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Glossary:Window
-In the context of casing, a window is an exit point of a lateral from a mother bore, generally a hole cut in the side of the casing to allow sidetracking the well. Can also be where the entire section of the casing is removed.
-In the context of hydralics, a window is the allowable effective fluid density difference between the fracturing pressure and the pressures exerted by a fluid that are needed to control formation flow and the wellbore.