As banks and oil company creditors pull the plug on struggling airlines, the blow will rebound on investors in aircraft leases.

It has filed dozens of lawsuits over pay disputes with the national oil company.

They understand when a punt on an oil company goes wrong because the well turns out to be dry.

At one point on the way they had sighted derricks, where a Japanese oil company was prospecting.

When an oil company builds a refinery, it decides at the outset what it will produce and constructs it accordingly.