Dongying Dayang Petroleum Equipment Co.,Ltd is a subsidiary and trade window of Hengxin Group which has more than 25 years experience in china, located in the rich & beautiful Yellow River Delta ¨C Dongying, where the second largest oilfield of China ¨C ShengLi Oilfield lies. Which specialized in producing Drilling Rigs and Drilling Parts such as Casing and Tubing, Drill Pipe, Pumping Units, Drawwoks, BOP, Mud Pump,Wellheads and so on.