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Unformatted text preview: (3) the subsea engineer control room. The BOP had two emergency disconnect systems sequencing options, referred to as “EDS 1” and “EDS 2.” Both emergency disconnect system options were designed to close the BSRs, close the choke and kill valves, and unlatch the LMRP Connector, along with choke and kill connectors. EDS 2, however, would also activate the casing shear ram. 331 The step‐by‐step sequences for the Deepwater Horizon’s emergency disconnect system are in Appendix H. The hydraulic power to perform the emergency disconnect system sequence came primarily from the conduit. 332 Upon activation, however, two functions – the high pressure closing of the BSR and of the casing shear ram – would receive their hydraulic power from the BOP stack mounted accumulators. Id. BP‐HZN‐MBI00010443. 332 Id. The conduit in turn received its supply from the hydraulic power unit from the surface. This unit had at least two triplex pumps to supply the pressure to the accumulator bank through the conduit. 330 331 133 The multiplex...
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