design of offshore pipelines flooded and empty

I am a post-graduate student, and at present trying to do my thesis. I would appreciate if any offshore pipeline engineer can help me regarding any worked example on installation of pipielines flooded and also empty, for shallow and deep water. as you know, pipelines in deep waters, have thicker wall thickness to withstand hydrostatic pressure, but the thickness may become too excessive, and the weight of suspended pipeline become so great beyond the existing limits on the tensiner on the pipelay vessel. therefore the pipe may be flooded during installation , which means thinner wall thickness, and substantial material savings, If anyone is dealing in these lines of design work, or involved with the design of shallow and deep waters, and have any worked example, I would welcome it very much.
Best regards
REZA Received on Mon Sep 29 20:26:00 2003