Filter assembly having a bypass passageway and method
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United States of America Patent
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Jul 17, 2007
Grant Date -
Jun 9, 2005
app pub date -
Nov 9, 2004
filing date -
Dec 5, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A filter assembly including a primary flow passageway having at least one filter deployed therein and a secondary flow passageway having a bypass filter deployed therein is provided. The filter assembly further includes a bypass valve assembly configured to selectively open and close the secondary flow passageway when a fluid pressure is respectively above and below an adjustable, predetermined threshold value. Exemplary embodiments of this invention may be coupled to a drill string and advantageously utilized to filter drilling fluid downhole. Such embodiments tend to advantageously improve the filtering efficiency and safety of drilling operations.
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