DYNAMIC ANALYSIS OF NON-LINEAR FE MODEL OF DRILLSTRING

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MOHAMMADZADEH MAZIAR; GHAZAVI MOHAMMAD REZA; ALIBEIGLOO AKBAR

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Journal: Modares Mechanical Engineering Year:2015 | Volume:14 | Issue:13 Page(s): 119-130

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Title

DYNAMIC ANALYSIS OF NON-LINEAR FE MODEL OF DRILLSTRING

Author(s)

MOHAMMADZADEH MAZIAR | GHAZAVI MOHAMMAD REZA | ALIBEIGLOO AKBAR | Issue Writer Certificate

Keywords

DRILLSTRINGQ2

DYNAMIC ANALYSISQ2

NON-LINEAR FE MODELQ2

Abstract

In this research, dynamic behavior of non-linear finite element model of a DRILLSTRING is investigated. By considering total length of DRILLSTRING, a three-dimensional timoshenko beam element is employed. In addition the geometric stiffening effect, the added fluid mass and the contact between different parts of the DRILLSTRING and the borehole wall has been considered, with a more complete model than previous studies, the effects of these factors have been analyzed separately. The equations of motion are obtained and full order equations are used to drive the results. For the first time, a domain of DRILLSTRING points that the possibility of contact occurrence in them is more than other points, have been identified. The natural frequencies of the DRILLSTRING are evaluated and compared with the available commercial software results and recorded results for the actual DRILLSTRING. Coupling of vibrations of model is tested and the effect of linear and nonlinear model in analysis of dynamic behavior and vibration of DRILLSTRING, especially in contact with the borehole wall and the effect of weight on bit change on the contact at stabilizers are analyzed and for the first time, the contact time in each of stabilizers have been evaluated.

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APA: Copy

MOHAMMADZADEH, MAZIAR, GHAZAVI, MOHAMMAD REZA, & ALIBEIGLOO, AKBAR. (2015). DYNAMIC ANALYSIS OF NON-LINEAR FE MODEL OF DRILLSTRING. MODARES MECHANICAL ENGINEERING, 14(13), 119-130. SID. https://sid.ir/paper/179702/en

Vancouver: Copy

MOHAMMADZADEH MAZIAR, GHAZAVI MOHAMMAD REZA, ALIBEIGLOO AKBAR. DYNAMIC ANALYSIS OF NON-LINEAR FE MODEL OF DRILLSTRING. MODARES MECHANICAL ENGINEERING[Internet]. 2015;14(13):119-130. Available from: https://sid.ir/paper/179702/en

IEEE: Copy

MAZIAR MOHAMMADZADEH, MOHAMMAD REZA GHAZAVI, and AKBAR ALIBEIGLOO, “DYNAMIC ANALYSIS OF NON-LINEAR FE MODEL OF DRILLSTRING,” MODARES MECHANICAL ENGINEERING, vol. 14, no. 13, pp. 119–130, 2015, [Online]. Available: https://sid.ir/paper/179702/en

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