EXPANDABLE LINER HANGER

摘要

A downhole expandable liner hanger apparatus (10) for extending the length of an existing tubular such as a casing (40) or liner string is described. The apparatus (10) comprises a tubular portion and a securing and/or sealing means for securing the tubular portion to the existing tubular such as a casing string (40) to thereby extend the length of the existing tubular (40) and preferably simultaneously provide a sealed coupling between the tubular portion and the existing tubular (40). A first part or a length (30) of the tubular portion (10) preferably comprises a first sidewall thickness and a second part or length (38, 39) of the tubular portion is located adjacent the first part, where the second part (38, 39) comprises a second sidewall thickness, said first sidewall thickness being less than the second sidewall thickness.