Core Laboratories

Weatherford International is one of the world s largest diversified upstream oilfield service companies. With a corporate history that began in 1941, Weatherford has nearly $4.6 billion in annual revenues, approximately 24,500 employees in nearly 100 countries and more than 85 manufacturing facilities supporting 730 service bases. In 2005, Standard & Poor s announced the addition of the company to its flagship S&P Index. Following the completion of its 2005 acquisition of Precision Drilling Corporation's energy services and international drilling divisions, Weatherford was reorganized into four distinct businesses that include completion and production systems; evaluation, drilling and intervention; pipeline and specialty services; and international contract drilling. The company provides a variety of services to its customers that include drilling, evaluation, completion, production, intervention and industrial services. Weatherford International has locations throughout the United States, such as the office in Houston.

Schlumberger is among the world s leading suppliers of technology, project management and information solutions to the oil and gas industry. The company s real-time technology services and solutions enable its customers to translate acquired data into useful information. The company employs more than 58,0000 people in nearly 80 countries. Schlumberger is comprised of two business segments: Schlumberger Oilfield Services and WesternGeco. Schlumberger Oilfield Services supplies a wide range of products and services from formulation evaluation through directional drilling, well cementing and stimulation. WesternGeco, jointly owned with Baker Hughes, is among the world s the world s largest seismic company and provides advances acquisition and data processing services. Schlumberger manages its business through 27 GeoMarket regions. It maintains its principal offices in New York, Paris and The Hague. Additional locations include Houston.