Compression Ring Having Butt Seal, and Method

A compression ring, has a ring running surface (2) on a first butt end region, a ring running surface (2′) on a second butt end region, a ring inner surface (4), a top ring flank surface (6) and a bottom ring flank surface (8), wherein the ring has overlapping first and second butt end regions. The first butt end region has at least one protrusion (10) in the circumferential direction, and the second butt end region has at least one recess (12) in the circumferential direction. The at least one protrusion (10) forms at least one axial and/or radial overlap surface, and the at least one recess (12) forms at least one parallel surface, which lies at least partially opposite to the axial and/or radial overlap surface in order to shift parallel to one another in response to a change of the butt play. At least one of the surfaces, which can be shifted parallel to one another, is provided with an axial wear element (14) and/or with a radial wear element (14′).