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RESEARCH PAPERS

Effect of Drillstring Vibrations on MWD Pressure Pulse Signals

[+] Author and Article Information
W. E. Lear, D. W. Dareing

Mechanical Engineering Department, University of Florida, Gainesville, FL 32611

J. Energy Resour. Technol 112(2), 84-89 (Jun 01, 1990) (6 pages) doi:10.1115/1.2905727 History: Received September 01, 1989; Revised March 13, 1990; Online April 16, 2008

Abstract

Axial vibrations of drillstrings produce pressure variations within the drilling fluid column. These pressure variations are imposed on controlled pressure pulse signals from Measurement-While-Drilling (MWD) tools producing background noise in pressure pulse data measured at the rig. The paper shows the effect on signal-to-noise ratio for various operating conditions, such as vibration frequency, valve opening/closing time, pulsing interval, and flow rate.

Copyright © 1990 by The American Society of Mechanical Engineers
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