The prolonged economic slump plaguing the global energy industry pushed four money companies into bankruptcy in recent weeks, with a fifth teetering on the precipice.

Singapore-based offshore oilfield services firm Ezra Holdings Ltd. seeking Chapter 11 protection Saturday in White Plains, New York. Saul Ewing and Singapore’s Drew & Napier are advising Ezra in its bankruptcy case, one in which the debtor lists assets of up to $1 billion against up to $500 million in liabilities. Neither firm has yet filed billing statements with the bankruptcy court in White Plains.