Hicks Equity Partners (HEP), a private equity firm led by the Thomas O. Hicks family, announced that its portfolio company, Directional Rentals, Inc., has acquired Reamco, Inc., a company based in Lafayette, La., that manufactures, rents and refurbishes downhole drilling tools and related products used in the drilling industry. Directional Rentals, Inc., an oilfield services company, has also been renamed Drilling Tools International (DTI) to more accurately reflect the company's mission of renting…