Sperry Drilling Services is a division of Halliburton, which is one of the largest providers of products and services to the energy industry in the world. The division offers a range of casing, directional and horizontal drilling solutions. It works in collaboration with Tesco Corporation and provides surface data logging services. Sperry Drilling Services also offers underbalanced applications and multilateral and rig site information systems. The division provides optimized pressure drilling solutions under the GeoBalance brand. It offers drilling software, conventional motors and rotary steerables. Founded in 1919, Halliburton maintains a staff of more than 50,000 employees in over 65 countries. The parent company serves the oil and gas industry.