Sooner Inc., a member of Japan's Marubeni-Itochu Steel Group, one of the largest suppliers of oil country tubular goods, or OCTG, in the United States, has agreed to purchase Lafayette, CO-based CTAP LLC for an undisclosed amount. CTAP operates 11 service centers in the U.S. onshore and considered a major supplier of OCTG in the Bakken Shale and the Rockies.