A VALVE DEVICE FOR A SIDE POCKET OR A SUB IN A WELL

摘要

The present invention relates to a valve device for use in a side pocket and/or sub in a well, comprising a housing (1) with a first port (2) and a second port (3), a first valve body (11) movably mounted internally in the housing (1), a second valve body (20) mounted internally in the housing (1) and movable relative to both the housing (1) and the first valve body (11), where a first locking device (A) is configured between the first valve body (11) and the second valve body (20) and a third locking device (C) configured between the second valve body (20) and the housing (1). The invention also relates to a method.