This standard was last reviewed and confirmed in 2017. Therefore this version remains current.
Specifies the basic dimensions for equipment. Gives a list of components; tabulates together with figures: size of drill-steel in bar form; lengths of extension rods; coupling sleeves; bit diameters (four-wing bits); reverse-buttress threads; hollow hexagonal bars for extension rods.
Status : PublishedPublication date : 1974-09
Edition : 1Number of pages : 6
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