CHINA GREATWALL DRILLING ENGINEERING COMPANY LTDA
It is a China National Petroleum Corporation (CNPC)filialcompany. The company aims at the provision of technic and oil engineering services being present in more than 28 countries.
Projects in Colombia
According to its website in Colombia, GWDC has worked with the company EMERALD ENERGY PLC Colombian branch providing oil related services in three contracts in the Casanare department in Gigante 3,6,8,4, and 5 areas and in drilling works.