Single trip cemented expandable enkeltborings liner

An apparatus to protect the mounting area (202) in the casing and a positioning profile (209) and optionally a sliding sleeve valve (200) and a flow path from the outside of the valve to the annulus when subsequent attachment of an expandable liner (218) is intended and the expanded liner will cemented in place. A barrier sleeve (204), nose (207) and the outer sleeve (210) defining a sealed cavity inside having a loose incompressible material (208) which covers the mounting location on the casing. A positioning profile and an optional sliding sleeve valve and a flow path from the outside of the valve to the annulus may be provided. The cementing of the casing takes place through barrierehylsen. After cementing drill sleeve and nose out and the incompressible material is removed to the surface with the drill cuttings.