| 主权项 |
1. A latch for separating a workover riser from a sub sea isolation system in the event of over-tensioning of the workover riser the latch including:
a first latch portion adapted to be connected to a sub sea isolation system; a second latch portion adapted to be connected to a workover riser, the second latch portion being moveable relative to the first portion from an operating configuration to a released configuration; latching means releasably connecting the first portion to the sub sea isolation system, the latching means being movable between an engaged position in which the latching means are engaged with the sub sea isolation system and a disengaged position in which the latching means are disengaged from the subsea isolation system; wherein, in use, when the tension in the workover riser exceeds a pre-determined value, relative movement of the second latch portion with respect to the first latch portion from the operating configuration to the displaced configuration permits the latching means to move from the engaged position to the disengaged position, releasing the latch from the sub sea isolation system such that the workover riser is separated from the sub sea isolation system. |
