U.S. bankruptcy filings fell 6.9 percent over the past year, according to new government data. But three more big energy companies found themselves in Chapter 11 proceedings this week—in a boon to some big firm restructuring lawyers.

Houston-based oil and gas explorer Halcón Resources Corp. filed for bankruptcy Wednesday in Delaware as part of a $1.8 billion debt restructuring deal reached in May with key lenders. In court filings, Halcón lists $2.85 billion in assets against $3.15 billion in liabilities.