Lang Exploratory Drilling is a wholly-owned subsidiary of Boart Longyear, a group of companies that comprise one of the world s leading suppliers of products, systems and services to the natural resource (minerals, energy and water), construction and quarrying, and industrial markets throughout the world. Boart Longyear is a member of Advent International, one of the world s leading private equity firms. Lang Exploratory Drilling provides rotary drilling services for the environmental, groundwater and mining industries. From air rotary-casing drivers to flooded reverse rotary, the company offers a wide variety of equipment and services. Lang Exploratory Drilling has a location in Salt Lake City, Utah.