FINITE ELEMENT DYNAMICS emulation OF BHA

doi:10.3863/j.issn.1000-2634.2008.06.020

西南石油大学学报(自然科学版) ›› 2008, Vol. 30 ›› Issue (6): 85-88.DOI: 10.3863/j.issn.1000-2634.2008.06.020

• 石油与天然气工程 • Previous Articles Next Articles

FINITE ELEMENT DYNAMICS emulation OF BHA

LIN Yuan-hua¹ FU Jian-hong¹ LU Ya-feng¹ DAI Rong-dong² YAN Zhen-lai²

1.Key Laboratory for Mechanical and Environmental Behavior of Tubular Goods，Southwest Petroleum University，Chengdu Sichuan 610500，China；2.Drilling Technology Research Institute，Shengli Petroleum Bureau，Dongying Shandong 257017，China

Received:1900-01-01 Revised:1900-01-01 Online:2008-12-20 Published:2008-12-20

Abstract

Abstract:

The mechanism of BHA vibration in the process of drilling is analyzed，then a threedimensional finite element mechanical model of BHA is established，by using

Forced Frequency Theory and Gauss algorithm for solution of dynamics equations，maximum radial deformation and bending stress at different rotation speed are obtained，and

the corresponding frequency response curves drawn to determine the critical speed.Research showed that drillstring rotational speed greatly impact drilling string

virbration，Drillstring usually working rotational speed should avoid the BHA speed resonant frequency that can slow down the drillstring vibration for protect drillsting.

Key words: BHA, finite element, dynamics, emulation

CLC Number:

TE921.2

LIN Yuan-hua FU Jian-hong LU Ya-feng DAI Rong-dong YAN Zhen-lai . FINITE ELEMENT DYNAMICS emulation OF BHA[J]. 西南石油大学学报(自然科学版), 2008, 30(6): 85-88.

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http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2008/V30/I6/85

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FINITE ELEMENT DYNAMICS emulation OF BHA

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