The influence of geometry on the pressure field within the confined, water-filled annulus between a central, vibrating cylinder and an outer, rigid enclosure is determined. A two-dimensional model is constructed using the finite element (FE) method and parameters are identified to characterize the eccentricity of the nominal cylinder position, the size of the annulus relative to the inner cylinder and the degree to which the annulus is not circular (i.e., it is elliptic). The FE solution is verified using a closed-form solution for the special case of a concentric cylinder and annulus. It is shown that the system acts as a force multiplier. Analyses of the asymmetrical geometries indicate that while the pressure field on the surface of the cylinder and enclosure can be highly asymmetric, the system is relatively insensitive to minor variations in annulus shape except when the vibrating cylinder is not centrally located within the fluid region or the annulus size itself is small.
Skip Nav Destination
Article navigation
June 2002
Technical Papers
Effects of Geometry on the Performance of a Downhole Orbital Vibrator
Robert R. Reynolds, Assistant Professor, Mem. ASME,
Robert R. Reynolds, Assistant Professor, Mem. ASME
Search for other works by this author on:
Jack H. Cole, Professor, Mem. ASME,
Jack H. Cole, Professor, Mem. ASME
Search for other works by this author on:
Zhen Yuan, Formerly, Graduate Research Assistant
Zhen Yuan, Formerly, Graduate Research Assistant
Department of Mechanical Engineering, University of Arkansas, Fayetteville, AR 72701
Search for other works by this author on:
Zhen Yuan, Formerly, Graduate Research Assistant
Department of Mechanical Engineering, University of Arkansas, Fayetteville, AR 72701
Contributed by the Petroleum Division and presented at the International Mechanical Engineering Congress and Exposition, the Winter Annual Meeting of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS, New York, New York, November 11–16, 2001. Manuscript received by the Petroleum Division, June 26, 2001; revised manuscript received January 30, 2002. Editor: A. K. Wojtanowicz.
J. Energy Resour. Technol. Jun 2002, 124(2): 77-82 (6 pages)
Published Online: May 28, 2002
Article history
Received:
June 26, 2001
Revised:
January 30, 2002
Online:
May 28, 2002
Citation
Reynolds, R. R., Cole, J. H., and Yuan, Z. (May 28, 2002). "Effects of Geometry on the Performance of a Downhole Orbital Vibrator ." ASME. J. Energy Resour. Technol. June 2002; 124(2): 77–82. https://doi.org/10.1115/1.1467600
Download citation file:
22
Views
Get Email Alerts
Cited By
Related Articles
A Finite Element Method for Three-Dimensional Analysis of Thermo-acoustic Combustion Instability
J. Eng. Gas Turbines Power (January,2011)
Surface Feature Parametrization Analogous to Conductive Heat Flow
J. Comput. Inf. Sci. Eng (June,2002)
Advanced Geothermal Wellbore Hydraulics Model
J. Energy Resour. Technol (September,2000)
A Generalized Infinite Element for Acoustic Radiation
J. Vib. Acoust (February,2005)
Related Proceedings Papers
Related Chapters
Completing the Picture
Air Engines: The History, Science, and Reality of the Perfect Engine
Boundary Layer Analysis
Centrifugal Compressors: A Strategy for Aerodynamic Design and Analysis
Computer Aided Geometric Modelling
Computer Aided Design and Manufacturing