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US 9,845,644 B2Granted
Riser floatation with anti-vibration strakes
AssigneeDiamond Offshore Company
InventorsDonald Paul Howard, Alan Hugh Summers, Harris Allen Reynolds, Jr., Kati Rachelle Andrus
Life of this patent
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Abstract
A method of manufacturing marine riser buoyancy elements includes providing a master mold and mold inserts such that a range of buoyancy elements may be manufactured from one master mold and providing the mold inserts such that an annular space between the riser main conduit and the buoyancy elements, or a groove width between the buoyancy elements may be varied during manufacture.
Claims16
A method of manufacturing a marine riser buoyancy module, the method comprising:
- manufacturing substantially polygonal marine riser buoyancy elements having an arcuate aspect, the manufacturing comprising:
- providing a master mold and mold inserts such that a range of buoyancy elements may be manufactured from one master mold;
- and
- providing the mold inserts such that a helical groove width between the buoyancy elements may be varied during manufacture, and
- attaching two or more of the buoyancy elements to a riser, next to each other, such that a helical groove is formed by the space between the buoyancy elements, thereby assembling a portion of the buoyancy module.
2 more elements
A method of manufacturing a marine riser buoyancy module, the method comprising:
- providing marine buoyancy modules comprising axially-split, semi-cylindrical buoyancy elements;
- and
- affixing two or more supplemental buoyancy elements next to each other to an outer surface of the semi-cylindrical buoyancy elements, such that a helical groove is formed by the space between the adjacent supplemental buoyancy elements along a surface of the semi-cylindrical buoyancy elements, thereby assembling a portion of the buoyancy module.
Dependencies are inferred from the claim text.