The weak results reflect the broad uncertainty affecting the oil industry as depressed prices erode profitability.
Whiting posted a second-quarter net loss of $301 million, or $1.33 per share, compared with a net loss of $149.3 million, or 73 cents per share, in the year-ago period.
Excluding $1.4 million in fees to cancel drilling rig contracts early, as well as other one-time items, the company lost 70 cents per share.
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