Vantage Drilling Co. engages in the operation of a fleet of drilling units. The firm's principal business is to contract drilling units, related equipment and work crews, primarily on a day-rate basis, to drill oil and natural gas wells for its customers. The company also provides construction supervision services for drilling units. Through its fleet of drilling units, it provides offshore contract drilling services. The company provides contract drilling services with different types of modern, high-specification MODUs, including jackup rigs and drillships, and in different geographic regions. Its customers are primarily multinational oil and natural gas companies, government-owned oil and natural gas companies and independent oil and natural gas producers. A jackup rig is a mobile, self-elevating drilling platform equipped with legs and drillships that are self-propelled, positioned and suited for drilling in remote locations.