WILMINGTON, Del. - The U.S. trustee in the Chapter 11 bankruptcy case of bankrupt oil and gas company Green Field Energy Services (GFES) on March 20 filed a brief in the U.S. Bankruptcy Court for the District of Delaware objecting to the examiner's motion seeking authorization to file his report under seal on grounds that it does not qualify to be sealed under the Bankruptcy Code (In Re: Green Field Energy Services Inc., No. 13-12783, Chapter 11, D. Del. Bkcy.).