Russian state-controlled oil company OAO Rosneft (ROSN.RS) has placed $3 billion in Eurobonds, the company said Friday, as it seeks to finance its $55 billion buyout of competitor TNK-BP.

The bonds were placed in two tranches. The first, worth $1 billion, will expire on
March 6, 2017 and has a yield of 3.15%. The second, worth $2 billion, expires on March 6, 2022 with a 4.20% yield.

The order book was worth about $25 billion, with more than 1,000 orders for both tranches, Rosneft said.