WSP Holdings Limited is an integrated manufacturer specialized in oil country tubular goods (OCTG). The Company's products primarily consist of tubing, casing, line pipes and drill pipes. The Company also produces heat-insulating tubing, tube for perforating gun, slotted screen pipes, boiler tubes and other pipes, including electric resistance welding (ERW) pipes, in different specifications. The Company's product portfolio is divided into two categories: American Petroleum Institute (API) products and WSP series of products. The Company's API products include API 5CT tubing and casing, API 5L line pipes and API 5D drill pipe products. Its non-API products include high-collapse casing, tubing and casing for steam injection wells, carbon dioxide or hydrogen sulfide (CO2/H2S) resistant tubing and casing, H2S corrosion resistant tubing and casing, extreme-line drill pipe, CO2 corrosion resistant tubing and casing, WSP-1T Premium Connection Series and WSP-2T Premium Connection Series.