H.H. Drill-Tech Drilling Machinery Co.,Ltd (former ianyungang Huanghai Machinery Co., Ltd.) is a large-scale key enterprise in the industry of geological exploration field. Founded in the year of 1969, the factory belonged formerly to Ministry of Geology and Mineral Resources of China. It is now a separate legal personality shareholding enterprise. Equipped with more than 40 years professional manufacturing experience and professional production team as well as more than 700 excellent skillful workers, more than 50 experienced engineers and more than four hundred sophisticated equipments, the high quality drilling equipments will be manufactured and supplied to our customers in the eighty thousand square meter area of working shops in the factory. The factory has been manufacturing three main series of products consisting of more than 40 kinds of drilling machine tools. The main products include XY-series core drills, which are applied in solid mine bed exploration drilling with the depth of 100-4200 meters(328-13776 feet), engineering geological exploration, superficial-zone petroleum and natural gas mining, mine gallery ventilation and water discharge tunnel drilling; GQ-series engineering drills, which are suitable for 0.8-3 meters(2.62-9.84 feet) diameter hole foundation stakes, located in complicated layers and hard layers, for bridge, road tall buildings construction; FDP-series hydraulic directional drilling rigs, which are mainly used in the construction of underground pipe systems. Lianyungang Huanghai Machinery is one of the leading manufacturers of geological exploration core drilling rigs for medium-depth hole drilling.Our products are designed, manufactured following quality control system of ISO9001:2000, and the series products of Full Hyduralic Core Rigs have passed the CE certificates of machine and equipment; among the main products, one of them has been awarded a National Silver Medal, three of them have been awarded the prize of National Innovated Product and four of them are in the leading position in China. At present, Huanghai Machinery is the largest manufacturer in the geological exploration field in China, with the most variety of products and the largest market share in China. Our products have been exported to more than twenty countries and regions, such as Canada, Australia, Turkey, Iran, South Africa and Russia and also the countries in Asia and South America.