Modelling and dynamic analysis of an anti-stall tool in a drilling system including spatial friction

Roeland Wildemans (Corresponding author), Arviandy Aribowo, Emmanuel Detournay, Nathan van de Wouw

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This paper investigates the effects of a down-hole anti-stall tool (AST) in deviated wells on the drilling performance of a rotary drilling system. Deviated wells typically induce frictional contact between the drill-string and the borehole, which affects the drill-string dynamics. In order to study the influence of such frictional effects on the effectiveness of the AST in improving the rate-of-penetration and drilling efficiency, a model-based approach is proposed. A dynamic model with coupled axial and torsional dynamics of a drilling system including the down-hole tool in an inclined well is constructed. Furthermore, the frictional contact between the drill-string and the borehole is modelled by a set-valued spatial Coulomb friction law affecting both the axial and torsional dynamics. These dynamics are described by state-dependent delay differential inclusions. Numerical analysis of this model shows that the rate-of-penetration and drilling efficiency increases by inclusion of the AST, both in the case with and without spatial Coulomb friction. Furthermore, a parametric design study of the AST in different inclined drilling scenarios is performed. This study reveals a design for the AST, which gives optimal drilling efficiency, robustly over a broad range of inclined drilling scenarios.

Originele taal-2Engels
Pagina's (van-tot)2631-2650
Aantal pagina's20
TijdschriftNonlinear Dynamics
Volume98
Nummer van het tijdschrift4
Vroegere onlinedatum27 jun 2019
DOI's
StatusGepubliceerd - 1 dec 2019

Vingerafdruk

Drilling
Dynamic Analysis
Dynamic analysis
Friction
Drill strings
Modeling
Inclined
Coulomb Friction
Frictional Contact
Strings
Boreholes
Penetration
Parametric Design
State-dependent Delay
Scenarios
Differential Inclusions
Numerical analysis
Numerical Analysis
Dynamic models
Dynamic Model

Citeer dit

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title = "Modelling and dynamic analysis of an anti-stall tool in a drilling system including spatial friction",
abstract = "This paper investigates the effects of a down-hole anti-stall tool (AST) in deviated wells on the drilling performance of a rotary drilling system. Deviated wells typically induce frictional contact between the drill-string and the borehole, which affects the drill-string dynamics. In order to study the influence of such frictional effects on the effectiveness of the AST in improving the rate-of-penetration and drilling efficiency, a model-based approach is proposed. A dynamic model with coupled axial and torsional dynamics of a drilling system including the down-hole tool in an inclined well is constructed. Furthermore, the frictional contact between the drill-string and the borehole is modelled by a set-valued spatial Coulomb friction law affecting both the axial and torsional dynamics. These dynamics are described by state-dependent delay differential inclusions. Numerical analysis of this model shows that the rate-of-penetration and drilling efficiency increases by inclusion of the AST, both in the case with and without spatial Coulomb friction. Furthermore, a parametric design study of the AST in different inclined drilling scenarios is performed. This study reveals a design for the AST, which gives optimal drilling efficiency, robustly over a broad range of inclined drilling scenarios.",
keywords = "Drill-string dynamics, Set-valued force laws, Spatial Coulomb friction, State-dependent delay differential inclusions",
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Modelling and dynamic analysis of an anti-stall tool in a drilling system including spatial friction. / Wildemans, Roeland (Corresponding author); Aribowo, Arviandy; Detournay, Emmanuel; van de Wouw, Nathan.

In: Nonlinear Dynamics, Vol. 98, Nr. 4, 01.12.2019, blz. 2631-2650.

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

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