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US 10,384,288 B2Granted
Underwater connection operations
AssigneeStatoil Petroleum AS
InventorsKjell Edvard Apeland, Jan Olav Berge, Greg Firth, Michael Armstrong
Life of this patent
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Abstract
There is described a method and associated apparatus for connecting a structure to equipment underwater, in particular for connecting a flange to a pipe under water. The pipe is provided under water, and a welding machine is provided in a welding space provided through a section of the pipe, and used to weld the flange to the end of the pipe, for example by internal metal inert gas welding.
Claims9
A method of connecting a flange to a pipe under water, the method comprising the steps of:
- providing a pipe under water;
- providing a welding machine comprising a weld head under water at or near the end of the pipe for connecting the flange to the pipe;
- attaching the welding machine to the flange and moving the attached welding machine and flange to a location at or near the end of the pipe, such that the flange is located adjacent the end of the pipe;
- locating the weld head in a welding space, the welding space being provided through a section of the pipe;
- and
- using the weld head in the welding space to weld the flange to an end of the pipe.
3 more elements
Dependencies are inferred from the claim text.