Halliburton Co (HAL.N), the world's No.2 oilfield services provider, reported a bigger first-quarter loss, hurt by $2.77 billion in charges for asset impairment and other reasons.

Net loss attributable to the company widened to $2.41 billion, or $2.81 per share, in the three months ended March 31, from $643 million, or 76 cents per share, a year earlier.

Halliburton had, on April 22, reported a 40.5 percent fall in revenue, to $4.2 billion, for the quarter, and said it had taken a $2.1 billion restructuring charge.

The company had at that time said it postponed releasing its full results to accommodate the April 30 deadline to close its acquisition of Baker Hughes Inc (BHI.N 0.00%).

The deal was called off on Sunday after opposition from U.S. and European antitrust regulators.