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The low-frequency acoustics of drilling a borehole

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Industrial Seminar

A borehole, and the drillstring used to drill it, are long and thin, and so at low frequencies their acoustic behaviour is well described by one-dimensional equations. Despite the apparent simplicity of the equations, they exhibit a range of interesting behaviour, such as acoustic localization, radiation tunnelling and resonances with strong mean flow-rate dependence – all of which have practical implications.

In this talk I shall describe some of the practicalities of deep drilling, before showing how these acoustic phenomena arise.

This talk is part of the Cambridge Centre for Analysis talks series.

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