Implementation of a Nesting Repair Technology for Transportation Pipeline Repair  

作　　者：Yijun Gao Yong Wang Qing Na Jiawei Zhang Aixiang Wu 

机构地区：[1]School of Civil&Resource Engineering,University of Science and Technology Beijing,Beijing,100083,China [2]Anhui Magang Luohe Mining Industry Co.,Ltd.,Hefei,231500,China

出　　处：《Fluid Dynamics & Materials Processing》2024年第11期2443-2458,共16页流体力学与材料加工（英文）

基　　金：supported by the State Key Research Development Program of China(2018YFC0603705);the Fundamental Research Funds for the Central Universities(FRF-IDRYGD22-004).

摘　　要：Filling methods in the mining industry can maximize the recovery of mineral resources and protect the underground and surface environments.In recent years,such methods have been widely used in metal mines where pipeline transportation typically plays a decisive role in the safety and stability of the entirefilling system.Because thefilling slurry contains a large percentage of solid coarse particles,the involved pipeline is typically eroded and often damaged during such a process.A possible solution is the so-called nesting repair technology.In the present study,nesting a 127 mm outer diameter pipeline in 151 mm inner diameter borehole is considered to meet the repair objective.First,by using the rheological theory,the pipeline transmission resistance and self-flow conveying range are calculated under different working conditions.It is shown that the pipeline transmission resistance is larger when the inner diameter of casing is 80 mm,and the limitflow rate of vertical pipeline self-flow is 120 m^(3)/h;moreover,when the pipeline diameter is 100 mm and theflow rate is 140 m^(3)/h,the self-flow conveying can be satisfied in most of the underground−455 m stage.Accordingly,a plan is presented for the nesting repair strategy,based on the installation of a drill bit under the casing and lowering the casing into the borehole as if it were a drill pipe.Finally,the outcomes of such a strategy are verified.Thefillingflow rate range using the new pipelines is found to be in the range from 188.60 to 224.39 m^(3)/h,and its averagefillingflow rate reaches 209.83 m^(3)/h when conveying 2319.6 m long-distance quarry.

关 键 词：BOREHOLE nesting repair pipeline transmission resistance flow rate 

分 类 号：TE973[石油与天然气工程—石油机械设备]