"American oil and gas companies have gone heavily into debt during the energy boom, increasing their borrowings by 55% since 2010, to almost $200 billion.

Their need to service that debt helps explain why U.S. producers plan to continue pumping oil even as crude trades for less than $50 a barrel, down 55% since last June.

But signs of strain are building in the oil patch, where revenue growth hasn’t kept pace with borrowing. On Sunday, a private company that drills in Texas, WBH Energy LP, and its partners, filed for bankruptcy protection, saying a lender refused to advance more money and citing debt of between $10 million and $50 million. Neither the Austin-based company nor its lawyers responded to requests for comment."

Erin Ailworth, Russell Gold, and Timothy Puko report for the Wall Street Journal January 6, 2015. [2]