CHEVRON LL652 MODULE TOWS

Project Summary

In August 1999, three Chevron LL652 modules were transported from the US Gulf to Lake Maraçaibo, Venezuela, using Crowley cargo barges. The modules ranged in weights from 4,500 to 6,000 t. For each tow, design motion response data was provided for the design of the grillage and seafastening. Special attention was paid to the still water and wave deflection of the barge hulls and the effect on the module supports. The photo below shows the departure of the 5,100 t heavy Gas Compression module on the Crowley BARGE 411. Upon arrival, the modules were successfully lifted off the barges and installed onto their jacket structures, using the Versatruss system.

Scope of Work

The project scope included:

Project Photographs

Photographs courtesy of Crowley Marine Services, Inc.

specialists in marine heavy-lift transportation engineering

naval architects

marine surveyors

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Est. 1992

■	Specify design weather criteria for each tow;
■	Model the cargo barge hulls for the hydrosdynamic analyses;
■	Provide the design motion responses for the tows and the resulting design accelerations acting on the modules;
■	Calculate barge hull still water bending moments and their worst case wave deflection.

Crowley barge 411 loaded with Chevron module

Crowley BARGE 411 departing with Chevron module