and in October 2007, there was a management change, which is not recognized by Tatneft. In March Tatneft filed international arbitration against Ukraine. On 9 July 2008, after signing an agreement between the United States and the Czech Republic to host a tracking radar for an antiballistic missile system, Tatneft reduced oil supplies through the Druzhba pipeline to the Czech Republic. Tatneft said that it re-routed volumes from the Czech Republic to Turkey due to better prices. Although officially the linkage between reduction of oil supplies and the radar agreement was not claimed, it was suspected. Assets of Tatneft in Ukraine were seized in May 2022, following the 2022 Russian invasion of Ukraine. Ecology In 2013, TatNIPIneft, the Tatar Oil Research and Design Institute devised a new technology called SSG-VUKSZHS, which increases the depletion of oil reservoirs using a composition based on silica gel. The technology has been applied by Tatneft to enhance the recovery of oil, after winning the Grand Prix for best exhibit, engineering design or technical solution at the XX International Oil and Gas Exhibition 2013 held in Baku, Azerbaijan, in June. References External links Tatneft analytics information Companies listed on the Moscow Exchange Oil companies of Russia Natural gas companies of Russia Oil companies of the Soviet Union Natural gas companies of the Soviet Union Companies established in 2000 2000 establishments in Russia Government-owned companies of Russia Companies based in Tatarstan Russian brands