MANIFOLDS FOR PROVIDING HYDRAULIC FLUID TO A SUBSEA BLOWOUT PREVENTER AND RELATED METHODS

1 . A manifold for providing hydraulic fluid to a hydraulically actuated device of a blowout preventer, the manifold comprising:

at least two inlets, each configured to receive hydraulic fluid from a fluid source;

one or more outlets, the manifold configured to allow each outlet to be in fluid communication with at least two of the inlets; and

one or more subsea valve assemblies, each configured to control hydraulic fluid communication from at least one of the inlets to at least one of the one or more outlets;

where at least one of the one or more outlets is configured to be in fluid communication with an actuation port of the hydraulically actuated device.

2 . The manifold of claim 1 , where at least two of the inlets are each configured to receive hydraulic fluid from a respective fluid source.

3 . The manifold of claim 1 , where at least one of the one or more subsea valve assemblies comprises one or more isolation valves configured to block fluid communication through at least one of the inlets.

4 . The manifold of claim 3 , where at least one of the one or more isolation valves is configured to block fluid communication through at least one of the inlets upon decoupling of the fluid source from the inlet.

5 . The manifold of claim 1 , where at least one of the one or more subsea valve assemblies comprises one or more isolation valves configured to block fluid communication through at least one of the one or more outlets.

6 . The manifold of claim 5 , where at least one of the one or more isolation valves is configured to block fluid communication through at least one of the one or more outlets upon decoupling of the outlet from the actuation port of the hydraulically actuated device.

7 . A manifold for providing hydraulic fluid to a hydraulically actuated device of a blowout preventer, the manifold comprising:

a first subsea valve module comprising:

one or more inlets, each configured to receive hydraulic fluid from a fluid source;

at least two outlets, the subsea valve module configured to allow each outlet to be in fluid communication with a same one of the one or more inlets; and

one or more subsea valve assemblies, each configured to control hydraulic fluid communication from at least one of the one or more inlets to at least one of the outlets;

where a first one of the outlets is configured to be in fluid communication with an actuation port of the hydraulically actuated device, and a second one of the outlets is configured to be in fluid communication with an outlet of a second subsea valve module.

8 . (canceled)

9 . (canceled)

10 . A method for providing hydraulic fluid to a hydraulically actuated device of a blowout preventer, the method comprising:

coupling at least a first fluid source and a second fluid source into fluid communication with an actuation port of the hydraulically actuated device.

11 . The method of claim 10 , comprising:

coupling the first fluid source to a first inlet of a manifold having an outlet in fluid communication with the first inlet and the hydraulically actuated device; and

coupling the second fluid source to a second inlet of the manifold, the second inlet in fluid communication with the outlet.

12 . The method of claim 11 , comprising coupling a third fluid source to a third inlet of the manifold, the third inlet in fluid communication with the outlet.

13 . (canceled)

14 . (canceled)

15 . (canceled)