Chesapeake Energy, fracking pioneer, files for bankruptcy owing $9bn

The Oklahoma City-based company helped turn the US into a global energy powerhouse but ran up huge debts in the process

Chesapeake Energy, the shale gas drilling pioneer that helped to turn the United States into a global energy powerhouse, has filed for bankruptcy protection.

The Oklahoma City-based company said on Sunday that it had been forced to enter chapter 11 protection because its debts of $9bn were unmanageable.