New Design of Solid-Expandable Tubular Aids Patching of Hard-To-Reach Casing

摘要

Solid-expandable tubular (SET) is widely used to patch casing and has proved to be cost effective; however, when the damage is directly below an area previously patched, conventional expandable tubular might not be positioned smoothly because of a loss in wellbore size caused by the previously installed tubular. A new design involves putting the expansion tool outside the tubular. As a result, the expansion ratio could be maximized and the tubular without launcher could pass through the smaller wellbore.