indicates that the pump efficiency has greatly dropped when pump was running over 500 days, and it will lead to poor stimulate effort after adjusting operating speed. The analysis of PCP system efficiency shows that it is mainly result from the poor performance of elastomer of pump stator which led to severe leakage between rotor and stator. By changing the shape of PCP stator, an even wall stator PCP was developed. The pump has many advantage features such as the thickness of elastomer liner equals everywhere, the deformation of elastomer swelling has greatly decreased, the pump performance improved. The application of even wall stator PCP has gained good efforts, the system efficiency has increased by 5%, the rate of saving energy reaches to 18.5 %.