KUALA LUMPUR, March 24 (Bernama) - Petroliam Nasional Bhd (Petronas) has signed a memorandum of understanding (MoU) with Schlumberger WTA (Malaysia) Sdn Bhd (Schlumberger) to jointly explore opportunities in the areas of susta inability,digital and Internet of Things (loT) technologies,as wellas research and development (R&D) projects.