HIGH PRESSURE CASING PATCH

摘要

A method of preparing a downhole casing tubular and a casing patch apparatus for connecting onto a stub casing in a wellbore are provided. The casing patch apparatus includes a tubular body having an opening large enough to pass over the stub. The casing patch also includes a seal assembly having at least one cantilevered fin mounted within the body. The fin has an initial inner diameter smaller than the outer diameter of the stub such that it is deflected as the body is advanced over the stub. The fin provides a metal-to-metal seal between the body and the stub. A gripping assembly holds the body to the stub.