Patent ID: 9359832
Filing Date: 2016-06-07
CPC Classification: E21B

Claim Text:
1. A safety device for protection of well barrier(s) against excessive bending moments from a riser, wherein the safety device is arranged to detect critical bending loads in or in between the well barrier(s) and/or riser, the safety device comprising: a curvature detection arrangement configured to detect changes in a curvature between a load carrying riser pipe and an unloaded stiff body attached to or in the vicinity of the riser pipe, said curvature detection arrangement being arranged to monitor a relative distance between the load carrying riser pipe and the unloaded stiff body, a trigger mechanism configured to trigger disconnection of a releasable riser connector when the distance between the load carrying riser pipe and the unloaded stiff body reaches a predefined critical distance, wherein said trigger mechanism is a mechanical trigger comprising an over center mechanism which is arranged to flip over by the touch of the riser pipe.