JEFA machinery is a full service,APIcertified, precision machining and fabrication business that specializes in the design and manufacture wellhead equipment for all of your petroleum and natural gas extraction applications.In addition to providing superior quality and competitive rates on API 6A&16C products and other wellhead supplies, we can also supply you with OEM projects. We are firmly dedicated to providing the highest quality products and services for today's oilfield industry. →Head office in Shanghai ,2 plants in Yancheng, Jiangsu →2011 sales over 200 million →Over 200 employees →Design and research capability We are constantly striving to improve designs,streamline manufacturing processes, and reduce costs so that we can better serve our customers.