Schlumberger and Smith International do not expect to have to sell any major assets to get antitrust clearance for the oilfield services leader's acquisition of Smith, a source familiar with the deal said on Sunday.

Schlumberger earlier on Sunday announced a deal to buy Smith in an all-stock deal that values the company at about $11.3 billion. Commenting after the Wall Street Journal reported on Friday that Schlumberger was in talks to buy Smith, analysts said government antitrust enforcers could give the deal a hard look.