WSP Holdings Limited (WSP Holdings) is a holding company and conducts all of its operations through its subsidiaries in China. The Company is a manufacturer of seamless oil country tubular goods (OCTG), including casing, tubing and drill pipes used for oil and natural gas exploration, drilling and extraction. It sells its products in both domestic and international markets. In China, the Company target sales of its products primarily at Chinese oil companies. In the international markets, the Company has established an overseas customer base, covering oilfields in North and South America, the Middle East, Asia, Africa and Russia. Its product portfolio can be divided into two categories: API products and non-API products. The Company has developed nine series of non-API products. In addition to its seamless OCTG products, it also sells green pipes to its customers upon request.