Abstract: A housing system includes a housing body having an internal cavity and an opening. A cap is removably fitted to the opening using a set of sliders. Each slider in the set of sliders has a fixed rail secured to an internal surface of the housing body and a dynamic rail connected to an inner surface of the cap. The cap slides between open and closed configurations on the dynamic rail. One or more components are also connected to the inner surface of the cap, such that when the cap is opened, the one or more components are accessible.

Abstract: A riser sensor unit is used to sense engagement of a subsea riser tool with a riser coupling. The riser sensor unit includes a power supply configured to convert alternating current to direct current, an intrinsic safety barrier connected to the power supply, and a first sensor powered by the intrinsic safety barrier. The first sensor is attached to a sub of the subsea riser tool and is configured to generate a first signal upon detecting contact of a bottom surface of the sub with the riser coupling. The intrinsic safety barrier is configured to receive the first signal from the first sensor and transmit the first signal to a control system located remotely from the intrinsic safety barrier.

Abstract: A safety integrity level rated control system includes a surface control system and a subsea control system. The surface control system includes one or more remote display panels, one or more buttons operatively connected to each of the remote display panels, two main controllers connected to the remote display panels, two junction boxes, each junction box connected to one of the two main controllers, and a surface intervention system controller connected to the one or more buttons via a wiring bus. The subsea control system is connected to the surface control system by one or more umbilicals extending from the two junction boxes.

Abstract: A subsea wiring apparatus includes a housing having a cavity extending from a first end to a second end. The apparatus also includes an electrical connector arranged within the cavity, the electrical connector receiving at least one conductor. The apparatus further includes a separator extending at least partially into the cavity, wherein the separator receives the at least one conductor and directs the at least one conductor into a passage. The apparatus also includes an isolating material within the cavity, the isolating material extending from the first end to the second end, wherein the isolating material surrounds at least a portion of the conductor to block fluid communication with the conductor.

Abstract: Systems and methods for a riser coupling are disclosed. A riser sensor unit for sensing engagement of a riser tool with a riser coupling includes a first sensor attached to a sub of the riser tool. The first sensor is configured to generate a first signal upon detecting contact with the riser coupling, and an intrinsic safety barrier is configured to transmit the first signal to a control system.

Abstract: A subsea wiring apparatus includes a housing having a cavity extending from a first end to a second end. The apparatus also includes an electrical connector arranged within the cavity, the electrical connector receiving at least one conductor. The apparatus further includes a separator extending at least partially into the cavity, wherein the separator receives the at least one conductor and directs the at least one conductor into a passage. The apparatus also includes an isolating material within the cavity, the isolating material extending from the first end to the second end, wherein the isolating material surrounds at least a portion of the conductor to block fluid communication with the conductor.

Abstract: A plurality of PODs for a lower marine riser package (LMRP) is disclosed. At least a first subsea electronics module (SEM) and a second SEM are provided in a first POD of the plurality of PODs. At least a third SEM and a fourth SEM are provided in a second pod. The third SEM is redundant with the first SEM and the fourth SEM is redundant with the second SEM. At least one selector circuit is provided to transmit an SEM select signal that electrically activates or electrically deactivates the first SEM separately from the third SEM. As a result, each of the SEMs in the plurality of PODs may be separately activated or deactivated without a need to turn off fluid provided to hydraulic valves in the first and the second PODs that are controlled by corresponding SEMs.

Abstract: A control system for a subsea blowout preventer (BOP) positioned in a lower stack, the lower stack releasably engaged with a lower marine riser package (LMRP). The control system includes a surface logic solver positioned at or adjacent the surface of the sea that generates commands for operating the subsea BOP, a first subsea logic solver attached to the LMRP and in communication with the surface logic solver so that the first subsea logic solver receives the commands from the surface logic solver, and a second subsea logic solver attached to a hydraulic control unit in the lower stack. The second subsea logic solver is in hydraulic communication with the subsea BOP, and the first subsea logic solver so that the second subsea logic solver receives the commands from the first subsea logic solver and implements the commands by activating the hydraulic control unit to operate the BOP.

Abstract: A control system for a subsea blowout preventer (BOP) positioned in a lower stack, the lower stack releasably engaged with a lower marine riser package (LMRP). The control system includes a surface logic solver positioned at or adjacent the surface of the sea that generates commands for operating the subsea BOP, a first subsea logic solver attached to the LMRP and in communication with the surface logic solver so that the first subsea logic solver receives the commands from the surface logic solver, and a second subsea logic solver attached to a hydraulic control unit in the lower stack. The second subsea logic solver is in hydraulic communication with the subsea BOP, and the first subsea logic solver so that the second subsea logic solver receives the commands from the first subsea logic solver and implements the commands by activating the hydraulic control unit to operate the BOP.

Abstract: Systems and methods for a riser coupling are disclosed. A riser sensor unit for sensing engagement of a riser tool with a riser coupling includes a first sensor attached to a sub of the riser tool. The first sensor is configured to generate a first signal upon detecting contact with the riser coupling, and an intrinsic safety barrier is configured to transmit the first signal to a control system.