Riser spacers for vertically moored platforms

Details Riser spacers for vertically moored platforms Riser spacers for vertically moored platforms

B - Operations, Transporting

63

B

114/58.5

B63B 35/44 (2006.01)

Patent

CA 1052193

ABSTRACT OF THE DISCLOSURE This invention relates to a structure floating on a body of water, and particularly a structure for drilling or producing wells from below the water. Boyant members support at least a part of the struc- ture above the surface of the water. The structure is connected to anchors in the floor of the body of water by a series of parallel leg members. Each leg member is composed of a plurality of elongated mem- bers, such as large diameter pipe usually called risers. These risers are parallel. Vertically spaced spacers are provided along the risers of each leg to (1) maintain the risers a fixed distance apart and (2) change the natural or resonant frequency of the individual riser pipes to be greater than the flutter frequency caused by the motion of the water past the risers.

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