摘要
针对海上油田开采水力提升流速过小或生产暂停等极端工况,管道内难以过滤的极细颗粒存在沉积、密实甚至堵塞风险,进行了不同浓度的细颗粒石英砂在管道内低水力提升流速与静水沉降特性实验研究。通过与现有理论对比发现,低浓度极细颗粒在实验中的沉降速度普遍大于现有针对规则颗粒的理论沉速;高浓度颗粒的低水流流速携砂过程及沉积密实结果与颗粒粒径关系较密切。
When the velocity of hydraulic lifting is too small or the production of offshore oilfield was suspended,the risk of sedimentation,consolidation and even blockage of the ultra-fine particles which were difficult to filter in the pipeline is big. Low velocity of hydraulic lifting and the characteristics of hydrostatic sedimentation were studied in this paper based on fine quartz sands of different concentrations in the pipeline. Compared with the existing theory,the study shows the settling velocity of the ultra-fine particles of low concentration in the experiment is universally larger than theoretical settling velocity of the regular shape. And the process of low water flow velocity of particles of high concentration carrying sand and the result of deposit consolidation are closely relevant to the particle sizes.
出处
《管道技术与设备》
CAS
2017年第6期11-15,共5页
Pipeline Technique and Equipment
基金
中央高校基本科研业务费专项资金资助(14CX02207A
17CX05006)
关键词
极端工况
细颗粒
两相流
沉积
堵塞
extreme working conditions
fine particles
two-phase flow
sedimentation
blockage
