Influence of friction on buckling of a drill string in the circular channel of a bore hole

Abstract Enhancement of technology and techniques for drilling deep directed oil and gas bore hole is one of the most important problems of the current petroleum industry. Not infrequently, the drilling of these bore holes is attended by occurrence of extraordinary situations associated with technic...

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Autores principales:	Valery Gulyayev, Natalya Shlyun
Formato:	article
Lenguaje:	EN
Publicado:	KeAi Communications Co., Ltd. 2016
Materias:	Directed bore hole Drill string Critical states Singular perturbation Friction forces Harmonic wavelet Science Q Petrology QE420-499
Acceso en línea:	https://doaj.org/article/1c86a6daa4f34beb9e6bde08627c8ec7
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spelling	oai:doaj.org-article:1c86a6daa4f34beb9e6bde08627c8ec72021-12-02T04:52:14ZInfluence of friction on buckling of a drill string in the circular channel of a bore hole10.1007/s12182-016-0122-51672-51071995-8226https://doaj.org/article/1c86a6daa4f34beb9e6bde08627c8ec72016-10-01T00:00:00Zhttp://link.springer.com/article/10.1007/s12182-016-0122-5https://doaj.org/toc/1672-5107https://doaj.org/toc/1995-8226Abstract Enhancement of technology and techniques for drilling deep directed oil and gas bore hole is one of the most important problems of the current petroleum industry. Not infrequently, the drilling of these bore holes is attended by occurrence of extraordinary situations associated with technical accidents. Among these is the Eulerian loss of stability of a drill string in the channel of a curvilinear bore hole. Methods of computer simulation should play a dominant role in prediction of these states. In this paper, a new statement of the problem of critical buckling of the drill strings in 3D curvilinear bore holes is proposed. It is based on combined use of the theory of curvilinear elastic rods, Eulerian theory of stability, theory of channel surfaces, and methods of classical mechanics of systems with nonlinear constraints. It is noted that the stated problem is singularly perturbed and its solutions have the shapes of localized harmonic wavelets. The calculation results showed that the friction effects lead to essential redistribution of internal axial forces, as well as changing the eigenmode shapes and sites of their localization. These features make the buckling phenomena less predictable and raise the role of computer simulation of these effects.Valery GulyayevNatalya ShlyunKeAi Communications Co., Ltd.articleDirected bore holeDrill stringCritical statesSingular perturbationFriction forcesHarmonic waveletScienceQPetrologyQE420-499ENPetroleum Science, Vol 13, Iss 4, Pp 698-711 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	Directed bore hole Drill string Critical states Singular perturbation Friction forces Harmonic wavelet Science Q Petrology QE420-499
spellingShingle	Directed bore hole Drill string Critical states Singular perturbation Friction forces Harmonic wavelet Science Q Petrology QE420-499 Valery Gulyayev Natalya Shlyun Influence of friction on buckling of a drill string in the circular channel of a bore hole
description	Abstract Enhancement of technology and techniques for drilling deep directed oil and gas bore hole is one of the most important problems of the current petroleum industry. Not infrequently, the drilling of these bore holes is attended by occurrence of extraordinary situations associated with technical accidents. Among these is the Eulerian loss of stability of a drill string in the channel of a curvilinear bore hole. Methods of computer simulation should play a dominant role in prediction of these states. In this paper, a new statement of the problem of critical buckling of the drill strings in 3D curvilinear bore holes is proposed. It is based on combined use of the theory of curvilinear elastic rods, Eulerian theory of stability, theory of channel surfaces, and methods of classical mechanics of systems with nonlinear constraints. It is noted that the stated problem is singularly perturbed and its solutions have the shapes of localized harmonic wavelets. The calculation results showed that the friction effects lead to essential redistribution of internal axial forces, as well as changing the eigenmode shapes and sites of their localization. These features make the buckling phenomena less predictable and raise the role of computer simulation of these effects.
format	article
author	Valery Gulyayev Natalya Shlyun
author_facet	Valery Gulyayev Natalya Shlyun
author_sort	Valery Gulyayev
title	Influence of friction on buckling of a drill string in the circular channel of a bore hole
title_short	Influence of friction on buckling of a drill string in the circular channel of a bore hole
title_full	Influence of friction on buckling of a drill string in the circular channel of a bore hole
title_fullStr	Influence of friction on buckling of a drill string in the circular channel of a bore hole
title_full_unstemmed	Influence of friction on buckling of a drill string in the circular channel of a bore hole
title_sort	influence of friction on buckling of a drill string in the circular channel of a bore hole
publisher	KeAi Communications Co., Ltd.
publishDate	2016
url	https://doaj.org/article/1c86a6daa4f34beb9e6bde08627c8ec7
work_keys_str_mv	AT valerygulyayev influenceoffrictiononbucklingofadrillstringinthecircularchannelofaborehole AT natalyashlyun influenceoffrictiononbucklingofadrillstringinthecircularchannelofaborehole
_version_	1718400994596880384

Influence of friction on buckling of a drill string in the circular channel of a bore hole

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