Cold working definition
Cold working is a steel industry term that means changing the steel shape without applying heat. A plumber may use a simple radius tool to bend conduit tube running along a ceiling, which is cold working it. Cold working does change the steel strength slightly in the area affected. With expandable casing, typically the full length of ‘expandable’ casing string is radially outwardly made bigger, both its inside and outside diameter, arising from the cold working expansion; yet the casing strength reduction may low enough to satisfy the well design and expandable use in that application.