Nonlinearity and spectrum analysis of drill strings with component mass unbalance

F. Abdul Majeed; H. Karki; Y. Abdel Magid; M. Karkoub

Nonlinearity and spectrum analysis of drill strings with component mass unbalance

F. Abdul Majeed, H. Karki, Y. Abdel Magid, M. Karkoub

Mechanical & Nuclear Engineering

Texas A and M University at Qatar

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

This paper analyses the non linear properties exhibited by a drill string system under various un balanced mass conditions. The drill string is affected by continuous friction in the form of drill bit and well bore hole interactions. This paper proves the origin of limit cycling and increase of non linearity with increase in speed of the drilling in the presence of friction. The spectrum of the frequency response is also studied to detect the presence of vibration abnormalities arising during the drilling process.

Original language	British English
Pages (from-to)	459-462
Number of pages	4
Journal	World Academy of Science, Engineering and Technology
Volume	73
State	Published - Jan 2011

Keywords

Drill strings
Nonlinear
Spectrum analysis
Unbalanced mass

Cite this

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abstract = "This paper analyses the non linear properties exhibited by a drill string system under various un balanced mass conditions. The drill string is affected by continuous friction in the form of drill bit and well bore hole interactions. This paper proves the origin of limit cycling and increase of non linearity with increase in speed of the drilling in the presence of friction. The spectrum of the frequency response is also studied to detect the presence of vibration abnormalities arising during the drilling process.",

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AB - This paper analyses the non linear properties exhibited by a drill string system under various un balanced mass conditions. The drill string is affected by continuous friction in the form of drill bit and well bore hole interactions. This paper proves the origin of limit cycling and increase of non linearity with increase in speed of the drilling in the presence of friction. The spectrum of the frequency response is also studied to detect the presence of vibration abnormalities arising during the drilling process.

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KW - Spectrum analysis

KW - Unbalanced mass

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Nonlinearity and spectrum analysis of drill strings with component mass unbalance

Abstract

Keywords

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