Acoustic determination of piston position in a modular dynamics tester displacement pump and methods to provide estimates of fluid flow rate
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United States of America Patent
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May 17, 2016
Grant Date -
Jan 8, 2015
app pub date -
Jul 3, 2013
filing date -
Jul 3, 2013
priority date (Note) -
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Abstract
A method for determining a piston position in a downhole tool, having steps of providing a transducer in the downhole tool, wherein the tool has a piston used to create a vacuum for the downhole tool, providing a transducer tone burst to provide acoustic energy toward the piston, reflecting the transducer tone burst by a surface of the piston, receiving the transducer tone burst at a receiver, calculating time of flight for the transducer tone burst and determining the piston position in the downhole tool based upon the calculated time of flight of the transducer tone burst.
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