Vibration characteristics of the stepped drill string subjected to gas-structure interaction and spinning motion

Chang, Xueping; Li, X.; Yang, Lin; Li, Y.H.

doi:10.1016/j.jsv.2019.02.003

Cited by 20 publications

(3 citation statements)

References 39 publications

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“…It is mentioned that the influence of the drilling fluid is greater in comparison with natural gas. The article [8] examines a drilling system consisted of drill pipes and drill collars with two different cross-section areas under gas-structure interaction, studies its vibration characteristics and the combined effects of multiple factors.…”

Section: Introductionmentioning

confidence: 99%

Development of a software module for modeling drill string displacements

Kudaibergenov

2023

JMMCS

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In this work, a software module for calculating drill string displacements taking into account the effect of a drilling fluid flow, external loads and the intermittent contact of the drill string with the borehole wall is developed. A generalized nonlinear mathematical model of the drill string spatial lateral vibrations underlies the module. The V.V. Novozhilov nonlinear elasticity theory and the Ostrogradsky-Hamilton variation principle were used to derive the mathematical model. To create the software module, the universal Wolfram Language with integrated computational intelligence is utilized. The functions for performing 2D visualization of the drill string spatial displacements, constructing phase portraits of the solution and conducting the comparative analysis of the obtained numerical results are included into the module. The developed module allows predicting the dynamics of the drill string before the beginning of well drilling due to the possibility of presetting the parameters of the drilling system and accounting for the environmental factors in the process of modeling for ensuring quick, safe and efficient exploration and production of natural resources.

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Section: Introductionmentioning

confidence: 99%

Development of a software module for modeling drill string displacements

Kudaibergenov

2023

JMMCS

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“…In the buckling analysis, they also studied the effect of fluid density on buckling. However, they did not study the effect of damping on stability analysis and multiple lateral contacts [20,21]. Ritto et al analyzed the effect of mud flow on the natural frequency and dynamic behavior of the drill string.…”

Section: Introductionmentioning

confidence: 99%

Bifurcation Diagram and Dynamic Response of a Drill String Applied in NGH Drilling

Wang

Liu

et al. 2022

Processes

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Natural gas hydrate (NGH) is a kind of unique resource among hydrocarbon fuels. It is stable within its sedimentary hosts and will only convert to its constituent gas and water phases relatively quickly if reservoir pressure-temperature conditions are artificially disturbed. The unwanted vibrations from the drill string with the complex external environment and excitation usually cause instability in the NGH. In this paper, a nonlinear mathematical model is presented taking into account the fluid–solid coupling vibration caused by the drilling fluid inside and outside the drill string, the non-smooth rub-impact between the drill string and borehole wall, and the influence of centralizer setting interval on nonlinear resonant vibration of the drill string. The relationship between the variable parameters of the drill string and the complex dynamics of the drill string is analyzed. Finally, the bifurcation diagram is given. The results show that the system response exhibits complex dynamic behavior due to rub-impact and nonlinear effects. However, there is always a suitable parameter in the bifurcation diagram of each parameter change, so that the amplitude of the system is small and the failure probability of the drill string is reduced. The research results have reference significance for exploring the nonlinear dynamic mechanism of a drill string under complex working conditions and reasonably optimizing drilling parameters.

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“…Scholars have studied dynamic characteristics of the drilling string under fluid-structure interaction from different angles. Chang et al [3] and David Ytrehus et al [4]investigated the effect of different types of drilling fluids on the vibration characteristics of the drill string. Salehi and Moradi [5], Tran et al [6], Ma et al [7], and Chen et al [8] studied the effects of density, flow rate, frequency, and other parameters of drilling fluid on the drill string vibration characteristics.…”

Section: Introductionmentioning

confidence: 99%

Effect of Annular Gas‐Liquid Two‐Phase Flow on Dynamic Characteristics of Drill String

Wang

et al. 2021

Shock and Vibration

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Natural gas hydrate (NGH) is a kind of new type green energy source with giant reserves which has been thought of highly by energy explorers in the world. However, NGH breaks down to produce some natural gas that enters the annulus and flows together with the drilling fluid. The gas-liquid two-phase flow can have an impact on the work of the drill string. Therefore, it is important to study gas-liquid two-phase flow in the annulus on the dynamic characteristics of the drill string. In this article, taking a single drill string as the research object, a fluid-structure coupled finite element mathematical model of two-phase flow in the annulus and drill string is established based on computational fluid dynamics and computational structural dynamics theory. The finite element numerical simulation method is used to analyze the influence of drilling fluid and natural gas in the annulus on the dynamic characteristics of the drill string. The simulation analysis shows the following: (1) The motion of drilling fluid or natural gas in the annulus will reduce the natural frequency of the drill string, and the drilling fluid has a greater impact on the natural frequency of the drill string. (2) When single-phase drilling fluid flows in the annulus, the displacement peak in different directions, maximum equivalent stress, and strain of the drill string increase with the increase of the drilling fluid flow velocity or pressure, and the drilling fluid pressure has a more significant effect. (3) When the gas-liquid two-phase fluid flows in the annulus, the displacement peak, maximum equivalent stress, velocity amplitude, and acceleration amplitude of the drill string all increase with the natural gas flow velocity and natural gas content increase, and the natural gas flow velocity has a more significant effect.

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Vibration characteristics of the stepped drill string subjected to gas-structure interaction and spinning motion

Cited by 20 publications

References 39 publications

Development of a software module for modeling drill string displacements

Development of a software module for modeling drill string displacements

Bifurcation Diagram and Dynamic Response of a Drill String Applied in NGH Drilling

Effect of Annular Gas‐Liquid Two‐Phase Flow on Dynamic Characteristics of Drill String

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