We are Shijiazhuang LongWay Petroleum Drill Tolls manufacturer in china. We are exporting oil drill pipe, water well drill pipe, flat drill pipe, geological drill pipe, non-dig drill pipe and all kinds of drilling joints now. SIZE: 2-3/8&＃039;&＃039;, 2-7/8&＃039;&＃039;, 3-1/2&＃039;&＃039;, 4&＃039;&＃039;, 4-1/2&＃039;&＃039;, 5&＃039;’. GRADE: E-75, X-95, R-780, G-105, S-135 In the beginning of establishment, the company set up quality management system according to ISO9001 international standard and passed the certification by CQC quality inspection center.From May 2009, the company has established quality management system documents, which have been issued in accordance with both ISO9001:2008 standard and API SpecQ1 8th idt. ISO/TS29001:2007"Quality Program Specification for petroleum, petroleum and national gas industry". What&＃039;s more, in 2010 our company even got the certification of API 5DP, which is the best authority certification in the oil pipes field. Our products advantages: 1.High performance 2.Durable 3.Best service 4. Transport conveniently 5. Best price and so on. The Minimum Order: one container. Payment: 30% of invoice value by cash as deposit, the balance by T/T before shipment If you are interested in our products, you can contact with me at any time. Best regard