| 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) in order to lock the movement of the first valve body (11) relative to the second valve body (20) in one direction and in such a manner that when the first locking device (A) is activated, the first valve body (11) is held in an open position as long as the second valve body (20) is in an open position, thereby providing through-flow through the valve device, and a third locking device (C) configured between the second valve body (20) and the housing (1), with the result that release of the third locking device (C) will permit movement of the second valve body (20) relative to the housing (1) and thereby to a closed position of the valve device, thereby also permitting the first valve body (11) to go to a closed position. The invention also relates to a method. |
