西南石油大学学报（自然科学版）2016，Vol.38Issue(3)：135-143,9.DOI:10.11885/j.issn.1674-5086.2014.02.20.01
钻井环空中赫巴流体内气泡的上升速度
Bubble Rise Velocity in Herchel-Bulkley Fluid of Drilling Annulus
摘要
Abstract
Bubble motion laws in drilling annulus is an important part of borehole multiphase flow research. Among which bubble rise velocity is a key parameter. The accuracy of borehole multiphase flow description highly depends on the accuracy of bubble/gas rise velocity of each flow pattern. In the view of this,according to the void fraction,the drilling annulus flow is divided into four patterns and then the analysis of bubble or gas motion characteristic of every pattern is carried out. The calculation methods of single bubble slip velocity and aspect ratio in Infinite media are summarized. Apparent viscosity round bubbles has been corrected through the Herchel-Bulkley reheology model. Through the contrastive analysis of case study among several formulas of single bubble′s slip velocity in Herchel-Bulkley fluid,the Rodrigue′s formula is considered as an improvement compared to the Harmathy′s formula and can be the optimal formula of bubble rise velocity in bubbly flow pattern. The modification of calculation formulas of bubble slip velocities with regard to void fraction,bubble size and the angle of borehole has been adopted to correct the slip velocities in four flow patterns. For the bubble slip velocity in the transforming pattern,the liner method is proposed. The case study is applied in the relationship between bubble rise velocity and void fraction. Finally,bubble rise velocity can be acquired through the method of drift model.关键词
钻井环空流型/赫-巴流体/气泡滑脱速度/漂移流模型/气泡上升速度Key words
flow pattern in driling annulus/Herchel-Bulkley fluid/bubble slip velocity/drift model/bubble rise velocity分类
能源科技引用本文复制引用
尹浚羽,周英操,张辉,蒋宏伟,朱磊..钻井环空中赫巴流体内气泡的上升速度[J].西南石油大学学报（自然科学版）,2016,38(3):135-143,9.基金项目
国家科技重大专项（2016ZX05020006）。 （）
