摘要
有杆泵机采系统中和点下部杆柱的失稳弯曲会造成杆管泵之间的偏磨。杆柱底部加重并配套扶正器可以在一定程度上缓解中和点至滑杆间杆管的偏磨,但是滑杆自身以及柱塞偏磨却得不到有效解决。基于此,开展了底部杆柱旋转抗磨工艺技术研究,发明了机械强扭式井下杆柱旋转器。将该旋转器安装在杆柱中和点以下一定位置,通过均置滑块与闭环轨道的精密配合联动机构,依靠上、下交变载荷变抽油杆的直线往复为正向旋转,强制带动工具以下包括柱塞在内的杆柱实现整体旋转抗磨。机械强扭式井下杆柱旋转工艺在现场应用21井次,6井次已收到延长油井免修期效果。其中,沔26斜-3井使用该工艺后减少了柱塞间隙漏失量,日产油由使用前的0.7 t增至1.3 t,日增油0.6 t,有效期68 d,累计增油41 t。
The instability bending of the rod below the neutral point usually lead to the eccentric wear of the rod pump. Increasing the weight of the rod bottom combined with centralizers could, in some degree, reduce the eccentric wear of the rod between the neutral point and the sliding rod, but the eccentric wear of the sliding rod and the plunger could not be effectively addressed. Thus, the rotating anti-wear technology of the lower rod is stud- ied and the mechanical downhole rod rotator is developed. The mechanical downhole rod rotator is positioned below the neutral point. Through the sliding block and the closed loop track, the linear reciprocating is turned to a posi- tive rotation by the up and down alternating load change, thus forcing the overall rod below the tool including the plunger to move in an anti-wear way. The mechanical downhole rod rotator is applied in 21 wells, of which 6 wells have been extended the exemption. After the application of the technology, the well Mian 26xie-3 reduce the leak- age of the plunger gap, increasing the daily oil production by 0. 6 t from 0. 7 t to 1.3 t with the period of validity of 68 d and the cumulative oil of 41 t.
出处
《石油机械》
北大核心
2014年第12期79-82,共4页
China Petroleum Machinery
基金
中国石油化工集团公司科研项目"抽油井有杆泵防断关键技术研究"(080-K2-B)的部分研究成果。一种机械强扭式井下杆柱旋转器已获国家实用新型专利
专利号:ZL 201320579028.6
关键词
偏磨
旋转器
砂卡
泵漏
杆柱中和点
交变载荷
eccentric wear
rotator
sand plug
pump leakage
rod string neutral point
alternating load
