[September 20, 2010 H. Roger Schwall Re: PetroChina Company Limited Form 20-F for Fiscal Year Ended December 31, 2009 Filed June 25, 2010 File No. 1-15006 Dear Mr. Schwall: In order to fully prepare the answers to the issues raised in your letter, we respectfully request an extension of the deadline to November 1, 2010 to respond to your letter.]