The service and supply industry is Norway's second-largest industry in terms of turnover, after the oil and gas industry. Read more about the industry here. Schlumberger is the world's leading oilfield services provider. Cutting-edge solutions for reservoir characterization, drilling, production & processing. ABOUT OOISS Oman Oil Industry Supplies & Services Co. LLC (OOISS) is a highly reputable local company that provides numerous products, services & solutions. WHO WE ARE Mission Leadership position To create sustainable growth of value for our stakeholders through delivering innovative value-added solutions.