Filter assembly having a bypass passageway and method

Details Filter assembly having a bypass passageway and method Filter assembly having a bypass passageway and method

E - Fixed Constructions

21

B

E21B 21/00 (2006.01) B01D 35/02 (2006.01) B01D 35/147 (2006.01) B01D 35/30 (2006.01) E21B 37/06 (2006.01)

Patent

CA 2489051

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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