Semi-analytical model of the axial movements of an oil-well drillstring in deviated wellbores

Hovda, Sigve

doi:10.1016/j.jsv.2018.07.016

Cited by 12 publications

(13 citation statements)

References 18 publications

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“…Viscous damping is included to simulate the dissipation of energy in the vibrating body. The viscous damping in vertical wells includes the effect of drilling mud between the borehole and string [11]. The damping matrix is defined as D = diag(R 1 , R 2 , .…”

Section: Non-conservative Forcesmentioning

confidence: 99%

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Component-Based Modeling and Simulation of Nonlinear Drill-String Dynamics

Tengesdal

Holden

Pedersen

2021

Journal of Offshore Mechanics and Arctic Engineering

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In this paper, we present a dynamic model for a generic drill-string. The model is developed with the intention for component-based simulation with coupling to external subsystems. The performance of the drill-string is vital in terms of efficient wellbore excavation for increased hydrocarbon extraction. Drill-string vibrations limit the performance of rotary drilling; the phenomenon is well-known and still a subject of interest in academia and in industry. In this work, we have developed a nonlinear flexible drill-string model based on Lagrangian dynamics, to simulate the performance during vibrations. The model incorporates dynamics governed by lateral bending, longitudinal motion and torsional deformation. The elastic property of the string is modeled by the assumed mode method, representing the elastic deformation, with a finite set of modal coordinates. By developing a bond graph model from the equations of motion, we can ensure correct causality of the model towards interacting subsystems. The model is analyzed through extensive simulations in case studies, comparing the qualitative behavior of the model with state-of-the art models. The flexible drill-string model presented in this paper can aid in developing system simulation case studies and parameter identification for offshore drilling operations.

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Section: Non-conservative Forcesmentioning

confidence: 99%

“…Hovda [11] presents an axial model of a drill-string assembly with a finite number of discrete mass-spring-damper elements. Unlike the above-mentioned work, this model incorporates the skin-friction arising from the mud-flow in the annulus of the well.…”

Section: Introductionmentioning

confidence: 99%

Component-Based Modeling and Simulation of Nonlinear Drill-String Dynamics

Tengesdal

Holden

Pedersen

2021

Journal of Offshore Mechanics and Arctic Engineering

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“…In Hovda, 6 axial vibrations of a vertical wellbore are described, while the axial vibrations of a deviated wellbore while reaming are outlined in Hovda. 7 A model for the torsional vibrations is presented in Hovda. 8 These semi-analytical models are particularly suited for a switching model approach, since they can include three-dimensional wellbore geometries and nonhomogeneous pipe sizes.…”

Section: Introductionmentioning

confidence: 99%

Multi-dimensional semi-analytical model for axial stick–slip of a rod sliding on a surface with Coulomb friction

Hovda

2019

Advances in Mechanical Engineering

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A multi-dimensional lumped element model of a long non-rotating rod that moves on a slick surface with both dynamic and static Coulomb friction is outlined. The rod is accelerated to a constant velocity, and the free end of the rod experiences the effect of stick and slip. This article describes a new modeling approach, where the model is able to switch between different linear semi-analytical sub-models, depending on how much of the rod is moving. Fundamental understanding of the stick-slip effect is revealed, and a potential shortcoming of the model is also discussed. The model is computationally effective and may be suitable for real-time applications in, for instance, oil-well drilling.

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“…A lumped parameter formulation is also used in [12] to tackle the torsional vibrations and instabilities of a drillstring including a nonlinear velocity-dependent friction torque representing the bit-rock interaction. Recently, this discrete approach was employed to study the axial motion of a drill-sting in a curved borehole in [13].…”

Section: List Of Tablesmentioning

confidence: 99%

“…A definition of the directors in the current configuration is given in terms of quaternion components in (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18). Those components need to fulfil the relation (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19), which imposes a constraint that guarantees that the quaternion is unitary.…”

Section: The Angular Velocity In Terms Of Quaternion Componentsmentioning

confidence: 99%

Cosserat Rods and Their Application to Drill-String Dynamics

Manuel¹

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I would like start by thanking my current advisors, Fernando Buezas and Roberta Lima, for their guidance and contributions that helped make possible this thesis. I am also grateful for the guidance provided by Prof. Marta Rosales, now retired from teaching, who helped me initiate into the world of research as a pre-graduate student and then, together with Fernando, directed my first years as a Ph.D student. I would also like to say that it has been a true pleasure working with her. Last but not least, I am grateful for having met Prof. Rubens Sampaio, who made my stay at PUC-Rio possible and invited me to take part of his research group in the Laboratory of Vibrations, where I met Roberta. The talks and discussions with Rubens often gave new ideas on ways to improve and continue my research. Also, all the conversations on random topics like economy, politics and leisure activities were always interesting. I am grateful to my parents, that have supported me in this quest, both by lending an ear and economically, when it was required. Finally, I would like to thank my colleagues and friends, from both Argentina and Brasil, for all the discussions, the help, and the little things that make our daily life more entertaining.

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Semi-analytical model of the axial movements of an oil-well drillstring in deviated wellbores

Cited by 12 publications

References 18 publications

Component-Based Modeling and Simulation of Nonlinear Drill-String Dynamics

Component-Based Modeling and Simulation of Nonlinear Drill-String Dynamics

Multi-dimensional semi-analytical model for axial stick–slip of a rod sliding on a surface with Coulomb friction

Cosserat Rods and Their Application to Drill-String Dynamics

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