Alternating flow resistance increases and decreases for propagating pressure pulses in a subterranean well
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United States of America Patent
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Jul 19, 2016
Grant Date -
Oct 24, 2013
app pub date -
May 29, 2013
filing date -
Aug 18, 2009
priority date (Note) -
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Abstract
A method of propagating pressure pulses in a well can include flowing a fluid composition through a variable flow resistance system which includes a vortex chamber having at least one inlet and an outlet, a vortex being created when the fluid composition spirals about the outlet, and a resistance to flow of the fluid composition alternately increasing and decreasing. The vortex can be alternately created and dissipated in response to flowing the fluid composition through the system. A well system can include a variable flow resistance system which propagates pressure pulses into a formation in response to flow of a fluid composition from the formation.
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