Parker Drilling Company is an energy firm that specializes in drilling and workover services in domestic and international land and offshore markets. The company s land fleet of nearly 25 rigs operates in 10 countries. Its offshore fleet of more than 20 rigs consists of barge rigs in the Caspian Sea, Nigeria, Mexico and the Gulf of Mexico. Parker Drilling also operates rigs owned by third parties and coordinates engineering, logistics, health, safety and environmental programs. The company offers human resources, quality assurance programs, preventive maintenance and alliance management. It features expertise in a range of project management applications. Its primary subsidiary, Quail Tools, is a provider of specialized rental equipment. The company employs nearly 3,000 people worldwide. Parker Drilling Company has conducted business for more than 70 years and is headquartered in Houston.