Exhibit 16 Office of Chief Accountant Securities and Exchange Commission 450 Fifth Street, N.W. Washington, D.C. 20549 April 17, 2002 Dear Sir or Madam: We have read Item 4 included in the Form 8-K dated April 17, 2002, of Halliburton Company filed with the SEC and are in agreement with the statements contained therein. Very truly yours, ARTHUR ANDERSEN LLP By Steve G. Scott PLR cc: Mr. Doug Foshee, Chief Financial Officer Halliburton Company