Henan Dongfanglong Machine Manufacture Co., Ltd. is a modern and professional manufactory which was founded in 1999 and is located at the intersection of 106 National Highway and Jintian Road, Puyang City, Henan, China. The area of our company is over 53,000 square meters, and the area of workshop is over 16,000 square meters. Our company has integrated equipment and processing capacities of machining, heat-treatment, surface treatment, and hot extruding. For human resources, we have 16 senior engineers, 16 engineers and technicians and 14 inspectors, and have advanced processing technology and experience in casing and tubing couplings, pup joints, tool joints and down hole tools. Quality of our products is stable and excellent. Our products are widely used in central plain oilfield, dagang oilfield, shengli oilfield, and changqing oilfield. We have got unanimous approval from users. Main products of our company are various coupling models, pup joints, adapter pup-joints, adapter couplings, tool joints, stabilizers, anchors of oil pumps and revolving sand gravitated devices of wells, etc. Our company received ISO9001 quality certification issued by Chinese Quality Certification Center in April, 2004, and received API monogram license in Sept., 2007 (license number 5CT-0837) and May 2008 (license number 7-0649). We are the network member of material supplier of China Petro-chemical Co., Ltd. Central Plains Branch.Henan Dongfanglong Machine Manufacture Co., Ltd. has established and implemented the spirit of "Quality First, Service First, Realistic and Innovative, Mutual Benefits and Win-Win Result". Relying on advanced technology, modern equipment, strict management and a good reputation, our company continuously provides high-quality products and services for customers.