2007 and 2008, Petrobras made several major oil discoveries including the Tupi oil field (formerly known as the Lula oil field), the Jupiter field, and the Sugar Loaf field, all in the Santos Basin, 300 km off the coast of Rio de Janeiro. The oil fields were discovered by partnerships that include Petrobras, Royal Dutch Shell, and Galp Energia. However, estimates for the reserves of these new fields varied widely. The P-51 Platform, the first semisubmersible platform built entirely in Brazil, capable of producing up to 180,000 barrels of oil per day, started production in the Campos Basin in January 2009, and in February 2009, China agreed to loan Petrobras US$10 billion in exchange for a supply of 60,000-100,000 barrels of oil per day to a subsidiary of Sinopec and 40,000-60,000 barrels of oil per day to PetroChina. In August 2009, Petrobras acquired ExxonMobil's Esso assets in Chile for US$400 million. In September 2010, Petrobras completed a US$70 billion share offering, the largest share offering in history, to be used to develop newly discovered oil fields. Giovanni Biscardi and Machado Meyer represented Petrobras. Biscardi brought his Brazilian corporate practice to Greenberg Traurig in January 2020. In 2012, Petrobras surrendered permits to explore offshore in New Zealand. Petrobras did not provide a reason but the New Zealand Prime Minister John Key said the decision was "not a reflection on the capacity to undertake deep-sea drilling or the prospect of activity of that area". He attributed the decision to a regrouping by the company after some setbacks. In July 2013, a worker strike action shut down production at several of the company's oil platforms. In September 2013, Petrobras sold eleven onshore exploration and production blocks in Colombia to Perenco for US$380 million. In September 2013 Organizações Globo reported on national television that the US National Security Agency (NSA) had been spying on Petrobras. The information was based on a top secret NSA file provided to Guardian journalist Glenn Greenwald by Edward Snowden as part of the Global surveillance disclosures. The file showed that Petrobras was one of several targets for the NSA's Blackpearl program, which extricates data from private networks. Petrobras announced that it was investing R$21 billion over five years to improve its data security. In 2014, the company sold its assets in Peru to PetroChina for US$2.6 billion. Also in 2014, Petrobras set a new company record for average daily