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Device in a subsea system for controlling a hydraulic actuator and a subsea system with a hydraulic actuator

  • US 6,729,130 B1
  • Filed: 03/20/2002
  • Issued: 05/04/2004
  • Est. Priority Date: 09/30/1999
  • Status: Expired due to Term
First Claim
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1. A subsea system with a hydraulic actuator for operation of a process control device, in connection with recovery of hydrocarbons from a well, wherein the system comprises a supply line for supply of a supply fluid to the hydraulic actuator and a return line for removal of a return fluid from the hydraulic actuator;

  • the subsea system comprising a device for controlling the hydraulic actuator, the device comprising a housing and a body which is movable in the housing, and which together with the housing defines a low-pressure chamber, which communicates with the return line;

    the housing and the body also defining a high-pressure chamber, which communicates with the supply line, whereby the body'"'"'s position and thereby the volume of the low-pressure chamber are a function of the pressure of the return fluid and the supply fluid.

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