Well assembly with a millable member in an opening

摘要

Assemblies that can be disposed in a subterranean bore are described. An assembly can include a body and a member that is made from a different material that the material from which the body is made. The member can be located in an opening in the body and can be coupled to the body. The member coupled to the body can define an inner diameter and form a seal for the inner diameter. The member can be milled to access an environment exterior to the member and the body for example to create a branch wellbore.