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February 1, 2007 Project No. NT42951 Electronic File Name: NT42951PD.pdf Topical Report Preliminary Design of Insulated Drill Pipe for High Temperature, High Pressure Drilling Principal Authors: Al T. Champness Anthony J. Worthen John T. Finger Report Issued: February 1, 2007 DOE Award No.: DE-FC26-06NT42951 Submitted By: Drill Cool Systems, Inc. 627 Williams St. Bakersfield, CA 93305