Boart Longyear diamond drilling firm; Brainard-Kilman, a maker of civil engineering devices, such as well monitoring and test equipment; and ChemGrout a mfg of cement grouting equipment. Longyear acquired Slope Indicator Company, the nation's largest producer of geotechnical instruments, and Northern Air Supply in 1988, followed by the Campbell Pacific Division in 1989 and WTD Environmental Drilling in 1990. Then in 1994, North Star Drilling Company, specializing in sonic drilling was acquired. On January 2, 1995, Boart International and the Longyear Company officially merged into a single company and changed its name to Boart Longyear Limited. At this point the two companies
Boart Longyear Richard O'Brien, former CEO of Newmont Mining Corporation, joined Boart Longyear as CEO on April 1, 2013. To better focus on its core business and align with its long-term strategy, Boart Longyear announced the sale of its Environmental and Infrastructure drilling services operations to Cascade Drilling, L.P. of Woodinville, Washington on July 15, 2013. In August 2013, Boart Longyear founder, Edmund J. Longyear, was nominated for inclusion in the International Mining Hall of Fame. Longyear was nominated for his contributions to the U.S. iron ore mining and steel industries in the early part of the 20th century. He founded E.J.