Downhole Drilling Services LLC

Schlumberger is one of the world's leading oilfield service businesses that offers technology, information solutions and integrated project management services that optimize reservoir performance for customers in the oil and gas industry. The company provides a wide range of products and services, including seismic acquisition and processing; formation evaluation; well testing, directional drilling, well cementing and stimulation; artificial lift and well completions; consulting; and software and information management. Its water services division specializes in assessing, developing and managing groundwater resources worldwide. Schlumberger employs more than 80,000 people in nearly 80 countries worldwide. The company operates in excess of 20 research and engineering facilities worldwide.

Founded in 1934, Parker Drilling Company provides contract drilling solutions, rental tools and project management services to the energy industry throughout the world. It operates more than 25 land rigs in various international markets and over 10 offshore barge rigs in the United States Gulf of Mexico transition zone. The company also maintains rigs owned by third parties. Parker Drilling Company provides engineering, maintenance and alliance management services, as well as health, safety, human resources and environmental programs. Headquartered in Houston, it maintains a training center in New Iberia, La. Parker Drilling Company operates a subsidiary Quail Tools, which, is one of the leading providers of specialized equipment for drilling and workover operations on rental basis in the U.S.