Two stage downhole drilling fluid filter
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United States of America Patent
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Apr 6, 2004
Grant Date -
Mar 18, 2004
app pub date -
Sep 17, 2002
filing date -
Sep 17, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A two stage filter for drilling fluid using downhole tools filters solid materials from the drilling fluid and has a first, outer filter section and a second, inner filter section. A portion of the drilling fluid flowing through the first section is received by the second section, and passed on to the fluid using device of the tool. A flow area of the first filter section is greater than a flow area of the second filter section.
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