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US 9,175,540 B2Granted
Control system for a subsea well
AssigneeVetco Gray Inc.
InventorsRobert Karl Voss, William Munro
Life of this patent
Estimating the term…
Abstract
A control system for a subsea well is provided. The control system comprises a tree comprising a hydraulic control supply line for use in opening a downhole safety valve as a result of hydraulic pressure in the line. A part of the line is carried by a structure which is subject to the pressure of a production fluid from the well used in the control system so that the line is separable in response to a failure of the integrity of the structure.
Claims14
A control system for a subsea well, the control system comprising:
- a tree comprising a hydraulic control supply line for use in opening a downhole safety valve as a result of hydraulic pressure in the line;
- a structure comprising a production wing block configured to carry part of the line, the line being mounted to an outer portion of the production wing block using a fastener, the line being directly connected to the tree, wherein the structure is part of the production fluid flow path downstream of the tree and defines part of a flow path of the production fluid from the well, and is subject to the pressure of a production fluid from the well used in the control system;
- wherein in response to a failure of the integrity of the structure, the line separates and vents fluid resulting in the closure of a downhole safety valve.
A method of controlling a subsea well, the method comprising:
- providing a tree with a hydraulic control supply line for use in opening a downhole safety valve as a result of hydraulic pressure in the line;
- and
- carrying a part of the line by a structure comprising a production wing block, the line being mounted to an outer portion of the production wing block using a fastener, the line being directly connected to the tree, the production wing block being subject to the pressure of a production fluid from the well;
- wherein in response to a failure of the integrity of the structure, the line separates and vents fluid resulting in the closure of a downhole safety valve.
1 more element
Dependencies are inferred from the claim text.