WILMINGTON, Del. - Bankrupt energy company Green Field Energy Services Inc. (GFES) on Jan. 8 filed a brief in the U.S. Bankruptcy Court for the District of Delaware defending its plan to pay bonuses to key employees on grounds that they are "necessary" to maximize the value of the bankruptcy estate (In Re: Green Field Energy Services Inc., No. 13-12783, Chapter 11, D. Del. Bkcy.).