Located in Pine Bluff, Ark., Wheeling Machine Products is a manufacturer of threaded couplings for oil country tubular goods with major facilities in Arkansas; Houston and Hughes Springs, Texas; and Birmingham, Ala. The company is a division of Lone Star Technologies Star Energy Group, one of the leaders in the manufacturing of threaded couplings for oil country tubular goods. It manufactures cases, tubes, couplings and line pipes for oil and gas exploration, production and transmission. The company offers a wide range of oil country tubular goods, including pipes for sour gas, high pressure, offshore and arctic wells applications, proprietary and standard American Petroleum Institute grades and tubular for less critical well applications. It also offers a variety of premium thermal treating, end finishing, inspection and logistic services.