was extended for a further five years in December 2011. In 2011 Berezovsky brought a civil case against Abramovich in the High Court of Justice in London, accusing Abramovich of blackmail and breach of contract over the privatisation of Sibneft, claiming that he had been a co-owner of Sibneft and seeking over £3 billion in damages. This became the largest civil court case in British legal history. The court dismissed the lawsuit, concluding "that the sum of $1.3 billion paid by Mr. Abramovich to Mr. Berezovsky and Mr. Patarkatsishvili did not represent the sale price of Mr. Berezovsky’s and Mr. Patarkatsishvili’s alleged Sibneft interest, but rather was a final lump sum payment in order to discharge what Mr. Abramovich regarded as his krysha obligations." Private army In February 2023 Russian Prime Minister Mikhail Mishustin signed an order giving Gazprom Neft the right to form its own private army. Owners and management The principal owner of Gazprom Neft is OAO Gazprom, which controls 95.68% of the company's shares, while the remaining 4.32% are publicly traded. 20% of Gazprom Neft's shares were originally owned by the Italian oil and gas company Eni before being purchased by Gazprom for $4.1 billion in April 2009. Alexander Dyukov is CEO and chairman of the management board. Alexey Miller is chairman of the board. Operations Reserves and production As of 31 December 2012, Gazprom Neft and its subsidiaries hold the mineral rights to 74 license areas located in 11 regions of Russia. In Serbia, the Gazprom Neft's subsidiary Naftna Industrija Srbije, holds 69 licenses. Based on an audit of reserves conducted by DeGolyer and MacNaughton and according to the Petroleum Resources Management System standards, the company's proven reserves at the end of 2012 totaled 1.2 billion tonnes of oil equivalent, and its reserve replacement ratio was over 286%. Most of the company's oil production operations in Russia are carried out by three subsidiaries: Gazpromneft-Noyabrskneftegaz, Gazpromneft-Khantos and Gazpromneft-Vostok. These companies are developing fields in the Yamalo-Nenets and Khanty-Mansi autonomous areas and the Omsk, Tomsk, Tyumen and Irkutsk regions. Gazprom Neft also holds 50% stakes in three dependent companies: Slavneft, Tomskneft and Salym Petroleum Development. Together with Novatek it owns Arktikgaz. Refining In 2012, Gazprom Neft refined 43.3 million tonnes of oil. The company wholly or partly owns 5 oil refineries (the Omsk Oil Refinery, Moscow Oil Refinery, Slavneft-Yaroslavnefteorgsintez (YANOS) and two oil refineries in Pančevo and Novi