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нефтегазовая промышленность
падение бурильной колонны (в скважину)
общая лексика
символьная строка
строка символов
нефтегазовая промышленность
прихваченная колонна бурильных труб
A drill string on a drilling rig is a column, or string, of drill pipe that transmits drilling fluid (via the mud pumps) and torque (via the kelly drive or top drive) to the drill bit. The term is loosely applied to the assembled collection of the smuggler pool, drill collars, tools and drill bit. The drill string is hollow so that drilling fluid can be pumped down through it and circulated back up the annulus (the void between the drill string and the casing/open hole).