KUALA LUMPUR, Dec 26 — Petronas Carigali Sdn Bhd (Petronas Carigali), a wholly owned subsidiary of Petronas, has signed a memorandum of understanding (MoU) and two technical assistance agreements (TAAs) with Thailand’s PTT Exploration and Production (PTTEP) in relation to the development of PTTEP-operated Blocks SK405B and SK410B located off the coast of Sarawak.