Parker Drilling Company (Parker Drilling) is a provider of contract drilling, and drilling-related services and rental tools and services. The Company's business consists of two business lines: drilling services and rental tools services. Its Rental Tools Services business includes U.S. Rental Tools and International Rental Tools segments, and its Drilling Services business includes its U.S. (Lower 48) Drilling, and International & Alaska Drilling segments. In its Drilling Services business, the Company drills oil and gas wells for customers in both the United States and international markets. In its Rental Tools Services business, the Company provides rental equipment and services to exploration and production (E&P) companies, drilling contractors and service companies on land and offshore in the United States and select international markets. As of December 31, 2016, the Company had operations in 20 countries.