In August 2014 Nautec completed the strengthening works on the jacket legs at LAM-28 platform, offshore Turkmenistan, as contracted by Dragon Oil Turkmenistan Ltd, with the purpose of ensuring the continued safety and integrity of the platform for work-over and continued production operations.
Dragon Oil Turkmenistan Ltd.
The scope of work included preparation of grout inlets and outlets; supply of grouting supervisors and equipment; and the grouting of jacket legs annuli using NaX® Ultra High Performance Cementitious (UHPC) grout.
The compromised part of the structure, which required strengthening work was located at -30m water depth. The preparation of grout inlets and outlets was carried out using divers. A flexible 2″ hose connected with 2″ ball valve and with female camlock at the end of the hose was used for feeding grout down into the clamps. The grouting spread was situated on the main deck of Gac Pearl Vessel.
The platform upgrading was carried out by means of grouting the annuli between the piles and legs of the old 6-legged jacket as well as the annuli between the newly added half frame and associated piles.
NaX® is a pumpable UHPC material especially developed for offshore applications. NaX® develops extreme mechanical properties combined with low shrinkage, early strength development and unique fatigue performance making it perfectly suited for structural strengthening of compromised subsea steel structures. Nautec’s strengthening works ensured continued safety and integrity of the platform for work-over and continued production operations.
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