Variable-Bore Ram (VBR)

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Closing and sealing component in a ram BOP that is capable of sealing on a range of tubular sizes.

Source: API STANDARD 16AR, Standard for Repair and Remanufacture of Drill-through Equipment, First Edition, April 2017. Global Standards

Closing and sealing component in a ram blowout preventer that is capable of sealing on a range of tubular sizes.

Source: API SPEC 16A, Specification for Drill-through Equipment, Third Edition, June 2004 (Errata/Supplement November 2004). Global Standards

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