Abstract: Blowout preventer (BOP) systems and methods for providing additional redundancy and reliability are provided. A BOP system for providing additional redundancy can include a first set of components including a BOP control pod with a primary regulator and a secondary regulator, where the primary regulator and the secondary regulator are arranged in a parallel configuration; a hydraulic supply line in communication with the BOP control pod; a pod select valve in communication with the primary regulator and the secondary regulator; and a bypassable hydraulic regulator in communication with the pod select valve; and a second set of components, the bypassable hydraulic regulator disposed between the pod select valve and the second set of components, where a hydraulic regulator bypass line bypasses the bypassable hydraulic regulator between the pod select valve and the second set of components.

Abstract: A subsea blowout preventer control system has horizontally oriented solenoid valve housings. Solenoid valves mounted within each of the solenoid valve housings are electrically controlled to selectively provide a hydraulic pilot signal to a hydraulic valve. A vertically extending central chamber contains a dielectric liquid and extends alongside the solenoid valve housings. A communication tube for each solenoid valve housing has an open upper end within the central chamber adjacent an upper end of the central chamber. Each of the communication tubes has an open lower end extending into one of the solenoid valve housings for communicating dielectric liquid in the central chamber with an interior of each of the solenoid valve housings. A separate drain line mounted to each of the solenoid valve housings enables draining of one of the solenoid valve housings for maintenance without requiring draining of other of the solenoid valve housings.

Abstract: Blowout preventer (BOP) systems and methods for providing additional redundancy and reliability are provided. A BOP system for providing additional redundancy can include a first set of components including a BOP control pod with a primary regulator and a secondary regulator, where the primary regulator and the secondary regulator are arranged in a parallel configuration; a hydraulic supply line in communication with the BOP control pod; a pod select valve in communication with the primary regulator and the secondary regulator; and a bypassable hydraulic regulator in communication with the pod select valve; and a second set of components, the bypassable hydraulic regulator disposed between the pod select valve and the second set of components, where a hydraulic regulator bypass line bypasses the bypassable hydraulic regulator between the pod select valve and the second set of components.

Abstract: A blowout preventer control system includes a valve block having a solenoid valve face and a hydraulic valve face. Solenoid valve cavities extend into the valve block front the solenoid valve face, each solenoid valve cavity containing an electrically actuated solenoid valve. Hydraulic valve cavities extend into the valve block from the hydraulic valve face, each containing a hydraulic valve. A solenoid valve supply passage in the valve block joins each of the solenoid valve cavities. A solenoid valve pilot passage in the valve block extends from one of the solenoid valve cavities to tine of the hydraulic valves. A hydraulic valve supply passage in the valve block joins each of the hydraulic valve cavities. A hydraulic valve outlet passage extends from each of the hydraulic valve cavities out of the valve block.

Abstract: A subsea blowout preventer control system has horizontally oriented solenoid valve housings. Solenoid valves mounted within each of the solenoid valve housings are electrically controlled to selectively provide a hydraulic pilot signal to a hydraulic valve. A vertically extending central chamber contains a dielectric liquid and extends alongside the solenoid valve housings. A communication tube for each solenoid valve housing has an open upper end within the central chamber adjacent an upper end of the central chamber. Each of the communication tubes has an open lower end extending into one of the solenoid valve housings for communicating dielectric liquid in the central chamber with an interior of each of the solenoid valve housings. A separate drain line mounted to each of the solenoid valve housings enables draining of one of the solenoid valve housings for maintenance without requiring draining of other of the solenoid valve housings.