Patent ID: 8955595
Filing Date: 2015-02-17
Classification: E21B

Abstract:
1. An apparatus for providing a controllable supply of fluid to a subsea well equipment, the apparatus comprising: a reservoir disposed on a seabed for storing a supply of fluid for delivery to the subsea well equipment; a hydraulic power unit disposed on the seabed and fluidly connected to the reservoir, the hydraulic power unit including at least one fluid accumulator; and a subsea pumping device fluidly connected to the hydraulic power unit and configured to receive the fluid from the reservoir via the hydraulic power unit, pressurize the fluid, and deliver the pressurized fluid to the accumulator of the hydraulic power unit, wherein the hydraulic power unit is configured to receive the fluid from the reservoir, direct the fluid to the subsea pumping device, receive the pressurized fluid from the subsea pumping device, store the pressurized fluid in the accumulator, and control an output of the pressurized fluid via a control valve from the accumulator to the subsea well equipment, wherein the subsea pumping device comprises a high pressure pump and a low pressure pump disposed on a skid, the skid being configured to be carried by an ROV to a position proximate the hydraulic power unit on the seabed such that the subsea pumping device can be repeatedly fluidly connected to the hydraulic power unit subsea to refill the accumulator with the pressurized fluid.