Flow switchable check valve and method

Details Flow switchable check valve and method Flow switchable check valve and method

2007-06-26

2007-06-26

Mai, Lanna (Department: 3637)

Wells

Processes

Operating valve, closure, or changeable restrictor in a well

C166S323000, C166S325000

Reexamination Certificate

active

10819593

ABSTRACT:
According to one embodiment of the invention, a flow switchable check valve includes a housing, a guide member having a bore extending therethrough disposed within the housing, and a poppet having a head and a stem. The head has an upstream surface engaged with a seating surface on the housing when the poppet is in a first position. A pin extends into a groove such that the pin follows a pattern of the groove when the poppet is translated within the housing. The pattern is configured to direct the poppet from the first position to a second position when a force is applied to the head, and further configured to direct the poppet from the second position to a third position when the force is removed from the head, in which the third position is downstream from the first position.

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