A buoyancy element, riser assembly including a buoyancy element and a method of supporting a riser are disclosed. The buoyancy element includes a body of at least partly flexible structure having a volume that is adjustable between an expanded and contracted position, and an entry port for fluid to be supplied to and/or removed from the body to thereby adjust the volume of the body.
https://app.acclaimip.com/pdf/y62JTPxilDZZrYkpGWKUOjIrG1ChDR5nAZtvt8o/US20140199124A1
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