Drill string dynamics: Reduced-order models

Chien Min Liao, Mansour Karkoub, Balakumar Balachandran

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Research efforts are underway to model and study the dynamics of a drill string, and preliminary results are presented in this work. The dynamics of a drill string system has nonsmooth characteristics. Moreover, the drill string system dynamics exhibits qualitative changes with respect to the rotation speed of the drill string and friction coefficients associated with the contact between the drill string and the outer shell and the drill string and the well bottom. The coupling between torsion, lateral, and axial vibrations and the nonlinear interactions between them need to be investigated to better understand the dynamic behavior of the drill string system. As a preliminary step towards understanding the dynamics of the drill string, four-degree-of-freedom models are developed for the system by using two rotating sections: an inner stator that can undergo radial displacements and an outer rotor. Stickslip interactions between the drill string and the outer shell are also considered in the model development. Two sets of differential equations are obtained for the system by using displacements and momenta as system states in one model and displacements and velocities as system states in another model. For different values of friction coefficients, rotation speeds, and rotation torques, the results obtained by using the developed models are presented., discussed, and compared with experimental results.

Original languageEnglish
Title of host publicationProceedings of the ASME International Mechanical Engineering Congress and Exposition 2009, IMECE 2009
PublisherAmerican Society of Mechanical Engineers (ASME)
Pages451-460
Number of pages10
Volume10
EditionPART A
ISBN (Print)9780791843833
DOIs
Publication statusPublished - 2010
Externally publishedYes
EventASME 2009 International Mechanical Engineering Congress and Exposition, IMECE2009 - Lake Buena Vista, FL, United States
Duration: 13 Nov 200919 Nov 2009

Other

OtherASME 2009 International Mechanical Engineering Congress and Exposition, IMECE2009
CountryUnited States
CityLake Buena Vista, FL
Period13/11/0919/11/09

Fingerprint

Drill strings
Friction
Degrees of freedom (mechanics)
Torsional stress
Stators
Momentum
Dynamical systems
Differential equations
Torque
Rotors

Keywords

  • Drill string
  • Reduced-order model
  • Stick-slip interactions

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Liao, C. M., Karkoub, M., & Balachandran, B. (2010). Drill string dynamics: Reduced-order models. In Proceedings of the ASME International Mechanical Engineering Congress and Exposition 2009, IMECE 2009 (PART A ed., Vol. 10, pp. 451-460). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/IMECE2009-10339

Drill string dynamics : Reduced-order models. / Liao, Chien Min; Karkoub, Mansour; Balachandran, Balakumar.

Proceedings of the ASME International Mechanical Engineering Congress and Exposition 2009, IMECE 2009. Vol. 10 PART A. ed. American Society of Mechanical Engineers (ASME), 2010. p. 451-460.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Liao, CM, Karkoub, M & Balachandran, B 2010, Drill string dynamics: Reduced-order models. in Proceedings of the ASME International Mechanical Engineering Congress and Exposition 2009, IMECE 2009. PART A edn, vol. 10, American Society of Mechanical Engineers (ASME), pp. 451-460, ASME 2009 International Mechanical Engineering Congress and Exposition, IMECE2009, Lake Buena Vista, FL, United States, 13/11/09. https://doi.org/10.1115/IMECE2009-10339
Liao CM, Karkoub M, Balachandran B. Drill string dynamics: Reduced-order models. In Proceedings of the ASME International Mechanical Engineering Congress and Exposition 2009, IMECE 2009. PART A ed. Vol. 10. American Society of Mechanical Engineers (ASME). 2010. p. 451-460 https://doi.org/10.1115/IMECE2009-10339
Liao, Chien Min ; Karkoub, Mansour ; Balachandran, Balakumar. / Drill string dynamics : Reduced-order models. Proceedings of the ASME International Mechanical Engineering Congress and Exposition 2009, IMECE 2009. Vol. 10 PART A. ed. American Society of Mechanical Engineers (ASME), 2010. pp. 451-460
@inproceedings{6de9df090ee849158ed23b56f465143b,
title = "Drill string dynamics: Reduced-order models",
abstract = "Research efforts are underway to model and study the dynamics of a drill string, and preliminary results are presented in this work. The dynamics of a drill string system has nonsmooth characteristics. Moreover, the drill string system dynamics exhibits qualitative changes with respect to the rotation speed of the drill string and friction coefficients associated with the contact between the drill string and the outer shell and the drill string and the well bottom. The coupling between torsion, lateral, and axial vibrations and the nonlinear interactions between them need to be investigated to better understand the dynamic behavior of the drill string system. As a preliminary step towards understanding the dynamics of the drill string, four-degree-of-freedom models are developed for the system by using two rotating sections: an inner stator that can undergo radial displacements and an outer rotor. Stickslip interactions between the drill string and the outer shell are also considered in the model development. Two sets of differential equations are obtained for the system by using displacements and momenta as system states in one model and displacements and velocities as system states in another model. For different values of friction coefficients, rotation speeds, and rotation torques, the results obtained by using the developed models are presented., discussed, and compared with experimental results.",
keywords = "Drill string, Reduced-order model, Stick-slip interactions",
author = "Liao, {Chien Min} and Mansour Karkoub and Balakumar Balachandran",
year = "2010",
doi = "10.1115/IMECE2009-10339",
language = "English",
isbn = "9780791843833",
volume = "10",
pages = "451--460",
booktitle = "Proceedings of the ASME International Mechanical Engineering Congress and Exposition 2009, IMECE 2009",
publisher = "American Society of Mechanical Engineers (ASME)",
edition = "PART A",

}

TY - GEN

T1 - Drill string dynamics

T2 - Reduced-order models

AU - Liao, Chien Min

AU - Karkoub, Mansour

AU - Balachandran, Balakumar

PY - 2010

Y1 - 2010

N2 - Research efforts are underway to model and study the dynamics of a drill string, and preliminary results are presented in this work. The dynamics of a drill string system has nonsmooth characteristics. Moreover, the drill string system dynamics exhibits qualitative changes with respect to the rotation speed of the drill string and friction coefficients associated with the contact between the drill string and the outer shell and the drill string and the well bottom. The coupling between torsion, lateral, and axial vibrations and the nonlinear interactions between them need to be investigated to better understand the dynamic behavior of the drill string system. As a preliminary step towards understanding the dynamics of the drill string, four-degree-of-freedom models are developed for the system by using two rotating sections: an inner stator that can undergo radial displacements and an outer rotor. Stickslip interactions between the drill string and the outer shell are also considered in the model development. Two sets of differential equations are obtained for the system by using displacements and momenta as system states in one model and displacements and velocities as system states in another model. For different values of friction coefficients, rotation speeds, and rotation torques, the results obtained by using the developed models are presented., discussed, and compared with experimental results.

AB - Research efforts are underway to model and study the dynamics of a drill string, and preliminary results are presented in this work. The dynamics of a drill string system has nonsmooth characteristics. Moreover, the drill string system dynamics exhibits qualitative changes with respect to the rotation speed of the drill string and friction coefficients associated with the contact between the drill string and the outer shell and the drill string and the well bottom. The coupling between torsion, lateral, and axial vibrations and the nonlinear interactions between them need to be investigated to better understand the dynamic behavior of the drill string system. As a preliminary step towards understanding the dynamics of the drill string, four-degree-of-freedom models are developed for the system by using two rotating sections: an inner stator that can undergo radial displacements and an outer rotor. Stickslip interactions between the drill string and the outer shell are also considered in the model development. Two sets of differential equations are obtained for the system by using displacements and momenta as system states in one model and displacements and velocities as system states in another model. For different values of friction coefficients, rotation speeds, and rotation torques, the results obtained by using the developed models are presented., discussed, and compared with experimental results.

KW - Drill string

KW - Reduced-order model

KW - Stick-slip interactions

UR - http://www.scopus.com/inward/record.url?scp=77954259691&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77954259691&partnerID=8YFLogxK

U2 - 10.1115/IMECE2009-10339

DO - 10.1115/IMECE2009-10339

M3 - Conference contribution

AN - SCOPUS:77954259691

SN - 9780791843833

VL - 10

SP - 451

EP - 460

BT - Proceedings of the ASME International Mechanical Engineering Congress and Exposition 2009, IMECE 2009

PB - American Society of Mechanical Engineers (ASME)

ER -