Patent ID: 6889770

Claim:
A method for protecting a subsea installation against cooling which leads to hydrate formation, in particular during interruption of production, by having parts of the installation ( 1 ) thermally insulated against the surrounding water ( 2 ), wherein the subsea installation ( 1 ) is completely or partially encompassed by a cap ( 3 ) which seals against the surrounding water ( 2 ), whereby the cap ( 3 ) encloses several elements which each separately can be subjected to internal hydrate formation, a bottom plate ( 9 ) is placed on a foundation ( 10 ) under water ( 2 ), the subsea installation ( 1 ) is placed on the bottom plate ( 9 ), the cap ( 3 ) is lowered onto the bottom plate ( 9 ) and is attached thereto; and wherein the cap ( 3 ) and the bottom plate ( 9 ) are attached to each other by fastener elements ( 19 , 20 ).