A re-connecting device for connecting and sealing against a damaged existing/remaining tubing in a well bore or a casing string or a pipe, the tubing having smaller diameter than the well bore or casing string or pipe, and for repairing of the tubing, the re-connecting device comprising an outer body and at least one sealing element arranged therein, wherein the outer body is arranged to enable the entrance of an end part of the tubing in the well bore or casing string or pipe, and the outer body thereby surrounding said end part, and a sealing assembly is arranged in the outer body, of the re-connecting device, for sealing it against the tubing, and said sealing assembly comprising the at least one sealing element,wherein an internal and axially movable assembly is arranged inside the outer body and comprising an anchoring assembly, the sealing assembly and a releasable locking assembly, characterised in that - fixing elements (25,28) are arranged to keep the different parts of the movable assembly fixed in relation to each other, in an inactivated position of the re-connecting device, - said fixing elements (25,28) are shearable and adapted to shear when subjected to an axial force that reaches a predetermined level, - the movable assembly and at least one of its anchoring assembly and sealing assembly is/are arranged to be activated by applying an axial mechanical/physical stroke to the top of the moveable assembly, which axial force reaches the predetermined level at which the fixing elements (25,28) shears, - the sealing element is arranged to expand inwards against the tubing when pressed from above by an upper sleeve, upon activation of the sealing assembly, - an end stop in the form of a lower sleeve is arranged on a lower end side of the sealing element, - the anchoring assembly comprises an upper cone and slips, which slips are located between the upper cone and a lower cone arranged below the slips and which slips have matching conically formed surfaces on their backsides and further have gripping elements on an inner side facing the tubing, wherein the upper cone is arranged to have force transferred to it by the lower sleeve upon activation of the sealing assembly, and which slips are configured to be pressed against the lower cone and pushed, against compression springs, inwards against the tubing when the upper cone is moved downwards by means of the lower sleeve and thereby activating the anchoring assembly, and - the locking assembly comprises a split lock ring with an external thread and a corresponding internal thread in the outer body, the split lock ring being collapsible inwardly during activation of the re-connecting device by applying an axial mechanical/physical stroke to the top of the moveable assembly, whereby the split lock ring travels downwardly and its external thread enters into locking engagement with the internal thread provided in the outer body. - fixing elements (25,28) are arranged to keep the different parts of the movable assembly fixed in relation to each other, in an inactivated position of the re-connecting device, - said fixing elements (25,28) are shearable and adapted to shear when subjected to an axial force that reaches a predetermined level, - the movable assembly and at least one of its anchoring assembly and sealing assembly is/are arranged to be activated by applying an axial mechanical/physical stroke to the top of the moveable assembly, which axial force reaches the predetermined level at which the fixing elements (25,28) shears, - the sealing element is arranged to expand inwards against the tubing when pressed from above by an upper sleeve, upon activation of the sealing assembly, - an end stop in the form of a lower sleeve is arranged on a lower end side of the sealing element, - the anchoring assembly comprises an upper cone and slips, which slips are located between the upper cone and a lower cone arranged below the slips and which slips have matching conically formed surfaces on their backsides and further have gripping elements on an inner side facing the tubing, wherein the upper cone is arranged to have force transferred to it by the lower sleeve upon activation of the sealing assembly, and which slips are configured to be pressed against the lower cone and pushed, against compression springs, inwards against the tubing when the upper cone is moved downwards by means of the lower sleeve and thereby activating the anchoring assembly, and - the locking assembly comprises a split lock ring with an external thread and a corresponding internal thread in the outer body, the split lock ring being collapsible inwardly during activation of the re-connecting device by applying an axial mechanical/physical stroke to the top of the moveable assembly, whereby the split lock ring travels downwardly and its external thread enters into locking engagement with the internal thread provided in the outer body.