Abstract: A decomposable sealing device is described for use in liquid-filled pipes or boreholes, which is characterised in that the sealing device comprises a sleeve-shaped element (19) which envelops a number of strata (5, 7, 9) completely or partly in the pipe's radial and a longitudinal direction, comprising layered division of a number of decomposable strata (5, 7, 9) and a number of closed liquid-filled chambers (16) arranged between the strata (5, 7, 9) and where the sleeve-shaped element (19) comprises a body (2) which can be rearranged to establish connection between the respective chambers (16) and one or more grooves (14) in the inner wall of a pipe. A method for decomposing the sealing device is also described.

Abstract: A decomposable sealing device is described for use in liquid-filled pipes or boreholes, which is characterised in that the sealing device comprises a sleeve-shaped element (19) which envelops a number of strata (5, 7, 9) completely or partly in the pipe's radial and a longitudinal direction, comprising layered division of a number of decomposable strata (5, 7, 9) and a number of closed liquid-filled chambers (16) arranged between the strata (5, 7, 9) and where the sleeve-shaped element (19) comprises a body (2) which can be rearranged to establish connection between the respective chambers (16) and one or more grooves (14) in the inner wall of a pipe. A method for decomposing the sealing device is also described.