稠油潜油电泵工作寿命影响因素分析及治理

针对塔河油田采油二厂稠油潜油电泵工作寿命短的问题,通过对躺井电泵进行拆检分析,结合稠油物性、实测温度场数据及前期电泵系统的技术参数,查找出造成稠油潜油电泵短寿的6个因素为:电泵系统耐温不足、保护器稠油适应性差、离心泵轴系结构缺陷及强度不足、选型设计不合理、电泵系统散热差及稀稠油混配效果差。通过潜油电泵机组技术改进、电缆改进、电泵配套优化及电泵举升配套工艺优化4个方面对稠油潜油电泵系统进行了优化改进,稠油潜油电泵躺井率、故障停机井次大幅度下降,工作寿命明显提高,为油田的正常生产提供了保障。

Analysis and treatment of working life factors for heavy oil electric submersible pump

In view of the problem of short service life of electric submersible pumps in No. 2 Oil Production Plant of Tahe Oilfield, through analysis of electric pumps in shut-in wells by dismantling the pumps, and in conjunction with physical properties of heavy oil, measured temperature field data and technical parameters of previous electric pump systems, it was found that there are six factors causing short service life of electric submersible pumps for heavy oil inadequate heat-resistance of electric pump system; poor suitability of protector for heavy oil; defects of centrifugal pump shafting system and inadequate strength; improper model and design; poor heat radiation of the electric pump system; and poor effectiveness of mixing of thin and thick oils. The electric submersible pump for heavy oil was optimized and improved in terms of improvement of the technology of electric submersible pump for heavy oil, improvement of electric cable, optimization of auxiliaries of electric pump and optimization of matching technology of electric pump lifting. The well shut-in rate due to electric submersible pump and the number of wells shut in due to pump failure reduced greatly; the service life of the pumps increased evidently, providing a guarantee for normal production of the oilfield.