carry on to boost, to guarantee products excellent in line with market and consumer standard specifications. Our enterprise has a quality assurance system are actually established for China Petroleum Equipment Factory, Professional Octg Coupling Manufacturer, Petroleum Equipment , P110 Hak ,Seamless Elbow . We value your inquiry, For more details, please contact us, we will reply you ASAP! The product will supply to all over the world, such as Europe, America, Australia,Kuwait, Libya,Botswana, Marseille.With the advanced workshop, professional design team and strict quality control system, based on mid- to high-end marked as our marketing positioning, our products are fast selling onto European and American markets with our own brands such as below Deniya, Qingsiya and Yisilanya.