(Last Updated On: December 27, 2018)

An accumulator is a device used to create and stores the hydraulic pressure on a drilling rig needed to close a BOP (Blowout Preventer) valve when a blowout occurs. An accumulator is sometimes called a blowout closing unit or BOP control unit because of its function and also due to the shape of the cylinder behind the accumulator, is sometimes called surge bottle. It is rated as one of the most important system in drilling and workover operation.

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