Axial laminar velocity field calculation and optimization for power-law fluid in eccentric annulus with cutting bed  

作　　者：Yong-hai Gao Ye Chen De-jun Cai Hua-qing Liu Cheng-gui Liu Qing-yong Li 高永海;陈野;蔡德军;刘华清;刘承贵;李庆永(School of Petroleum Engineering,China University of Petroleum（East China）,Qingdao 266580,China;National Engineering Laboratory for Testing and Detection Technology of Subsea Equipments,Qingdao 266101,China;Drilling Department,CNPC Offshore Engineering Company Limited,Tianjin 300280,China)

机构地区：[1]School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China [2]National Engineering Laboratory for Testing and Detection Technology of Subsea Equipments, Qingdao 266101, China [3]Drilling Department, CNPC Offshore Engineering Company Limited, Tianjin 300280, China

出　　处：《Journal of Hydrodynamics》2018年第5期943-949,共7页水动力学研究与进展B辑（英文版）

基　　金：Project supported by the National Science and Technology Major Project(Grant No.2016ZX05020-006);the National Natural Science Foundation of China(Grant No.U1762216);the National Key Basic Research Development Program of China(973 Program,Grant No.2015CB251200);the National Key Research and Development Program of China(Grant No.2017YFC0307304)

摘　　要：The formation of a cutting bed in an annulus involves safety problems in drilling especially in the horizontal well and the directional well. In this work, three axial laminar velocity field calculation models for the power-law fluid in an annulus are modified by considering the effect of the cutting bed. The proposed models are employed to numerically simulate the annulus flow with the cutting bed. Verified by the experimental data in literature, all of them can be applied to the situation of the annulus flow with the cutting bed. The modified concentric annulus model enjoys the best performance, while the flat channel flow model has the worst performance.The formation of a cutting bed in an annulus involves safety problems in drilling especially in the horizontal well and the directional well. In this work, three axial laminar velocity field calculation models for the power-law fluid in an annulus are modified by considering the effect of the cutting bed. The proposed models are employed to numerically simulate the annulus flow with the cutting bed. Verified by the experimental data in literature, all of them can be applied to the situation of the annulus flow with the cutting bed. The modified concentric annulus model enjoys the best performance, while the flat channel flow model has the worst performance.

关 键 词：Eccentric annulus power-law fluid axial laminar velocity field cutting bed 

分 类 号：TE92[石油与天然气工程—石油机械设备] O373[理学—流体力学]