Rotary drivehead for downhole apparatus
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United States of America Patent
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-
May 12, 2009
Grant Date -
Jul 28, 2005
app pub date -
Jan 10, 2005
filing date -
Jan 23, 2004
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A drivehead for driving a drive string of a rotary pump or motor includes a bearing housing including lubricating fluid therein, a driveshaft extending through the bearing housing and connectable into drive communication with the drive string, and a concentric pump disposed in the bearing housing about the driveshaft, the concentric pump selected to pump the lubricating fluid through the bearing housing as driven by the driveshaft.
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Cited Art Landscape
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