Barge Zhong Ren 3 departing with jack-up rig Trident 4 on deck

Project Summary

The Transocean owned jack-up rig Trident 4 was dry towed from Angola to the Zadar Yard in Croatia on the semi-submersible cargo barge Zhong Ren 3. The rig carried legs with a length of 125 m (410 ft) each. An independent barge motion response analysis demonstrated that the design accelerations resulted in leg bending moments which were still within the maximum allowable moments. After a successful loading and seafastening operation, the barge departed Angola on May 24, 2004.  

Scope of Work

The project scope included:

• Provide design environmental criteria for the tow route;

• Calculate design barge motions and accelerations;

• Calculate design linear point accelerations at various levels above deck.

Acknowledgement

Photograph courtesy of Hydrographic and Marine Consultants BV