Allseas’ Jacket Lift System on Pioneering Spirit Enters Testing and Commissioning Phase
Pioneering Spirit’s Jacket lift system, capable of lifting and transporting the largest supporting structures, has entered the testing and commissioning phase. In-harbour trials include raising and lowering the 170m lifting beams individually and, when connected, simultaneously. This enables our engineers to calibrate load measurements and verify the control modes and safety systems.
Current tests are focusing on the starboard beam, increasing the upend angle in phases to 110 degrees, the angle the beams reach during commercial jacket lifts. Up to 60 degrees, the upend system does most of the work. From 60 degrees, the centre of gravity moves outside the vessel, and the derrick wires control the tilting.
During operations, the aft-mounted beams lift and support entire jackets weighing up to 20,000 tonnes. This innovative technology enables direct transfer of structures to and from the quayside and eliminates the need for support barges. Significantly shorter operating times translates to major emissions savings!