Patent ID: 8905142
Filing Date: 2014-12-09
Classification: E21B

Abstract:
1. A guide frame for location at one or more points along the length of a riser tower structure of a type having an upper end supported at a depth below the sea surface and comprising a central core and one or more conduits extending from the seabed toward the surface, said conduits being arranged around said central core, wherein said guide frame is adapted to guide the conduits relative to the central core, and wherein said guide frame is attachable to said riser tower structure non-continuously, thereby not becoming an integral part of said riser tower structure, the guide frame being comprised of a plurality of main pieces which are arranged to be assembled together around said central core, and further including apertures for guiding the conduits, each of said apertures being formed from an indent in one of said main pieces of said guide frame, and wherein metallic plates are provided across each joint between the plurality of main pieces, attached to the main piece on either side of said joint.