Offshore pipeline laying - from submersible work platform with swivelling guides for pipe section welding container

摘要

Pipelines are laid at great depths offshore by floating a container with a number of pipe lengths to site and lowering it to a work station at a safe depth (100m). The pipe sections are joined to each other by welding or mechanically and are lowered to the seabed in J-fashion at an adjustable angle. Provides a faster laying rate than the inclined ramp method,. It can be used for pipes of larger dia. than the reel method. Larger dias. and greater depths can be handled than with the flotation method and the new method is less dependent on weather conditions.