Retrofitting of the second experimental section of the Achimov deposits of Urengoyskoye oil and gascondensate field for full development; Retrofitting of the Urengoyskaya site, incl. Tab-Yakhinsky section of UKPG-10; Booster compressor station at UKPG-1V of Yamburgskoye oiland gas condensate field (2nd stage)