Pile Installation Equipment Strengthens Saipem's Grip
Tuesday 23 June 2015
Houlder has delivered pin pile installation equipment to Saipem as part of the Shah Deniz gas field development in the Caspian Sea.
The development, 100km from Baku, Azerbaijan, requires the installation of eight steel jacket foundations for two new platforms. These are to use pin pile foundations temporarily prior to the installation of skirt foundations.
Saipem deployed the innovative restraining frame on the deck of the heavy lift ship Derrick Barge Azerbaijan (DBA) tasked with the jacket installation. It horizontally restrained and adjusted the inclination of 140m, 525t steel foundation monopiles – keeping them vertical as they are driven in 95m of water (pictured above.) This requires the frame to deliver operational horizontal force resistance of 75t in any direction within a 4m diameter operating envelope.
Houlder delivered the contract under a typical turnkey arrangement – being accountable for the design from initial concept through to fabrication. The 80t frame was supplied ex-works and packed ready for transport. Houlder sent a team of engineers to manage the installation in Baku.
Dario Frisinghelli, of Saipem commented "The restraining frame was used for offshore installation of all 8 foundation Pin Piles. The system, acting by hydraulic jacks on two degrees of freedom in the horizontal plane, proved greatly effective during operation. This allowed Saipem to maintain the verticality of the Pile during the transient phase of self-weight penetration to depth of 24m into the seabed. This control was particularly important during the first meters where a layer of hard soil resulted in an extremely reduced penetration speed affecting the overall instability of the pile."