CLAMP DEVICE FOR SEALING A PIPE DEFECT

摘要

The present invention regards a clamp device for arrangement in connection with a pipe (1), comprising an outer clamp structure (10) for arrangement around a pipe (1) at least one pressure piston (12) and at least one packer element (13, 17) arranged between the pressure piston (12) and the outer clamp structure (10) or another pressure piston (12), arranged movable relative the outer clamp structure (10). Where the pressure piston (12) comprises a high pressure surface (20) exposed to a fluid at a higher pressure around the clamp device and at least one packer pressure surface (26, 27) in abutments against the packer element (13, 17) where the high pressure surface (20) has a larger area than the packer pressure surfaces (26, 27).