Sibir claimed in the body of the Statement of Claim that Sibneft ( together with Mr Abramovich ) and the offshore companies were liable to account to Sibir for the value of shares in Sibneft-Yugra with a nominal value of 255,000 roubles ( in the case of Sibneft and Mr Abramovich ) and 85,000 roubles ( in the case of the offshore companies ) which they had acquired as a result of the improper dilution of Sibneft-Yugra 's capital .