Downhole apparatus and method

摘要

A downhole apparatus is described comprising a body (12) and a sealing arrangement (15) located on the body (12). The body (12) has a longitudinal axis (L) and the sealing arrangement (15) comprises at least one elongated sealing member (30) with an axis of elongation extending around the longitudinal axis (L). The sealing member comprises a material selected to expand on exposure to at least one predetermined fluid, such as a hydrocarbon or aqueous fluid encountered in a wellbore. A method of forming the apparatus and methods of use are described. Embodiments of the invention relate to wellbore packers.