Helmerich & Payne, Inc. engages in the contract drilling of oil and gas wells. It provides drilling rigs, equipments, personnel, and camps on a contract basis to explore for and develop oil and gas from onshore areas and fixed platforms, tension-leg platforms, and spars in offshore areas. The company conducts land drilling operations primarily in Oklahoma, California, Texas, Wyoming, Colorado, Louisiana, Mississippi, Pennsylvania, Utah, Arkansas, New Mexico, Alabama, Montana, North Dakota, and West Virginia; offshore drilling operations in the Gulf of Mexico, offshore of California, Trinidad, and Equatorial Guinea; and international land drilling operations in Ecuador, Colombia, Argentina, Mexico, Tunisia, and Bahrain. As of November 17, 2011, the company's existing fleet included 250 land rigs in the United States, 25 international land rigs, and 9 offshore platform rigs. The company also involved in the ownership, development, and operation of commercial real estate; and research and development of rotary steerable technology. Its properties comprise a shopping center containing approximately 441,000 leasable square feet; multi-tenant industrial warehouse properties of approximately 990,000 leasable square feet; and approximately 210 acres of undeveloped real estate. The company was founded in 1920 and is headquartered in Tulsa, Oklahoma.