Diamond Offshore Drilling, Inc.

Diamond Offshore Company

Donald Paul Howard

Harris Allen Reynolds, Jr

Alan Hugh Summers

Kati Rachelle Andrus

Harris A Reynolds

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.

Riser floatation with anti-vibration strakes

A substantially cylindrical buoyancy module for a marine riser includes a plurality of buoyancy elements separated along at least one helical separation plane.

A cathodic protection system for use in an electrolyte includes a protected structure to be at least partially immersed in the electrolyte, at least one sacrificial anode to be at least partially immersed in the electrolyte and electrically connected to the protected structure, and a substantially impermeable barrier disposed between the at least one sacrificial anode and the electrolyte.

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Houston, TX, United States of America

Donald Paul Howard