Baker Hughes World Headquarters, Texas

Baker Hughes is one of the largest oil services companies in the world, focusing primarily on drilling technology. An accretion of related companies, the brand's history includes the Baker International Corporation, which has roots back to well drilling tools in California, and the Hughes Tool Company of Houston, run by billionaire Howard Hughes' father. Today the company still makes the industry-standard tricone drill bits used all over the world, and provides a variety of well development, monitoring, evaluation, and service technologies.