Net profit for the three months to the end of March slumped to $380 million from $680 million in the comparable period a year earlier.
There was a $106 million negative reversal in foreign exchange items to deal with, while the company took a depreciation hit on an Australian well development programme.
Revenues sank 4% from $1.91 billion to $1.83 billion with the foreign exchange reversal accounting for $41 million.
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