关键词: 吉林油田, 浅层定向井, 螺杆泵, 举升工艺, 优化设计

Abstract: The progressing cavity pump (PCP) lifting technique has been widely applied to oilfield development all over the world in recent years. But it is only applied to the straight wells and straight-deflecting wells. The design theory or field application of this technique is in fumble stage for directional well,especially for shallow directional well. In order to meet the field requirement of PCP lifting technique in the shallow directional well in Jilin Oilfield,the problem of abrasion prevention for lifting device was discussed. The rod-pipe uneven abrasion mechanism and influence factors for abrasion degree were analyzed. The basic countermeasures for reducing rod-pipe pressure and uneven abrasion degree were put forward. It is suggested that the major measures should include optimizing the design of centralizer and applying glass-liner tube. The field application of improved technique showed that the PCP lifting technique is effective in shallow directional wells.

Key words: Jilin Oilfield, shallow directional well, progressing cavity pump, lifting technique, optimization design