Bearing assembly for downhole motor
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United States of America Patent
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-
Apr 22, 2014
Grant Date -
Aug 11, 2011
app pub date -
Feb 9, 2011
filing date -
Feb 11, 2010
priority date (Note) -
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Abstract
A downhole motor for drilling and servicing of wells has an elongated outer housing and an elongated mandrel rotatably disposed within the housing. A primary thrust bearing is disposed between the lower end of the housing and the mandrel, and transfers axial loads downward from the housing to the mandrel, and then to the drill bit or other tool mounted on the lowermost end of the mandrel. The placement of the primary thrust bearing permits it to extend radially to the outer diameter of the housing. One preferred embodiment of the primary thrust bearing comprises bearing surfaces of polycrystalline diamond compact (“PDC”) material.
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