In the case of Gazprom, the commission has found that the Russian energy company charges different prices across the EU. Lithuania, for instance, at times pays a third more than Germany.

National Oilwell Varco, Inc. (NYSE: NOV) reported that for its first quarter ended March 31, 2015, it earned net income of $310 million, or $0.76 per fully diluted share, compared to fourth quarter ended December 31, 2014 net income of $595 million, or $1.39 per fully diluted share. Excluding other items of $122 million in pre-tax charges related to an early retirement program, $9 million of Venezuela asset write-down, and $69 million of nonrecurring foreign tax exposure, net income was $466million, or $1.14 per fully diluted share, down 33 percent from the fourth quarter of 2014, and down 12 percent from the first quarter of 2014, excluding other items from all periods.

Looking into 2015 we face a very challenging market.

Oil Boom Returns to Gulf After Deepwater Horizon Disaster

The share-price boom at U.S. energy firms has gone bust, due to slumping global growth and tumbling crude prices.

National Oilwell Varco, Inc. (NYSE: NOV) announced today that its Board of Directors has authorized a share repurchase program to purchase up to $3 billion of the company's outstanding common stock.

Gazprom Neft looks to alternative suppliers to sidestep sanctions impact

Millionth barrel of oil produced at the Prirazlomnoye field

Dearth of oil finds threatens long-term supplies, price

National Oilwell Varco warns of Russian sanctions impact