The ongoing energy bust has claimed two more victims in Houston-based Key Energy Services Inc. and Fort Worth-based Basic Energy Services Inc., both of which filed for Chapter 11 protection this week in Delaware.

Basic Energy, an oilfield service company, has turned to Weil, Gotshal & Manges and Delaware’s Richards, Layton & Finger to handle a Chapter 11 case it filed Tuesday. The debtor is seeking to get a prepackaged reorganization plan approved so it can emerge from bankruptcy by year’s end.