WILMINGTON, Del. - The U.S. trustee in the Chapter 11 bankruptcy case of Green Field Energy Services Inc. on Dec. 31 filed a brief in the U.S. Bankruptcy Court for the District of Delaware contending that the company should not be permitted to file under seal its plan to pay bonuses to its top employees (In Re: Green Field Energy Services Inc., No. 13-12783, Chapter 11, D. Del. Bkcy.).