Gazstroyprom, Gazprom's construction contractor, issued a loan to Firma Armadis for the purchase of Gazprom burenie. The loan amounted to ₽68 billion. Gazprom Holding sold Gazprom Drilling to Arkady Rotenberg in 2011 for ₽4 billion. A similar scheme was used to acquire Stroygazmontazh. The company was purchased by an unknown Stroyinvestholding, and Gazstroyprom gave it a loan of ₽75 billion. Later, Stroygazmontazh merged with Gazstroyprom.