DOWNHOLE EXPANDABLE TUBING

摘要

A downhole apparatus comprises a plurality of tubing sections. Each tubing section has substantially cylindrical end portions initially of a first diameter for coupling to end portions of adjacent tubing sections. The end portions are expandable to a larger second diameter. Each tubing section als o has an intermediate folded wall portions initially in a folded configuration . The intermediate folded wall portions are unfoldable to define a substantial ly cylindrical form of a third diameter.