A new type of fluid wall attached self-excited hydraulic oscillator and its jet oscillation characteristics

被引：0

作者：

Abulimiti A. ^{[1
,2
]}

Liu Y. ^{[1
]}

Pang D. ^{[2
]}

Jiao W. ^{[2
]}

Guo X. ^{[2
]}

机构：

[1] College of Mechanical and Electronic Engineering, China University of Petroleum (East China), Qingdao

[2] Xinjiang Oilfield Company, PetroChina, Karamay

来源：

Zhendong yu Chongji/Journal of Vibration and Shock | 2022年 / 41卷 / 17期

关键词：

full scale test; onsite application; self-excited pulse; sensitivity analysis; wall attachment effect;

D O I：

10.13465/j.cnki.jvs.2022.17.024

中图分类号：

学科分类号：

摘要：

Here, to reduce friction between drill string and well wall during drilling, effectively improve phenomena of supporting pressure and sticking, and improve effective WOB, a fluid wall attached self-excited hydraulic oscillator was designed, it could make drill string have periodic axial vibration, change friction form between drill string and well wall, and improve operation efficiency. The principle of the device was described with theoretical analysis and numerical simulation. The mechanical model of string friction force under axial vibration was established by using theoretical mechanics analysis and MATLAB programming method. The parametric sensitivity of oscillator was analyzed by using finite element numerical simulation method, and vibration characteristics of the device under different output volumes were measured and analyzed with full-scale physical model tests. The vibration drag reduction effect of the device was verified in application of coiled tubing deepening drilling engineering. The results showed that the inlet-outlet ratio is more sensitive to change of inlet pressure of the device, and cavity length and output volume of oscillation cavity are more sensitive to inlet pressure and frequency of the device; changes of inlet-outlet ratio and output volume affect obviously drag reduction efficiency, inlet-outlet ratio is negatively correlated to drag reduction efficiency, and output volume is positively correlated to drag reduction efficiency; extreme value and amplitude of inlet pressure of the device increase with increase in output volume, and axial vibration displacement amplitude of the device is positively correlated to pump output volume; the device can increase footage speed of coiled tubing drilling by 128.6%, and the speed-up effect is obvious; the study results can provide a basis for industrial application of fluid wall attached self-excited hydraulic oscillator. © 2022 Chinese Vibration Engineering Society. All rights reserved.

引用

页码：193 / 203

页数：10

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