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Drilling Industry Glossary

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Expandable Casing

With the expandable casing, an operator runs a section of pipe into the well and then drops the expansion cone, which is moved by hydraulic fluid run through a smaller line that is connected to the cone. As the cone is pulled back through the pipe with hydraulic and mechanical pressure, the pipe is cold-formed and expanded to its new diameter. Normally, expandable casing only refers to liner.

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