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The full name for this most common type of downhole safety valve is a Tubing Retrievable Surface Controlled Sub-Surface Valve, shortened in completion diagrams to TRSCSSV. If a tubing retrievable valve fails, rather than go to the expense of a workover, a "wireline retrievable" valve may be used instead.
Place {{Thor and Delta rockets}} at the end of an article, but above any categories.. This template's initial visibility currently defaults to autocollapse, meaning that if there is another collapsible item on the page (a navbox, sidebar, or table with the collapsible attribute), it is hidden apart from its title bar; if not, it is fully visible.
Delta (also called "Delta" in the original language) is a 2008 Hungarian drama film directed by Kornél Mundruczó and starring violinist Félix Lajkó in a non-musical acting role and actress Orsi Tóth.