Apparatus and method for downhole lubrication replenishment
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United States of America Patent
Stats
-
May 27, 2003
Grant Date -
N/A
app pub date -
Apr 17, 2001
filing date -
Apr 17, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A lubricant ejector used downhole has a reservoir holding replenishment lubricant, and it includes a driver to eject at least a portion of the lubricant. A flow coupler connected to the ejector channels lubricant to a connected apparatus. One specific ejector includes a hollow rotor of a downhole motor, and a specific flow coupler includes a cross-channel diverter that directs lubricant from the hollow interior of the rotor to a bearing pack and that directs drilling fluid, used to drive the motor and create pressure that moves a piston in the rotor, from outside the rotor to inside a passageway through the bearing pack. A method includes injecting lubricant from a reservoir in the downhole motor into the bearing pack as the downhole motor operates.
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