Bearing system for a downhole motor
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United States of America Patent
Stats
-
Nov 30, 1982
Grant Date -
N/A
app pub date -
Sep 30, 1980
filing date -
Sep 30, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved bearing system for the driven shaft of a downhole motor is shown that provides a main thrust and radial bearing system having means for sealing the bearings in oil at equal or slight pressure above that of the drilling mud inside the drill pipe and insulating the fluid seals and bearings from all possibility of contact with cuttings and debris from the drilling operation. A durable seal having a restricted flow path permitting slow leakage is positioned below the main bearing system in such a relationship to the drilling fluid distribution path that the seals for the oil bath for the bearings are subjected to essentially the same pressure on all sides.
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