Flow restrictor for a mud motor
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United States of America Patent
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Apr 4, 2017
Issued Date -
N/A
app pub date -
Dec 18, 2015
filing date -
Dec 31, 2014
priority date (Note) -
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Abstract
An assembly to restrict fluid flow through the bearing section of a positive displacement or progressive cavity pump or motor. The assembly fits within the bearing chamber and includes an upper ring member, a lower ring member, an outer ring member and a floating member. The floating ring member is axially disposed between the upper and lower ring members. The floating ring member is also disposed at least partially around a drive shaft and is radially movable and constrained inwardly of the outer ring member. The floating ring member has a radial clearance between the drive shaft and a floating ring member inner surface with the radial clearance varying depending on the relative position of the floating ring member to the outer ring member.
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