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Pressure compensator for a subsea device and manufacturing method

  • US 9,752,404 B2
  • Filed: 03/17/2016
  • Issued: 09/05/2017
  • Est. Priority Date: 03/23/2015
  • Status: Active Grant
First Claim
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1. A pressure compensator for a subsea device, the pressure compensator providing pressure balancing between a chamber of the subsea device and the surrounding environment when the subsea device is installed at a subsea location, the pressure compensator comprising:

  • an intermediate compensation chamber, provided by a compensator enclosure sealed against the subsea environment, the compensator enclosure including a bellows portion deformable to change a volume of the intermediate compensation chamber;

    a flexible hose, disposed inside the intermediate compensation chamber, a volume inside the flexible hose between two open ends of the flexible hose providing a main compensation chamber; and

    a flow connection from between the main compensation chamber inside the flexible hose and the chamber of the subsea device, wherein the main compensation chamber inside the flexible hose is sealed from the intermediate compensation chamber in a liquid tight manner, and wherein the flexible hose is deformable to change the volume of the main compensation chamber to accommodate volume changes of a liquid contained in the chamber of the subsea device.

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