Dear Sir/Madam: We introduce ourselves as a petroleum drilling equipment manufacture&supplier from China. Being the biggest petroleum drilling tools manufacture base in China,Jiangyin Changgang Pipe Making Co., Ltd produces Drill Pipe,Slick Drill Collar,Spiral Drill Collar,Integral Heavy Weight Drill Pipe,Integral Spiral Heavy Weight Drill Pipe,Kelly,Casing,Tubing and line pipe for oil well and gas well drilling. Best regards.
