ZHANGJIAKOU RANRAN MACHINERY CO. Ltd is a high-tech Joint-stock company, located in Wudun industrial park, Qiaoxi district, zhangjiakou, Hebei province.

GSD, YSD series drill head style drills, GSp-C Drill-table style drils and GFD reverse circulation style drils are independent researched and developed, designed, and manufactured by RANRAN MACHINERY. They are mechanical products with independent intellectual property rights and a number of national patents for mechanical products, and they are drill equipments with multi-purpose, multi-driling technology (positive and reverse circulation for mud, air, etc. ). The products are widely used in driing wels folirigation, urban drinking water wels and construction of water seepage wels, ground source heat pump wels and other engineering such as the drilling of piles wells.

RANRAN MACHINERY focuses always on the customer demand. With many years of research and development RANRAN MACHINERY keep always the principle "more inn ovation, quick improvement" for production, and it is a technology leader for similar products in the domestic and foreign.