摘要
鉴于有杆抽油泵系统的抽油杆断脱、偏磨事故时有发生,现有无杆抽油泵存在结构复杂、运行不平稳、采出液与动力液混合等缺陷,设计了一种新型抽油泵。该泵由地面液压系统对泵体中心管内的动力液加压、卸压,通过与碟簧的共同作用控制橡胶囊的胀缩,实现举油功能,且可有效避免动力液与采出液混合现象的发生。详细阐述了该泵的结构组成及工作原理,通过建立等效模型、拟合橡胶囊排液曲线观测橡胶囊的排液趋势,以期寻找出地面液压系统的合理换向加压点,为确定恰当的冲次提供理论依据,并深入分析该泵的理论排量。最后,根据该泵的自身特性及下泵过程中可能出现的问题提出具体的连接方式,以期指导实际的工程应用。
The rod parting and rod eccentric wear of the sucker rod often occur in the sucker rod pump system and the rodless pump is complex in structure and can't run steadily.Besides,the produced fluid and power fluid often mix together in rodless pump system.In order to avoid the shortcomings mentioned above,a new defueling pump is designed.The power fluid in the central tube of this new pump is compressed and decompressed by the surface control system,and it can lift crude oil by the swell-shrink of the rubber diaphragm with the combined action of mechanical spring,so it can avoid the mixing of power fluid and produced fluid effectively.The structure and working principle of this pump are elaborated in detail.The equivalent model is established,and the rubber sac drainage curve is fitted to observe the trend of the rubber capsule drainage.Thus,the point of compression change of the surface control system can be found.This can offer a theoretical basis for the proper flush times and the theoretical flow rate are analyzed.At last,the specific connecting method is proposed according to the characteristics of the pump and the possible problems in the lay down processes of the pump,with the purpose of guiding the practical engineering application.
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第5期161-166,共6页
Journal of Southwest Petroleum University(Science & Technology Edition)
关键词
液力
抽油泵
碟形弹簧
抽油杆
隔膜式
磨损
hydraulic
defueling pump
disc springs
sucher rod
diaphragm
wear
