WILMINGTON, Del. - Bankrupt oil and gas company Green Field Energy Services Inc. (GFES) on March 11 filed a brief in the U.S. Bankruptcy Court for the District of Delaware contending that its asset sale order protects all confidential information related to federal laws that may be involved with selling its equipment to third parties (In Re: Green Field Energy Services Inc., No. 13-12783, Chapter 11, D. Del. Bkcy.).