News Drilling Rig Industry A drilling rig is a machine that creates holes in the earth subsurface. Drilling rigs can be massive structures housing equipment used to drill water wells, oil wells, or natural gas extraction wells,... Tags: Drilling Rig Diamond Drilling Rig Mining Drill Rig VIEW DETAILS Menu Enterprise News Trade News Technical Data Foreign Customers Domestic Customers Hot News Renowned Bolivian Companies Sign Large Pur... China Coal Group Achieves Another Successf... China Coal Group Participate In 'Good Pro... China Coal Group Exports A Variety Of Engi... China Coal Group Welcomes Yemeni Merchants... China Coal Group's Information Technology ... China Coal Group Celebrates The 75th Anniv... China Coal Group Held A Cultural Performan...