San Antonio-based energy holdings company Group 42 is expanding its North American operations after one of its subsidiaries bought a local company that specializes in making pipelines, storage tanks and other oil field equipment. Group 42 announced on Tuesday that its subsidiary Well Flow Oilfield Services Holdings LLC bought San Antonio-based Texas Oilfield Fabrication & Pipeline LLC. Terms of the deal were not disclosed. Group 42 CEO Paul Bell said the acquisition will allow the San Antonio-based...