Characterization of a novel fluidic friction-reduction tool used in extended-reach well considering periodic particle-laden jet  

作　　者：Lu-Bo Tang Xiao-Bin Chen Wei-Wei Xin Shao-He Zhang Xin-Xin Zhang 

机构地区：[1]School of Civil Engineering,Central South University,Changsha,410083,Hunan,China [2]Jiangxi Geological Exploration Bureau for Non-ferrous Metals,Nanchang,330000,Jiangxi,China [3]Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring(Central South University),Ministry of Education,Changsha,410083,Hunan,China [4]School of Geosciences and Info-Physics,Central South University,Changsha,410083,Hunan,China

出　　处：《Petroleum Science》2023年第6期3700-3711,共12页石油科学（英文版）

基　　金：funded by the National Key Research and Development Program of China under grant number 2020YFC1807200;the National Natural Science Foundation of China under grant number 41872186;the National Natural Science Foundation of China(Grant number 51978674)。

摘　　要：Fluidic oscillators(FOs)can be used as an efficient fluidic vibration tool to solve high friction problems in extended-reach wells.However,the complex mechanism of FOs makes the design challenging,and the dynamic erosion behavior inside FOs is still unclear.In this paper,new FOs are proposed and the working characteristics under the influence of periodic particle-laden jets are investigated.Firstly,the results reveal the working mechanism of new FOs,showing that the generation of pressure pulses is closely connected with periodic jet switching and the development of vortices.Secondly,the important performance parameters,i.e.,pressure pulse and oscillation frequency,are extensively studied through numerical simulation and experimental verification.It is found that the performance can be optimized by adjusting the tool structure according to different engineering requirements.Finally,the oscillating solid-liquid two-phase flow inside FO is studied.It is demonstrated that the accumulation of particles leads to a significant reduction in performance.The results also reveal five locations that are susceptible to erosion and the erosion behavior of these locations are studied.It has been shown that the periodic jet causes fluctuations in the amount of erosion at the outlet and splitter.This research can provide valuable references for the design and optimization of vibration friction-reduction tools.

关 键 词：Extended-reach well Fluidic oscillator Vibratory tool EROSION Friction reduction 

分 类 号：TE24[石油与天然气工程—油气井工程]