On June 6, 2011, during his visit to Cuba, Chinese Vice President Xi Jinping visited an oil drilling field where Great Wall Drilling Co. (GWDC), a subsidiary of the China National Petroleum Corporation (CNPC), is arranging to provide drilling services to Cuba. Upon completion, the oil well will be the largest land drilling well in South America with a depth of 7,000 meters, and 6,200 meters of horizontal displacement. Since August 2005, GWDC has drilled 63 wells along the coast from Havana to Varadero, Cuba. The total output of petroleum and natural gas from these wells has reached 13 million barrels.
Source: Xinhua, June 9, 2011