Method for determining drill string velocity

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 Dec 1989 English Publisher:Acoustical Society of America (ASA)Journal:The Journal of the Acoustical Society of America, volume 86, pages 2,474-2,474 (issn: 0001-4966, eissn: 1520-8524,

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Authors: James W. Rector;

doi: 10.1121/1.398378

Method for determining drill string velocity

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Abstract

The invention is a method of determining the acoustic velocity of a drill string (28) in a borehole (10). An acoustic signal is generated at a first location(34) along the drill string, and detected at a second location (7). The detected signal is autocorrelated and the time of occurrence of multipath reflections on the autocorrelation record is utilized to determine acoustic velocity.

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