Subsea Pressure Delivery System

Abstract

A subsea system including a frame including an intensifier, the intensifier providing structural support to the frame and capable of providing pressurized delivery fluid. The intensifier includes an intensifier chamber and a delivery fluid chamber separated by a piston, the intensifier chamber capable of receiving ambient pressure to provide a pressure on the delivery fluid through the piston. Also, a regulation system regulates the amount of ambient pressure communicated to the intensifier chamber to maintain the delivery fluid pressure substantially constant as the delivery fluid is depleted.

What is claimed is: 
     
         1 . A subsea system comprising:
 a frame of a subsea assembly;   a pressure delivery component included with the frame and configured to provide additional structural support to the frame;   the pressure delivery component configured to provide hydraulic fluid to a subsea device.   
     
     
         2 . The system of  claim 1 , wherein the subsea device comprises at least one of a blowout preventer, a subsea production tree, a subsea distribution unit, and a subsea production manifold. 
     
     
         3 . The system of  claim 2 , wherein the frame comprises a mudmat and the subsea device is operable using the hydraulic fluid from the pressure delivery component. 
     
     
         4 . The system of  claim 1 , wherein:
 the subsea device comprises a blowout preventer;   the frame is configured to support the blowout preventer; and   the blowout preventer is operable using the hydraulic fluid from the pressure delivery component.   
     
     
         5 . The system of  claim 1 , the system configured to be remotely controllable from a sea surface. 
     
     
         6 . The system of  claim 1 , wherein the pressure delivery component comprises at least one of an intensifier, an accumulator, and a conduit line. 
     
     
         7 . The system of  claim 1 , wherein the pressure delivery component comprises an intensifier comprising an intensifier chamber and a delivery fluid chamber separated by a piston, the intensifier chamber configured to receive ambient pressure to provide a pressure on the hydraulic fluid through the piston. 
     
     
         8 . The system of  claim 7 , further comprising a regulation system configured to regulate the amount of ambient pressure communicated to the intensifier chamber to maintain the hydraulic fluid pressure substantially constant as the hydraulic fluid is depleted. 
     
     
         9 . The system of  claim 8 , wherein the regulation system comprises a regulator, a reference pilot accumulator, and a reference reservoir, the regulation system being controllable using a closed-loop control system based in part on the hydraulic fluid pressure of the intensifier. 
     
     
         10 . The system of  claim 7 , wherein:
 the intensifier is rechargeable by resetting the piston using at least one of hydrostatic pressure, a recharge pump powered by a power pack, and an external fluid recovery tank; and   the power pack is configured to store power from a regenerator powered using fluid discharged from the intensifier.   
     
     
         11 . The system of  claim 7 , wherein the piston is operable as a pressure intensifying pump, wherein seawater pressure regulated by the regulation system is increased to the delivery fluid pressure by an intensification factor. 
     
     
         12 . A subsea well system comprising:
 a subsea high pressure wellhead housing;   a subsea device operable with the subsea high pressure wellhead housing;   a subsea assembly comprising a frame;   a pressure delivery component included with the frame and configured to provide additional structural support to the frame; and   wherein the pressure delivery component is configured to provide hydraulic fluid to the subsea device.   
     
     
         13 . The system of  claim 12 , wherein:
 the subsea device comprises a blowout preventer;   the frame is configured to connect to the wellhead and support the blowout preventer; and   the blowout preventer is operable using the hydraulic fluid from the pressure delivery component.   
     
     
         14 . The system of  claim 12 , the system configured to be remotely controllable from a sea surface. 
     
     
         15 . The system of  claim 12 , wherein the pressure delivery component comprises at least one of an intensifier, an accumulator, and a conduit line. 
     
     
         16 . The system of  claim 12 , wherein the pressure delivery component comprises an intensifier comprising an intensifier chamber and a delivery fluid chamber separated by a piston, the intensifier chamber configured to receive ambient pressure to provide a pressure on the hydraulic fluid through the piston. 
     
     
         17 . The system of  claim 16 , further comprising a regulation system configured to regulate the amount of ambient pressure communicated to the intensifier chamber to maintain the hydraulic fluid pressure substantially constant as the hydraulic fluid is depleted. 
     
     
         18 . The system of  claim 17 , wherein the regulation system comprises a regulator, a reference pilot accumulator, and a reference reservoir, the regulation system being controllable using a closed-loop control system based in part on the hydraulic fluid pressure of the intensifier. 
     
     
         19 . The system of  claim 16 , wherein:
 the intensifier is rechargeable by resetting the piston using at least one of hydrostatic pressure, a recharge pump powered by a power pack, and an external fluid recovery tank; and   the power pack is configured to store power from a regenerator powered using fluid discharged from the intensifier.   
     
     
         20 . The system of  claim 16 , wherein the piston is operable as a pressure intensifying pump, wherein seawater pressure regulated by the regulation system is increased to the delivery fluid pressure by an intensification factor.